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May and Might

Use may or might before a base verb when a present state or future event is possible but unconfirmed. Their meanings often overlap, so do not assign them fixed probability percentages.

Published

May and might: uncertain possibility

1. Possible, but not certain

May and might identify one possible present state or future development: The key may be in my bag. The bus might arrive after six. The speaker considers it possible without presenting it as an established fact or promise.

Look for uncertainty in the context: incomplete information, an unconfirmed time, several explanations or an outcome dependent on circumstances. Tomorrow and later alone do not require may/might: a confirmed timetable can use present simple, and a decision can use will or another form.

This lesson’s core is affirmative may/might for present and future possibility. Negative may not/might not is covered in the next lesson, while past speculation with may/might have + past participle is a separate, more advanced topic.

How to build it

Subject + may / might + base verb.

subject / S
—
The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
verb / V
—
A word for an action or state, such as work or be. The pattern determines its form.
V1 / base form
—
The base verb without to: work, go, be.

Daria may be in the kitchen.

Daria may be in the kitchen.

Daria’s current location is unconfirmed.

The parcel might arrive tomorrow.

The parcel might arrive tomorrow.

Delivery tomorrow is possible, but the time is not guaranteed.

The shop will open at nine.

The shop will open at nine.

Will presents a confident prediction or arrangement here rather than a tentative possibility.

2. Form: modal + base verb

May and might do not change with person: I may, she may, we might, they might. Use a base verb without to, -s, a past form or do-support: may come, might need, may be.

With be, the pattern describes a possible state or location: He might be busy. With a lexical verb, it describes a possible action or event: He might call later. Still, already and also normally follow the modal and precede the next verb: She may still be at work; The file might already be ready.

Do not combine may and might with one another or another modal in the same simple chain: not may might come or might will arrive. Choose one form matching the intention.

How to build it

Action: subject + may/might + base verb; state: subject + may/might + be + state or location.

subject / S
—
The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
verb / V
—
A word for an action or state, such as work or be. The pattern determines its form.
V1 / base form
—
The base verb without to: work, go, be.

She may join us after lunch.

She may join us after lunch.

Join remains a base form after she may.

The room might still be free.

The room might still be free.

Still goes between might and be.

I may need more time.

I may need more time.

May is unchanged with subject I; need does not take to.

3. A present state or future event

For the present, may/might be often precedes a location, state or adjective: The manager may be upstairs. The road might be icy. This is not past tense: might can refer to now in such sentences.

For the future, may/might precedes a base verb and can combine with a time expression: We may finish at five. The guests might arrive later. Do not add will after the modal.

Preserve the situation’s facts. A possibility about this delivery today does not become a general claim about all deliveries. After six does not become at six.

How to build it

Possibility now: may/might be …; future possibility: may/might + base verb + time.

verb / V
—
A word for an action or state, such as work or be. The pattern determines its form.
V1 / base form
—
The base verb without to: work, go, be.

The manager may be in the other office.

The manager may be in the other office.

A supposition about a current location.

We might finish the meeting at five.

We might finish the meeting at five.

The future finishing time is not confirmed.

The document may already be ready.

The document may already be ready.

Already naturally precedes be in this modal chain.

4. May, might and could often overlap

In many contexts, may, might and could express the same core idea: something is possible but uncertain. Differences depend on register, intonation, speaker and situation. May often sounds more formal, but this is not a universal probability scale.

Do not learn a formula such as “may = 60%, might = 30%”. Authoritative references recognise overlap, and speakers do not always rank the forms alike. Without a specified construction target or register, both may and might are often acceptable.

Could has other functions too. We could meet online can suggest an action; The meeting could be online can express speculation. This curriculum does not reject could as a possibility form; distinguish it from may/might only when the task explicitly requests a particular construction or establishes a suggestion.

The service may be delayed.

The service may be delayed.

May is natural in a formal notice of an uncertain risk.

The service might be delayed.

The service might be delayed.

Might expresses the same basic uncertainty in a neutral context.

The service could be delayed.

The service could be delayed.

Could also grammatically expresses a particular possibility.

5. Distinguish a particular supposition, general possibility and fact

May/might/could suits a particular unknown situation: This bus may be full after five. Can often describes general possibility or what sometimes happens: Buses can be full after work. The distinction is the claim’s scope rather than the word’s strength.

Will, present simple or ordinary be can present a confirmed fact, schedule or confident decision: The train leaves at 18:10. I will call at six. Do not silently replace may/might with these when the task explicitly says the information is unconfirmed.

Maybe is an adverb; may is a modal verb. Maybe normally comes at the start: Maybe the café will open later. In the modal construction, write may separately from be: The café may be open.

Flights can be expensive in August.

Flights can be expensive in August.

A general possibility that can recur.

Our flight may be expensive.

Our flight may be expensive.

A particular tentative supposition about one flight.

Maybe our flight will be expensive.

Maybe our flight will be expensive.

Maybe is an adverb and does not replace modal may within its structure.

6. Questions and the boundary with permission

May I…? and May we…? normally request permission in modern English: May I use this chair? This is a different pattern using the same modal. The chair may be free describes a possible state without asking permission.

Might can form a direct possibility question through inversion: Might the meeting start later? This is grammatical but often formal or tentative. In ordinary conversation, Do you think the meeting might start later? and Is it possible that…? are natural alternatives.

Direct possibility questions with may are unusual in standard modern English; inverted may mainly suggests permission. Closed exercises therefore should not force an artificial May the bus arrive late? as the sole answer.

How to build it

Permission: May I/we + base verb?; speculation: Might + subject + base verb? / Do you think … might …?

subject / S
—
The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
verb / V
—
A word for an action or state, such as work or be. The pattern determines its form.
V1 / base form
—
The base verb without to: work, go, be.

May I open the window?

May I open the window?

The speaker asks permission to do something themselves.

The window may be open upstairs.

The window may be open upstairs.

The affirmative sentence describes an unknown state.

Do you think the delivery might arrive today?

Do you think the delivery might arrive today?

Might remains inside a natural question about possibility.

7. Boundaries and use in conversation

May not and might not can mean an event possibly will not happen, but that is the next lesson’s core. Negation is mentioned here only as a boundary; do not add it automatically when an affirmative possibility is requested.

May/might have + past participle speculates about the past and needs a separate explanation. This A2 material does not require producing it: its productive targets concern a possible state now or an event ahead.

Combine uncertainty with a practical response without inventing confirmation: The technician may arrive after three, so I’ll keep my phone nearby. The first part remains a possibility; the second states your actual decision.

The technician might arrive after three, so I'll keep my phone nearby.

The technician might arrive after three, so I'll keep my phone nearby.

An uncertain event motivates a definite decision.

We may work from home tomorrow; the plan is not confirmed.

We may work from home tomorrow; the plan is not confirmed.

The context explicitly explains the uncertainty.

The letter might have arrived yesterday.

The letter might have arrived yesterday.

A past-reference form shown only at the topic boundary, outside the exercise targets.

Common mistakes

Incorrect:She may to join us later.

Correct:She may join us later.

After may, use base form join without to.

Incorrect:The train might arrives after six.

Correct:The train might arrive after six.

After might, the verb does not take -s.

Incorrect:Omar may is in the other office.

Correct:Omar may be in the other office.

After modal may, use base form be rather than is.

Incorrect:Do the meeting might start later?

Correct:Might the meeting start later?

A direct question with might uses inversion without do.

Incorrect:It maybe rain this afternoon.

Correct:It may rain this afternoon.

May is a modal before rain. Maybe is a separate adverb needing another structure, such as Maybe it will rain.

Sources

May not and might not: possibly not

1. The uncertainty concerns a negative idea

May not and might not mean “possibly not”: The café might not be open means that the café may be closed, but the speaker does not know for certain. Not negates the state or event after the modal, while may/might keeps the whole conclusion uncertain.

The context should show why the outcome is unconfirmed: the schedule is still changing, someone has not replied, information is limited, or several explanations are possible. Today and tomorrow do not select the modal form by themselves.

Affirmative may/might names a possible event; may not/might not names its possible absence. Lina may come and Lina may not come have opposite polarity, but both leave the outcome open.

How to build it

subject + may not / might not + base form of the verb

subject / S
—
The grammatical subject: who or what the clause is about; the verb agrees with it. In The book was written, the book is the subject, although someone else does the action.
verb / V
—
A word for an action or state, such as work or be. The pattern determines its form.
V1 / base form
—
The base verb without to: work, go, be.

Nina may not be at work today.

Nina may not be at work today.

Her absence is possible but unconfirmed.

The bus might not stop here tonight.

The bus might not stop here tonight.

The possibility concerns the bus not stopping.

Leo may join us, but Sara might not come.

Leo may join us, but Sara might not come.

The pair shows positive and negative possibility without a guarantee.

2. Form: modal + not + V1

May and might do not change for person: I may not, she may not, we might not. In the basic pattern, not follows the modal and the next verb takes its base form, without to, -s, or do-support: may not arrive, might not know, may not be.

With be, the construction describes the possible absence of a state, location, or property: The room might not be free. With another verb, it describes the possible absence of an action or result: The parcel may not arrive today.

An adverb can refine the idea, but keep natural word order: She may still not know the address; The document might not be ready yet. At A2, reliably maintaining modal + not + V1 matters more than building complex sequences.

How to build it

may/might + not + be · may/might + not + V1

V1 / base form
—
The base verb without to: work, go, be.

Omar might not know the new address.

Omar might not know the new address.

Know does not take -s after might not.

The office may not open on Monday.

The office may not open on Monday.

After may not, use open without to.

She may still not have the final number.

She may still not have the final number.

Still precedes not; have remains a base form.

3. A state now and an event ahead

For present meanings, we often use may/might not be + location or adjective: The manager may not be upstairs; The printer might not be ready. Might does not make these sentences past.

For the future, may/might not precedes a base-form action with a time expression: We may not finish by five; The guests might not stay for dinner. Preserve by five and for dinner because they define the scope of the possible negative outcome.

The negation may have a narrow scope. The train might not arrive before noon does not assert that the train will never arrive; it may arrive at noon or later. Do not extend not beyond what the sentence supports.

The key may not be in this drawer.

The key may not be in this drawer.

This is an uncertain supposition about its present location.

We might not finish the report by five.

We might not finish the report by five.

The uncertain outcome has a precise time limit.

The parcel may not arrive before lunch.

The parcel may not arrive before lunch.

The sentence does not rule out arrival after lunch.

4. Might not, mightn’t, and neutral may not

Might not has the standard contraction mightn’t: It mightn’t work on an older phone. The full form might not is clear across registers; the contraction is possible but less usual in many contexts. The practice accepts both where the particular form is not itself the target.

For may, the neutral modern form is may not. Oxford records mayn’t but explicitly notes that it is hardly used in modern English; the BBC also describes it as unusual. An A2 learner should therefore consistently write may not while recognising that the rare mayn’t can occur.

Do not claim that every rare contraction is entirely nonexistent. If a task tests neutral contemporary wording specifically, it states that requirement; otherwise, assess meaning and form rather than inventing a universal prohibition.

How to build it

neutral: might not / may not; contraction: mightn’t; rare form: mayn’t

The app might not work offline.

The app might not work offline.

The full form is neutral and clear.

The app mightn’t work offline.

The app mightn’t work offline.

Mightn’t is a correct contraction of might not.

The payment may not go through.

The payment may not go through.

May not is a reliable neutral choice at A2.

5. May not can also express formal prohibition

In a speculative context, The museum may not open on Monday means that it is possible the museum will not open. But in a rule or official notice, Visitors may not enter means that visitors are not allowed to enter. One form has two meanings, so consider the situation, not just the words may not.

Mustn’t also expresses prohibition, while can’t often expresses impossibility, inability, or prohibition depending on context. Do not automatically replace may not/might not expressing uncertain negative possibility with mustn’t or can’t.

In an ordinary A2 possibility context, might not is not the standard way to impose a rule on others. It is therefore often useful for avoiding the ambiguity of may not between speculation and formal prohibition.

The library may not open on Sunday; the schedule is not final.

The library may not open on Sunday; the schedule is not final.

The event is unconfirmed.

Visitors may not enter the staff room.

Visitors may not enter the staff room.

This is an official rule, not a supposition.

You mustn’t touch this switch.

You mustn’t touch this switch.

Mustn’t directly prohibits the action.

6. Do not confuse possibility with fact, expectation, or impossibility

Mia might not come means that her coming remains possible, but her not coming is also possible. In a context of confirmed cancellation, Mia won’t come presents a much more certain negative outcome. Will/won’t has different functions, so teaching contrasts should always show the source of certainty.

Maybe Mia won’t come is a natural paraphrase of uncertainty: maybe has scope over the clause containing won’t. Mia probably won’t come expresses an expectation of a negative result. This is not a numerical scale; the words convey different speaker positions in a particular context.

That can’t be Mia means that the speaker rejects the possibility on the basis of evidence. Mia doesn’t work on Fridays describes a usual fact or schedule. May not/might not are not direct substitutes because they leave the particular conclusion uncertain.

Mia might not come; she hasn’t decided yet.

Mia might not come; she hasn’t decided yet.

The outcome remains open.

Mia won’t come; she cancelled this morning.

Mia won’t come; she cancelled this morning.

The context provides confirmed cancellation.

That can’t be Mia; she is in another city.

That can’t be Mia; she is in another city.

Can’t expresses logical impossibility, not an uncertain “possibly not”.

7. Scope and use in communication

This rule practises uncertain negation about a present state or future event. Affirmative may/might belongs to the preceding rule but is needed to contrast polarity. Past speculation with may/might not have + V3 is studied separately and is not a productive target here.

In a real message, a negative possibility often leads to a check or backup plan: The room might not be free, so I’ll check the booking. The decision does not turn the supposition into a fact; it merely accounts for the risk.

Preserve the scope of not, the time, the participants, and the object. If the prompt says “possibly not by five”, do not turn it into “definitely never”. If there is an official prohibition, do not explain it as a chance possibility.

The room may not be free, so I’ll check the booking.

The room may not be free, so I’ll check the booking.

An uncertain risk motivates an actual check.

We might not finish by five, so I’ll warn the client.

We might not finish by five, so I’ll warn the client.

The time limit and response are preserved.

The parcel might not have arrived yesterday.

The parcel might not have arrived yesterday.

This is a past form; it only illustrates the boundary of the topic and is not practised here.

Common mistakes

Incorrect:She mights not join us tonight.

Correct:She might not join us tonight.

The modal might does not take -s after she.

Incorrect:The office may not to open tomorrow.

Correct:The office may not open tomorrow.

After may not, use the base form open without to.

Incorrect:They don’t might arrive on time.

Correct:They might not arrive on time.

Negate the modal by putting not after might, without do.

Incorrect:Rina might not is at home.

Correct:Rina might not be at home.

After might not, use the base form be, not is.

Incorrect:The bus may not stops here tonight.

Correct:The bus may not stop here tonight.

After may not, stop does not take -s.

Sources

May for Formal Permission Requests

1. Permission for the Speaker’s Action

May I…? asks the listener to allow the speaker to perform an action: May I come in? With May we…?, the speaker asks on behalf of themself and their group: May we use this room? This is a question about permission, not a statement about ability or possibility.

May is especially natural when the situation is clearly formal: an official meeting, reception, archive, interview, or conversation with the chair of a meeting. In ordinary conversation, Can I…? is often the most common option, while Could I…? is a polite and somewhat more cautious request.

Do not consider May I…? universally better. Depending on the people and context, it may sound appropriate, very formal, ceremonial, or even playful. In exercises, the form may is required only when the instruction explicitly sets that goal or formal register.

How to build it

May + I/we + base form + object / place / time?

V1 / base form
—
The base verb without to: work, go, be.
object / O
—
Who or what an action affects: in I read a book, a book is the object.

May I come in, Dr Evans?

May I come in, Dr Evans?

The speaker is formally asking permission to enter themself.

May we use the conference room until four?

May we use the conference room until four?

We includes the speaker and the group, and until four sets a precise limit on the permission.

Can I sit here?

Can I sit here?

This is a grammatical and common everyday request, not a mistake.

2. Word Order and the Base Form

In a question, the modal may comes first, followed by I or we, and then the base verb: May I ask…? May we leave…? Do not add do: not Do may I…? and not May do I…?.

After may, there is no to, -s ending, or -ing form: May I use…?, not May I to use…?; May we enter…?, not May we enters…?. May itself already creates the modal structure.

The object, place, and time come after the action and clarify exactly what permission is needed for: May I borrow this key until noon? A question mark completes the full request.

How to build it

May I/we + V1 …? No do, to, or -s ending.

V1 / base form
—
The base verb without to: work, go, be.

May I sign this form now?

May I sign this form now?

Sign is the base form, while this form and now set the exact limits of the action.

May we leave our bags at reception?

May we leave our bags at reception?

May comes before we, and leave has no to or -s.

May I briefly interrupt?

May I briefly interrupt?

The adverb briefly can come between I and the base verb interrupt.

3. Roles, Action, and the Limits of Permission

I or we identifies the person or people who want to perform the action. May you open the window? is not the usual way to ask the listener to open the window; for the listener’s action, Could you open the window, please? is natural.

A good request keeps the exact action, object, and time. May I borrow your pass until five? does not mean May I keep your pass? or May I borrow it tomorrow? Changing the action, object, or limit creates a different request.

In the answer, the roles change: someone hears May I…? and answers Yes, you may, because they are now addressing the person who asked. For May we…?, the listener can also answer Yes, you may, addressing the whole group.

May I borrow your visitor pass until five?

May I borrow your visitor pass until five?

The action, object, owner, and time of the permission are stated directly.

Could you open the window, please?

Could you open the window, please?

This is a polite request for the listener to perform an action, not a request for permission for I/we.

May we record the first ten minutes?

May we record the first ten minutes?

The request concerns a group and has a precise time limit.

4. Giving or Refusing Permission

Formal short answers can repeat the modal may: Yes, you may. / No, you may not. In an affirmative statement, You may… already grants permission: You may use the room until noon.

In natural conversation, fuller responses are also common: Certainly. Please do. / Yes, that's fine. / I'm afraid not; the room is in use. They may sound softer or less formal without being grammatically worse.

A refusal should preserve the subject of the request. If someone asks to photograph a document, an answer about being forbidden to enter a room does not answer the request. A reason is useful, but it should not invent a new permission or a new prohibition.

How to build it

grant permission: Yes, you may. / You may + V1; refuse permission: No, you may not. / I’m afraid not.

V1 / base form
—
The base verb without to: work, go, be.

Yes, you may use the desk until noon.

Yes, you may use the desk until noon.

You matches the role of the person who asked, and the time limit of the permission is preserved.

No, you may not photograph this document.

No, you may not photograph this document.

The formal refusal repeats the exact requested action and object.

I'm afraid not; the room is already in use.

I'm afraid not; the room is already in use.

A natural fuller refusal does not have to repeat may.

5. Can I, Could I, and May I

Can I…? is the most common way to ask permission in many everyday situations. Could I…? often sounds polite and cautious. May I…? is fairly formal and less common, but natural in an appropriate context.

Do not construct an absolute scale in which one option is always more polite or more correct. Tone of voice, relationships, setting, the word please, and the reason for the request also affect appropriateness. A formally correct May I…? may be too formal between close friends, but it is not ungrammatical.

In a closed exercise, choose may only when the instruction explicitly requests May I/we or establishes a formal register. If the context does not distinguish the forms, Can I, Could I, and May I may all be natural alternatives and require open-ended self-checking.

Can I use your charger?

Can I use your charger?

A common everyday request between people who know each other.

Could I leave a little early today?

Could I leave a little early today?

A polite, somewhat cautious request for permission.

May I address the committee now?

May I address the committee now?

The formal institutional situation supports may.

6. The Same May, but Other Meanings

The director may arrive later — a statement about possibility, not permission. May I leave? — a question about the speaker’s action. Word order, the subject, and the situation distinguish these functions.

May not also depends on the context. Visitors may not enter the archive — a formal prohibition. The director may not attend — uncertainty: perhaps the director will not come. Do not interpret the form without considering the roles and the source of the rule.

Are we allowed to take photos? asks about a rule or whether permission exists and is especially useful with other people and tenses: Will visitors be allowed to enter? This is a grammatical alternative, but not the same target structure as May I/we…?.

The chair may arrive after lunch.

The chair may arrive after lunch.

The affirmative word order shows possibility.

Visitors may not enter the archive.

Visitors may not enter the archive.

The official rule expresses a lack of permission.

Are we allowed to take photos here?

Are we allowed to take photos here?

The question with be allowed to clarifies the rule without repeating the target May we form.

7. Related Intentions and Carrying the Form into Dialogue

Could you send the file? asks the listener to do something. We could send the file tomorrow suggests an option. Do we have to send it today? asks about an obligation. May we send it tomorrow? asks permission for the group’s action. Shared vocabulary does not make the intentions identical.

May I help you? can function as a formal offer of help, grammatically framed as permission to help. Do not call this utterance a mistake; in this lesson, we are practicing clear cases in which permission for the speaker’s action is central.

In your own dialogue, combine a precise request with a response and a consequence: May I scan page twelve? — Yes, you may, but please return the book by four. — Thank you. I'll bring it back by four. This shows the action, limit, roles, and result of the permission.

We could meet at three.

We could meet at three.

This is a suggestion, not a request to an authorized person.

Do we have to leave now?

Do we have to leave now?

The question concerns an obligation, not permission.

May we leave after the vote?

May we leave after the vote?

The group is formally asking permission for its own action at a clearly specified time.

Common mistakes

Incorrect:Do may I enter the office now?

Correct:May I enter the office now?

The modal may itself moves to the first position; do is not needed.

Incorrect:May I to use this desk until noon?

Correct:May I use this desk until noon?

The base form use is required after may, without to.

Incorrect:May I asks one more question?

Correct:May I ask one more question?

The verb does not take an -s ending after may.

Incorrect:May we can record the first ten minutes?

Correct:May we record the first ten minutes?

In a simple modal chain, do not use may and can together.

Incorrect:May I using the printer now?

Correct:May I use the printer now?

The base form use is required after may, not the form using.

Sources
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