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May and might: uncertain possibility

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.

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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.

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