Contractions of to be: the same idea in a shorter form
1. A contraction does not change the fact
I am here and I’m here say the same thing. A contraction removes some letters and marks their place with an apostrophe. It is a normal English form, especially in conversation and informal messages, rather than a separate tense.
The meaning alone does not tell you whether the written English form is contracted. First understand who is speaking and what they are stating, then look at how to be is written.
I am near the window. / I'm near the window.
I am near the window. / I'm near the window.
Both versions give the same location; I’m combines I and am.
They are our guests. / They're our guests.
They are our guests. / They're our guests.
The contraction neither changes the number of people nor adds a negative.
2. The subject first, then the right contraction
I combines with am, he/she/it with is, and you/we/they with are. Contracting the form preserves this agreement. Attach the apostrophe and ending to the pronoun without a space.
After the contraction, add the information: who someone is, what they are like or where they are. Do not add another am/is/are: in She’s ready, is is already contained in She’s.
I am → I’m; you are → you’re; he is → he’s; she is → she’s; it is → it’s; we are → we’re; they are → they’re
You're a good listener.
You're a good listener.
We address the listener: you are becomes you’re.
She's at the café. We're at home.
She's at the café. We're at home.
She needs is, while we needs are; the short forms differ.
He's new here.
He's new here.
He’s already means he is; no additional is is needed.
3. Negatives: more than one way to contract
In he is not, she is not and it is not, you can contract the pronoun with is or is with not: he’s not / he isn’t. Likewise, we’re not / we aren’t and they’re not / they aren’t. Both ways preserve the negative.
For I am not in the standard form practised here, use I’m not. Do not transfer aren’t from you to I. Regional amn’t occurs in Irish and Scottish varieties of English, but is not the target form in this course.
With a noun subject, contracting the verb with not is useful: The chair isn’t free; The chairs aren’t free. Do not insert they before aren’t when The chairs is already the subject.
is not → isn’t; are not → aren’t; I am not → I’m not
She's not tired. / She isn't tired.
She's not tired. / She isn't tired.
Both versions preserve she, is and negative not.
We're not hungry. / We aren't hungry.
We're not hungry. / We aren't hungry.
Contracting at different points does not create a different fact.
I'm not outside. The doors aren't open.
I'm not outside. The doors aren't open.
With I, use I’m not; combine plural doors with aren’t.
4. It’s and its: the apostrophe changes the structure
In these exercises, it’s means it is: we describe a characteristic, state or place. Its without an apostrophe expresses possession before a noun: its name, its door, its screen.
Check by substitution: if it is fits here, use it’s. If you mean a name, part or thing belonging to an object or animal already mentioned, use its. In other topics, it’s can also mean it has; we do not practise that meaning here.
It's an old phone. Its screen is clean.
It's an old phone. Its screen is clean.
First it is describes the phone; then its identifies whose screen it is.
It's a small shop. Its door is blue.
It's a small shop. Its door is blue.
It is a small shop makes sense, but it is door cannot replace its door.
5. The boundary: a short answer with no continuation
In a complete positive short answer after yes, keep full am/is/are: Yes, I am; Yes, he is; Yes, they are. Do not end such an answer with I’m, he’s or they’re.
If the sentence continues, a contraction is possible: Yes, I’m ready. A negative short answer can also use a contraction: No, I’m not; No, he isn’t; No, they’re not. The important point is the structure of the whole answer, rather than yes/no itself.
Are you ready? — Yes, I am.
Are you ready? — Yes, I am.
Am ends the positive short answer, so it is not contracted.
Are you ready? — Yes, I'm ready.
Are you ready? — Yes, I'm ready.
Ready follows I’m: this is a full statement, rather than the unacceptable standalone Yes, I’m.
Is the room cold? — No, it isn't.
Is the room cold? — No, it isn't.
Negative isn’t can end a short answer.
6. Natural in conversation, but not compulsory everywhere
Contractions suit everyday conversation, notes or messages to someone you know. A full form can also be correct in conversation, particularly for emphasis. Do not consider I am fine incorrect simply because I’m fine is possible.
The advice to use full forms in official texts is a style guideline, rather than a different grammatical meaning. Here we practise short everyday statements, rather than official letters.
For a self-check, ask: is the subject unchanged, is not preserved, is there an apostrophe, and can the sentence end here? If a task explicitly requests a contraction, a full form may be grammatical but miss that requirement. A model open answer is one possible version, rather than a list of every correct sentence.
I'm fine, thanks. / I am fine, thanks.
I'm fine, thanks. / I am fine, thanks.
Both forms are possible; the short form is usual in a relaxed reply.
They're not my bags. My bags are here.
They're not my bags. My bags are here.
You do not need to contract every verb: clearly correcting the misunderstanding matters.
Common mistakes
Incorrect:I's hungry.
Correct:I'm hungry.
I needs am, so the contraction is I’m. An apostrophe alone does not ensure agreement.
Incorrect:She's is ready.
Correct:She's ready.
She’s already includes is; the second verb is unnecessary.
Incorrect:The keys isn't here.
Correct:The keys aren't here.
Keys is plural. Contract negative are not to aren’t.
Incorrect:Its a quiet room.
Correct:It's a quiet room.
It is is required here, rather than possessive its before a noun.
Incorrect:The phone is old. It's screen is clean.
Correct:The phone is old. Its screen is clean.
The screen belongs to the phone: use its screen, rather than it is screen.
Incorrect:Are you here? — Yes, I'm.
Correct:Are you here? — Yes, I am.
Without a continuation, a positive short answer ends with full am.