Am not, is not, are not: making a present fact negative

1. Negate precisely the fact that is named

A negative with be removes one characteristic, role or location from the description. It does not automatically tell us the opposite characteristic or the person’s actual location.

A complete English sentence needs be: I am not busy. Not alone is insufficient; keep the form am even when the meaning already seems clear.

The room is not cold.

We know only that it is not cold. Without more facts, we cannot claim it is very hot.

I am not busy.

The speaker negates their present state; the sentence keeps am as its linking verb.

2. The subject first, then the correct be

Use am with I; is with he, she and it; are with you, we and they. Not does not change this choice. You takes are for both one listener and several.

A name or noun naming one object usually needs is. Several people or things need are: Anna is not…, Anna and Max are not….

How to build it

I am not… · he/she/it is not… · you/we/they are not…

You are not late.

Even when addressing one person, you needs are. The English sentence evaluates the current situation, rather than practising the past.

The bag is not heavy.

One bag is singular, so use is not.

Anna and Max are not neighbours.

Two names with and form a plural subject: are not.

3. The position of not, and the unchanged rest of the sentence

In an ordinary full negative statement, not follows am, is or are. To make a statement negative, do not move be before the subject or add do/does.

The negative itself does not remove an article, adjective or place: a teacher remains a teacher, at home remains at home. The assertion about the fact changes, rather than the sentence’s vocabulary.

How to build it

Subject + am/is/are + not + characteristic / role / place

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.

He is a teacher. → He is not a teacher.

Add not after is; a teacher stays unchanged.

We are not at home.

Not negates being at home. The place follows are not, and no auxiliary do is needed.

4. A contraction does not change the negative

Is not can contract to isn’t, and are not to aren’t. The pronoun and be can also contract: she is not → she’s not, we are not → we’re not. Both ways are usual; do not consider one incorrect solely because it looks different.

For the first person in neutral learner English, use I am not or I’m not. Do not combine two contractions in one word such as she’sn’t. If an exercise does not require a particular spelling, the full form and ordinary contraction are equally appropriate.

She is not ready. / She isn't ready. / She's not ready.

All three forms preserve the person, state and negative; the contraction choice adds no new fact.

We are not tired. / We aren't tired. / We're not tired.

You can contract are not or we are; the meaning stays the same.

I am not afraid. / I'm not afraid.

In the short neutral form, I am contracts, while not stays separate.

5. A statement that helps the listener

A negative often corrects an assumption: the listener has misunderstood a person, object or place. You can add a true fact in a second sentence, but do not invent it when it is unknown.

Short words such as Sorry or Thank you suit a polite answer. Politeness does not require removing not or reversing the fact.

I'm not the teacher. I'm a visitor.

The first sentence corrects the role; the second explains it. Distinguish the speaker from the listener.

I'm not cold, thank you.

This can answer an offer of warm clothes: it names the speaker’s state and keeps a polite tone.

The keys aren't on the desk.

This is useful clarification during a search. It does not mean the speaker knows exactly where the keys are.

6. The rule’s limits and accurate qualifications

Here we practise present statements with be: states, roles and places. A place can follow be + not, rather than just a role or characteristic: here, at home, in the office. Such a statement is also a complete sentence.

Saying “amn’t does not exist” is too categorical: dictionaries record it mainly in Scotland and Ireland. Our target is neutral I am not / I’m not. The regional form is outside this learning objective, rather than evidence that no such word exists.

Don’t be late is a grammatical request or command, rather than a double negative. It instructs someone not to arrive late, rather than stating You aren’t late. Questions, short answers without a named state, commands, was/were and negatives with other verbs are studied separately.

You aren't late. / Don't be late.

The first is a statement about the current situation; the second is an instruction. Both are grammatical, but serve different purposes.

She is not here.

Here names the place; no noun or adjective needs adding to make the negative complete.

Common mistakes

Incorrect:I not busy.

Correct:I am not busy.

This English construction needs am before not; keep the linking verb in the sentence.

Incorrect:She not is ready.

Correct:She is not ready.

In a negative statement, not follows is, rather than coming between she and is.

Incorrect:The bags is not heavy.

Correct:The bags are not heavy.

Bags is plural. Negation does not remove the subject’s agreement with are.

Incorrect:I are not a driver.

Correct:I am not a driver.

I needs am; not and a driver stay in place.

Incorrect:We don't are tired.

Correct:We are not tired.

Be is already the verb in this statement. Remove unnecessary do and put not after are.

Incorrect:She'sn't at home.

Correct:She isn't at home.

Do not combine she’s and n’t. Another correct minimal option is She’s not at home.

Sources