What is ‘To Be’ Negative?
The verb to be is very important in English. We use it to talk about who someone is, what something is, where someone is, or how someone feels.
When you want to say that something is não true, não present, or não a fact, you use the negative form of to be.
The basic rule is simple: add not after the form of to be.
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How Do We Form Negative Sentences with ‘To Be’?
The negative form of to be changes depending on the subject (who or what the sentence is about).
- For I, use am not.
- For he, she, it, or a singular noun (like the dog), use is not.
- For you, we, they, or a plural noun (like the students), use are not.
What Are Contractions with ‘To Be’ Negative?
Contractions are shorter ways to say words. They are very common in spoken English and informal writing.
Here are the contractions for the negative forms of to be:
- I am not torna-se I’m not.
- He is not torna-se He isn’t.
- She is not torna-se She isn’t.
- It is not torna-se It isn’t.
- You are not torna-se You aren’t.
- We are not torna-se We aren’t.
- They are not torna-se They aren’t.
| Subject | Full Form | Contraction |
|---|---|---|
| I | am not | I’m not |
| He / She / It | is not | isn’t |
| You / We / They | are not | aren’t |
Exemplos
- I am not tired.
- She is not from Spain.
- We are not at school today.
- It isn’t cold outside.
- They aren’t happy about the news.
- My brother isn’t here.
Prática
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Spanish speakers sometimes make a common mistake by putting no directly before the verb, like in Spanish.
Incorreto: I no am a student.
Correto: I am not a student. ou I’m not a student.
Remember, in English, not always comes after the form of to be (am, is, are).
Another mistake is confusing isn’t e aren’t. Always check the subject:
- Uso isn’t for singular subjects (he, she, it, the book).
- Uso aren’t for plural subjects (you, we, they, the books).
Perguntas frequentes
What is the rule for ‘to be’ negative?
The rule is to add not after am, is, ou are. Por exemplo, I am not, he is not, we are not.
Can I use contractions always?
You can use contractions like isn’t e aren’t most of the time, especially in speaking and informal writing. In very formal writing, it’s better to use the full forms (is not, are not).
What is the negative of ‘I am’?
The negative of I am é I am not. The common contraction is I’m not.
What is the difference between ‘is not’ and ‘isn’t’?
There is no difference in meaning. Is not is the full form, and isn’t is the contracted (shorter) form. They mean the same thing.





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