Verbo to be: Observações

1. O verbo there to be (haver, existir) tem apenas duas formas there is para o singular e there are para o plural. There is not (there isn’t) e there are not (there aren’t) são usados para as formas negativas e is there? Are there? para as interrogativas:

There is a book on the table. (Há um livro sobre a mesa)

There are many books on the table. (Há muitos livros sobre a mesa)

There isn’t any bread.

There aren’t mountains in Nauru.

Is there a cat under the sofa?

Are there big cities in The Philippines?

2. Ao se referir a idade, use sempre o verbo to be:

She´s 19 years old.

I´m in my sixties.

Contractions

São junções entre os pronomes pessoais e um verbo (no caso to be) ou outras palavras, usadas geralmente na fala, na linguagem coloquial/informal:

No caso do verbo to be temos:

Positive	Negative
I am = I’m	I’m not
You are = You’re	You’re not ou You aren’t
He is = He’s	He’s not ou He isn’t
She is = She’s	She’s not ou She isn’t
It is = It’s	It’s not ou It isn’t
We are = We’re	We’re not ou We aren’t
You are = You’re	You’re not ou You aren’t
They are = They’re	They’re not ou They aren’t

Come on little boy, you aren’t brave enough to do it.

She isn’t a good girl.

That’s a good idea!

How’s it going?

What´s your name?

The Verb To Be

É um dos verbos mais usados na língua inglesa. Serve para descrever ou dar informação sobre algo ou alguma coisa. Nesse sentido equivale aos verbos ser e estar do português. No entanto, pode apresentar muitos outros sentidos dependendo do contexto: existir, ter, dever, etc. Apresenta a seguinte conjugação/estrutura:

Conjugação do verbo to be no simple present
Positive	Negative	Interrogative
I am	I am not	Am I?
You are	You are not	Are you?
He is	He is not	Is he?
She is	She is not	Is she?
It is	It is not	Is it?
We are	We are not	Are we?
You are	You are not	Are you?
They are	They are not	Are they?

Como é possível perceber, as perguntas são feitas mediante a inversão do verbo e do sujeito enquanto as negativas são feitas apenas com o acréscimo da palavra not:

I am a student. Are you a student too?

They are happy.

She is an intelligent girl.

Is it ok with you?

It isn’t cold today.

We are not at home now.