Part A

Usamos o infinitivo (to + verb) para expressar o nosso propósito que temos ao fazer algo, para explicar o motivo pelo qual fazemos algo.

Example:

I called her to explain the situation.

We studied to pass the test.

I went to the supermarket to buy fruits.

Eu liguei para ela para explicar a situação. Ou seja, porque eu queria explicar a situação.

Também usamos o infinitivo para falar sobre o propósito de algo, ou por que alguém tem, quer ou precisa de algo.

Example:

The water is to keep the body hydrated during your workout.

She has a dog to keep her company.

I want an mp3 player to study at home.

Podemos usar in order e so as antes de (to + verb) para dar mais enfase em estilos mais formais.

I called her in order to explain the situation.

We studied so as to pass the test.

Não utilize for nestes casos.

Estaria errado dizer:

I called her for explaining the situation.	ERRADO
We studied for pass the test.	ERRADO

Exercises

1. Rewrite the following sentences according to the model.

The dog did all the tricks because it wanted to get the treat.

Possible answers:

a. She called because she wanted to place an order for delivery.

b. Katherine went to the door because she had to open it.

c. They went to the beach because they wanted to swim.

d. She went to New York because she wanted to go shopping.

e. We are going to study for the test because we need to get a good grade.

f. He took a book with him because he wanted to have something to read on the train.

g. Because we want to attract more customers we need to rethink our marketing strategy.

h. Because we wanted to bring him home left the party earlier.

i. Because she needed to study English she enrolled in our school.