Lesson 81: PURPOSE & USE

Here are some ways to show why you did something, why something exists, or what its use is.

Purpose

to + BASE VERB

We put on lots of clothes to keep warm.
You have to study hard to be a doctor.

NOTICE: We also use in order to the same way.

so that CLAUSE

We put on lots of clothes so that we wouldn't get cold.
I put it by the door so that I wouldn't forget it.
I took a taxi so that I'd arrive early.

because CLAUSE with want

I put it by the door because I didn't want to forget it.
I took a taxi because I wanted to arrive early.

NOTICE: We can give the purpose at the beginning of the sentence if we want to.

For example:
To be a doctor, you have to study hard.
Because I wanted to arrive early, I took a taxi.

Use

With for

The seats by the door are for the use of old people.
A pen is for writing with.
What did you do that for?
A barometer is a thing for measuring air pressure.

NOTICE: If there is a verb after for, it is the -ing form.