Practice Makes Perfect

may must

Present may must

Past might had to

Present Perfect N/A has had to

Past Perfect N/A had had to

Future N/A will have to

Future Perfect N/A will have had to

ought to should

Present ought to should

Past N/A N/A

Present Perfect N/A N/A

Past Perfect N/A N/A

Future N/A N/A

Future Perfect N/A N/A

to want to to need to

Present wants needs to

Past wanted needed to

Present Perfect has wanted has needed to

Past Perfect had wanted had needed to

Future will want will need to

Future Perfect will have wanted will have needed to

Auxiliary verbs like these are followed by an infinitive:

I can go. I want to go.

You must learn. You have to learn.

We should help. We need to help.

He can drive. He ought to drive.

Rewrite each sentence twice in the present tense: once by adding canand once by adding want to.

1. Serena buys a new car.


2. We borrow some money.


3. I leave at ten o’clock.

exercise 6-1

Auxiliary Verbs 45

03 (044-061) Units 6-9 11/3/04 1:41 PM Page 45