Present Tenses Review of Auxiliary Verbs

Learn English Tenses - English Grammar - Present Tenses Review of Auxiliary Verbs

Auxiliary/Helping Verb Usage

DO / DOES - Used simple present question and negative forms:
What time does he get up?
They don't drive to work. They take the bus.

DID - Used in simple past question and negative forms:
When did they arrive yesterday?
He didn't finish his homework last week.

IS / ARE / AM - Used in present continuous and for the future with 'going to':
They are working hard at the moment.
She is going to study medicine at university.

WAS / WERE - Past continuous:
I was watching TV when you arrived.
What were they doing while you were cooking dinner?

HAVE / HAS - Present perfect and present perfect continuous:
How long have you lived here?
I've been working since seven this morning.

HAD - Past perfect and past perfect continuous:
He had eaten by the time I arrived.
She had been studying for two hours when he finally telephoned.

WILL / WON'T - Future with 'will':
What will the weather be like tomorrow?
He won't understand.