Page 90 - English Grammar - 7

Rememberemember
R
Action verbs describe activities and linking verbs establish a connection.

Be

The auxiliary be is used:

� in the formation of continuous tenses. For example:
He is working.
O
� in the formation of passives. For example:
The gate was opened.
O
� to indicate a plan, arrangement or agreement. For example:
I am to meet him tomorrow.
O
� to denote command. For example:
You are to write your name at the top of each sheet of paper.
O
Have

The auxiliary have is used:

� in the formation of perfect tenses. For example:
He has worked.
O
� with infinitive to indicate obligation. For example:
I have to be there by 5 o’clock.
O
� to express obligation in the past. For example:
I had to be there by 5 o’clock.
O
� in negatives and questions with do, does and did. For example:
They don’t have to go. Do they have to go?
O
Do
Auxiliary Verbs � to form the negative and the interrogative of the simple present and simple past tenses
The auxiliary do is used:

of the main verbs. For example:
He didn’t (did not) work.

O
Did he work?
O

to avoid repetition of a previous main verb. For example:
�
You met him, didn’t you?
O

She sings well. Yes, she does.
O

� to emphasise the affirmative nature of a sentence. For example:
You do look pale.
O
I told him not to go, but he did go.
O
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