B1+Auxiliary verbs

Auxiliary verbs: different uses

Use do, be, have and modals not only to build tenses but also for emphasis, short answers, agreement and avoiding repetition.

Overview

What this grammar does

Use do, be, have and modals not only to build tenses but also for emphasis, short answers, agreement and avoiding repetition.

Form and rules

How it works

Auxiliaries build negatives/questions and tense/aspect structures: do you know, is working, has finished.

Do/does/did can add emphasis to an affirmative simple-tense statement: I do understand; she did call.

Auxiliaries can substitute for a repeated verb phrase: I haven't finished, but Ana has.

Agreement patterns use auxiliaries: So do I; Neither have we.

Short answers repeat the relevant auxiliary/modal rather than the full verb phrase: Yes, I can; No, she hasn't.

A closer look

Meaning and use

Agreement patterns use auxiliaries: So do I; Neither have we.

Short answers repeat the relevant auxiliary/modal rather than the full verb phrase: Yes, I can; No, she hasn't.

Examples

See the pattern in complete sentences

I do appreciate your help.

He said he didn't call, but he did.

I've finished, but they haven't.

She can drive, and so can I.

Will you join us? Yes, I will.

Common mistakes

What to avoid

I am understand your concern, but the rule can't change.

I do understand your concern, but the rule can't change.

Do can emphasize an affirmative present-simple statement.

She said she hadn't seen it, but I think she did seen.

She said she hadn't seen it, but I think she had.

Had can substitute for the repeated perfect verb phrase had seen it.

Ready to practise?

The test combines multiple choice, gap completion, error correction, and sentence building so students have to recognise and produce the grammar, not simply reread the rule.

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