FluencyLab
GrammarHub
Recognize how do, be and have work as auxiliary verbs to build questions, negatives, continuous forms and perfect forms.
Overview
Recognize how do, be and have work as auxiliary verbs to build questions, negatives, continuous forms and perfect forms.
Form and rules
Use do/does/did as auxiliaries for simple-tense questions and negatives with most main verbs.
Use be as the auxiliary in continuous forms: is working, were sleeping.
Use be as the auxiliary in passive forms: is made, was built.
Use have as the auxiliary in perfect forms: have finished, had left.
Be and have can also be main verbs, so identify whether they carry the main meaning or support another verb.
A closer look
Use have as the auxiliary in perfect forms: have finished, had left.
Be and have can also be main verbs, so identify whether they carry the main meaning or support another verb.
Examples
Do you work here?
She isn't sleeping.
The bridge was built in 1980.
We've finished the report.
He has a new car.
Common mistakes
A present-simple question with like uses do.
Present continuous uses be + -ing.
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.