Test your knowledge on auxiliary verbs by answering the questions below (answers are at the bottom of the page).

If you’re having difficulty answering the questions, you can refresh your memory on auxiliaries and other topics by visiting the grammar section.

answers :   1. are   2. do   3. did   4. have    5. have   6. do/don’t   7. had    8. isn’t    9. has/hasn’t    10.  was/wasn’t