1. He ……………………… (wash) his car last Saturday.
2. He ………………………. (wash) his car at the moment.
3. He often………………… (wash) his car.
4. We ……………………….. (buy) the chair a month ago.
5. They ………………….. (make) friends when they………………. (be) little children.
6. She……………………….. (do) a grammar exercise now.
7. She is a pupil. She often …………… (do) grammar exercises.
8. She……………………………(do) the exercise an hour ago.
9. His grandfather …………….. (work) at the circus when he ……………………. (be) young.
10. Don’t ask him any questions now. He …………….., (work).