1. I (not/go) to Chiang Mai last weekend.
2. My father (wash) his car yesterday.
3. (you/go) to China last year?
4. They (study) Chinese yesterday.
5. She (not/sleep) well last night.
6. (he/help) his mother last night?
7. We (drink) milk last night.
8. (he/swim) in the pool yesterday?
9. You (not/have) a new car.
10. The thief (run) away from the policeman.