II. Choose the correct answer

1. weren't painting

=> last weekend => quá khứ 

2. was cleaning

=> 1 hành động đang xảy ra thì có hành động khác chen vào

3. Were

=> writing => không thể dùng did

4. was fixing

=> 1 hành động đang xảy ra thì có hành động khác chen vào

5. wasn't wearing

=> quá khứ tiếp diễn when quá khứ đơn

6. was

=> quá khứ => dùng was

7. were working

=> my parents số nhiều

8. was walking - tripped

=> quá khứ tiếp diễn when quá khứ đơn

9. were having

1. Were paiting

2. Was cleaning

3. Did

4. Was fixing

5. Wasn't wearing

6. Was

7. Were working

8. Was walking - Tripped

9. Were having

Thì qktd: S + was/were + V-ing:>