1) were building

2) was driving

3) was chatting

4) was watching

5) was preparing

6) What were you doing

7) Where were you going

8) weren't going

9) wasn't doing

Tất cả những câu trên đều dùng một cấu trúc chung là thì quá khứ tiếp diễn:

$(+)S+was/were + V_{ing} + O$

$(-)S+was/were + not + V_{ing} + O$

$(?)Wh + was/were + S + V_{ing} + O?$ (Wh là những từ để hỏi bắt đầu bằng wh ví dụ what, where,..._)

1. were building.

2. Was driving.

3. Was chatting - was teaching.

4. Was watching.

5. Was preparing.

6. Were you doing.

7. were you going.

8. were not going.

9. was not doing.