1. They were working on their project at 2 p.m yesterday (work on s.th; at 2 p.m yesterday: QKTD)

2. We were studying English at this time last week (at this time last week: QKTD)

3. Which dress did she wear at the party last night? (last night: QKĐ)

4. No one was sleeping at this time yesterday (No one là đại từ bất định nên coi là S số ít; at this time yesterday: QKTD)

5. Some girls argued outside the shop yesterday (yesterday: QKĐ)

6. Was Jim reading a book or was he watching TV at 4 p.m yesterday?

7. My parents were looking forward to a vacation at this time last year (at this time last year: QTTD)

8. My bother and I were building a tree house this time last year (at this time last year: QKTD)

thì Quá Khứ Tiếp Diễn : 

+S + was/were + V-ing.

- S + was/were + not + V-ing

? Was / Were + S + V-ing?

xin ctlhn