I. Chia động từ ở trong ngoặc ở thì quá khứ tiếp diễn để hoàn thành câu.
11. I ____was walking ___ (walk) down the street when it began to rain.
12. At this time last year, I ___was attending____ (attend) an English course.
13. Jim ____was standing____ (stand) under the tree when he heard an explosion.
14. While I __was studying___ (study) in my room, my roommates ____were having____ (have) a party in the other room.
15. Mary and I _____were dancing____ (dance) the house when the telephone rang.
quá khứ tiếp diễn
+S + was/were + V-ing.
- S + was/were + not + V-ing
? Was / Were + S + V-ing?
xin ctlhn