3)Chia đúng các động từ sau ở thì quá khứu đơn và thì quá khứu tiếp diễn:
1,He (sit) was sitting in a bar when I (see) saw him.
2,When I (go) was going out, the sun (shine) shined
3,The light (go) went out while I (have)was having tea.
4,When it (rain) was raining, she (carry) carried an umbrella.
5,We (walk) were walking to the station when it (begin) began to rain.
6,He (teach) has taught English for 2 months when he (live) was living in Germany and (work) working as journalist.
7, The house (burn) was burning fast,so we (break) broke the window to get out.
8, He (eat) was eating three sandwiches while you (talk) were talking to him.
9, The servant (drop) dropped two cups while she (wash up) was washing up last night; neither of them (break) was broken
10,While he (write) was writing a letter, the telephone (ring) rang; as he (go) went to answer it, he (hear) heard a knock on the door; the telephone (still,ring) was still ringing while he (walk) was walking to the door, but just as he (open) opened it, it (stop) stopped