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为什么填动词这个形式?

来源:学生作业帮 编辑:拍题作业网作业帮 分类:英语作业 时间:2024/05/30 23:03:23
为什么填动词这个形式?
1 He went out without (closing) the door
2 I (chose) some novels and bought them.
3 I'm very busy today,because I have a lotof things (to do)
4 she (was cleaning) the room while the children were playing in the garden
5 When he was young ,he used to (be) a doctor
6 He (has) already (moved) into the new house
7 It's a long (has) it (been) raining?
9 What was he doing when you (saw) him?
10 I used to (go) to work by bus.
1.without 为介词,介词后要用动词ing形式.2.and前后形式一致,bought为过去式,所以choose也要用过去式,即chose.3.我还有很多事要做,to do不定式表示将来.4.while表示同时,要是现在进行时或过去进行时,但时态要一致.5....