过去进行时表示某个时候或某段时间正在进行的动作 .He ______ a book about China last year, but I don’t know if he ______ it.
A.wrote; has finished
B. was writing; has finished
C. was writing; had finished
D. wrote; will finish
说明:正确选项为B. 从I don’t know if he has finished it.推断,他去年一直在写。
II. 动词的被动语态
常用被动语态 构
成
常用被动语态 构
成
1 一般现在时 am/is/are done 6 过去进行时 was/were being done
2 一般过去时 was/were done 7 现在完成时 have/has been done
3 一般将来时 shall/will be done 8 过去完成时 had been done
4 过去将来时 should/would be done 9 将来完成时 will/would have been done
5 现在进行时 am/is/are being done 10 含有情态动词的 can/must/may be done
注
意
事
项 被动语态的否定式是在第一个助动词或情态动词后加not,短语动词的被动态不可漏掉其中介副词。固定结构be going to,
used to,have to, had better变为被动态时,只需将其后的动词变为被动态。
Trees should not be planted in summer.
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