题目内容
8.While Jim ______the floor,someone ______at the door.( )| A. | was sweeping,was knocking | B. | was sweeping,knocked | ||
| C. | swept,was knocking | D. | swept,knocked |
分析 当吉姆在扫地的时候,有人在敲门.
解答 答案:A.结合while可知表达的两个动作同时进行,表达的是过去正在进行的动作,故用过去进行时was/were+doing,故答案是A.
点评 在复合句中,如果主要动作和背景动作都是延续的或同时发生的,那么主从句的动词都可用过去进行时.例如:While he was waiting for the bus,he was reading a newspaper.他边等车边看报.(两个动作都是延续的) He was cleaning his car while I was cooking.他擦车时我在做饭.(两个动作同时进行)
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