题目内容
13.By the time the bell ____,the boy ____four nice pictures.( )| A. | rang,has drawn | B. | had rung,drew | ||
| C. | was ringing,drew | D. | rang,had drawn |
分析 铃声响起时,那个男孩已经画了四幅漂亮的画了.
解答 答案:D 根据前文By the time到那时为止,通常和完成时连用,分析句子,这里考查过去完成时,即铃声响起是过去发生的,用一般过去时rang,而画四幅画则发生在过去的过去,故用过去完成时,其结构是had done,故选D.
点评 现在完成时指过去的一个动作一直延续到现在,或者过去的动作对现在有影响.例句:He has been to Beijing for ten years.他已经到北京十年了.表延续的动作.通常有时间状语.for加上一段时间,since加上一个时间点.
过去完成时指发生在过去之前,也就是过去的过去的动作.用过去完成时必须有一个表过去的时间做对比.例句:After he had finished his homework,he went to bed.他写完作业以后才去睡觉.
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