题目内容
13.People _____ to set off firecrackers in some areas of Shanghai for several months.( )| A. | aren't allowed | B. | weren't allowed | ||
| C. | won't be allowed | D. | haven't been allowed |
分析 在上海的一些地区已经好几个月不允许放烟花了.
解答 答案:D.结合句意allow sb to do sth,允许某人做某事,允许这个动作发生在过去,持续了一段时间,故用现在完成时,主语people是allow的承受者,构成被动关系,故用现在完成时被动语态have/has+been+过去分词,主语是复数,故have,加上not构成否定,故答案是D.
点评 现在完成时有两种用法1.过去发生的某一动作对现在造成的影响或结果或到现在为止已经发生或完成的动作.2.表示过去发生的、持续到现在的动作或状态.
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