| A. | have sent | B. | sent | C. | have been sent | D. | will be sent |
分析 三封信已经发给她了,但是还是没有回复.
解答 答案:C.
结合句意,信件的发出send发生在过去,对现在造成一定的影响,故用现在完成时主语three letters是动词send的承受者,构成被动关系,故用现在完成时的被动语态have+been+过去分词,主语是复数,故have,send的过去分词sent,故答案是C.
点评 现在完成时的被动语态的肯定式为:have/has+been+done.如:
The experiment has been done successfully.这个实验做得很成功.
现在完成时的被动语态的否定式为:have/has+not+been+done.如:
Tom's novel has not been published.汤姆的小说还没有被出版.
现在完成时的被动语态的一般疑问句需将have/has提到主语的前面.如:
Has his bike been repaired?他的自行车修好了吗?
现在完成时的被动语态的特殊疑问句为:疑问词+have/has+been+done?如:
Who has been invited?谁受到了邀请?
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