题目内容
9..-When your sister come here?-Two years ago.She has been here for two years.( )
| A. | does | B. | will | C. | did | D. | has |
分析 --你姐姐什么时候来的?
--两年前,她在这里已经两年了.
解答 答案:C.考查助动词.句意"--你姐姐什么时候来的?--两年前,她在这里已经两年了.".原句是when+一般疑问句形式的特殊疑问句,句中含有实义动词come,因此变一般疑问句要用助动词.A一般现在时态.B一般将来时态.C一般过去时态,D现在完成时态.根据回答"Two years ago"两年前,可知应该是一般过去时态.用助动词did.答案是C.
点评 助动词,帮助实义动词构成否定句和一般疑问句的,要根据时态,人称等选择正确用法完成试题.
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