3.一般认为,疑问词总是放在句首的,但是否也可以放在句中呢?当然像I don\'t know what to do这样把what放在句中无疑是对的,但是可以说Who said what to whom?这样的句子吗?
本节搜集了部分典型的同学们容易出错的死角知识题,详解于后。
1.你知道as和while的这一点区别吗
I\'m going to the post office. _____ you\'re there, can you get me some stamps?
A. As B. While C. Because D. If
此题从句意看,A和B均可以填,因为它们均可用来引导时间状语从句,表示当的时候,于是一些同学便随便从A、B中选择一项。结果是:选A者错误,选B者正确。为什么呢?因为as和while在引导时间状语从句表示当的时候时,有一定的区别:as所引导的从句谓语通常应是那些表示动作或发展意义的动词,不能是be (是,在), have (有),like (喜欢),belong (属于)等表示状态或静态意义的动词;而while则无此限制。所以此题的最佳答案是B而不是A。请再看例句,答案均选while,不选as:
(1) _____ you are at home alone, please don\'t leave the door open.
A. While B. As C. Before D. How
(2) _____ you are alone with her, tell her that you like her.
A. While B. As C. After D. How
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