表语从句和同位语从句复习素材知识点精析精练
表语从句
常由连接词
that, whether；
连接代词who,whom,whose, which, what,whoever, whomever,whichever, whatever；
连接副词when，where,how,why引导。
1. 连接词引导
① The reason for his absence is that he hasn’t been informed.
他缺席的原因就是他没接到通知。
② The question remains whether they will be able to help us．
问题还是他们能否帮我们。
2. 连接代词和连接副词引导
① The problem is who will take charge of this shop．

问题是谁将接管这家店铺。

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② That is when I realized the importance of journalism．
那时我才意识到新闻工作的重要性。

同位语从句
同位语从句在句子中作某一名词的同位语，一般位于该名词之后，说明该名词的具体内容。这些名词常见的有idea, fact,news, hope, belief,thought,doubt,promise,suggestion,order等。
1. 通常用连词that引导同位语从句，that无词义，也不作句子成分，但不能省略。注意从句用陈述句语序。如：
① They expressed the hope that we would go and visit Shanghai again．他们表示希望我们再去访问上海。
② I have no idea that she quit her present job．
我不知道她辞掉了现在的工作。
2. 同位语从句还可以用whether，when，where，why，how等引导。如：
① The student asked me the question whether the book was worth reading．学生问了我这个问题：这本书是否值得一读。
② I have no idea why he was excited at that time．
我不知道当时他激动的原因。

1. We haven’t settled the question of _______ it is necessary for him to study abroad.
A. if B. where C. whether D. that
2.  A warm thought suddenly came to me _______I might use the pocket money to buy some flowers for my mother’s birthday.
A. if            B. when        C. that        D. which
3. There is much chance _______ Bill will recover from his injury in time for the race.
A. that          B. which          C. until            D. if
4.  Please remind me _______ he said he was going. I may be in time to see him off.
A. where      B. when      C. how      D. what
5．How much one enjoys himself travelling depends largely on________he goes with，whether his friends or relatives.
A．what  B．who  C．how  D．why
1. C  【解析】whether引导的从句构成与名词the question的同位语。(原答案似乎有误)
2. C  【解析】主句完整,同时从句也不缺成分。根据句意可看出that引导的从句构成与a warm thought的同位语。
3. A  【解析】that引导同位语从句，具体说明chance（可能性）的内容。
4. B  【解析】句意：请提醒我他说他将什么时候走。
5. B 【解析】句意为：一个人在旅游中的高兴程度在很大程度上取决于他是和谁一起去的，不管是他的朋友还是亲戚。介词on后跟宾语从句，从句中缺少介词with的宾语，应用连接代词，排除C、D两项；由句意知应选B项。

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