名词性从句十大考点及热点问题人教版-高三复习.doc
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1、名词性从句十大考点及热点问题名词性从句包括主语从句、宾语从句、表语从句和同位语从句。因为它是从句,因此具有句子的特点,有主、谓成份;同时又具有名词性特点,所以可以在句子中作主语、宾语、表语或同位语。名词性从句是中学英语学习的重点,也是高考的主要考点之一。无论是从高考的角度,还是从英语学习本身来讲,名词性从句的以下知识,都是我们必须弄懂和掌握的重点和热点问题。一、引导词what与that的用法区别。引导主、宾、表语从句时,what要充当主语、宾语或表语等句子成分,that不作任何成分,只在语法上起连接的作用。例如(NMET96):_ we cant get seems better than _
2、 we have.A. What; what B. what; that C. That; that D. That; what解析:本句包含一个主语从句和一个宾语从句,且两个从句都缺乏宾语,可见两个引导词都必须充当成分,所以答案是A。又如(上海高考98):_ caused the accident is still a complete mystery.A. What B. That C. How D. Where解析:该题答案是A,what在主语从句中作主语,即作谓语动词caused的执行者。在下面的例句中,that不充当任何成份,只起语法连接作用(因为句子本身不缺成分): That th
3、e former Iraq president Saddam was captured has been proved.二、 引导词whether和if的用法区别。通常,引导主语从句、表语从句和引导同位语从句时,要用连词whether,不用if;习惯上也只能说whether or not,而不说if or not。例如(MET92):_ the 2000 Olympic Games will be held in Beijing is not known yet.A. Whenever B. If C. Whether D. That解析:试题中的从句位于句首,不难知道这是一个主语从句,所以答
4、案是C。但是当宾语或主语从句为否定句时,只能用if引导,不能用whether引导。例如(上海高考题92):_ you dont like him is none of my business.A. What B. Who C. That D. Whether答案是C,that不充当句子成分,只起连接作用。由于该主语从句是否定句,所以不能用whether引导。三、 名词性从句的语序。与别的从句一样,名词性从句必须用自然语序,即使在疑问句中,从句也不倒装(而在主句上倒装)。例如(MET91):No one can be sure _ in a million years.A. what man w
5、ill look like B. what will man look like C. man will look like what D. what look will man like解析:由于从句不能倒装,所以答案只能是A。又如(上海高考题94):You cant imagine _ when they received these nice Christmas presents.A. how they were excited B. how excited they wereC. how excited were they D. they were how excited 解析:答案是
6、B。同时还须注意,从句的引导词必须始终置于句首,而且how和被修饰的词excited不能分裂开。四、 形式主、宾语。当主语从句较长,而谓语较短时,常常将从句后置,而用it作为形式主语,置于句首。形式宾语也只能用it。例如(MET95):_ is a fact that English is being accepted as an international language. A. There B. This C. That D. It解析:所需词至于句首,同时后面有that-从句(逻辑主语),可见这里应该用形式主语it,所以答案是D。think, find, consider, belie
7、ve, feel等动词后常可以带it作形式宾语。例如:Many people think it possible that a trade war between EU and the States will happen.五、 Who / whoever, what / whatever等的用法区别。一般说来,what/who等含特指意义,而whatever/whoever等含泛指意义,意为“无论什么/无论谁”。例如(NMET97):It is generally considered unwise to give a child _ he or she wants.A. however B
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