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高考英语名词性从句九大高考热点分析

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高考英语名词性从句九大高考热点分析
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名词性从句九大高考热点分析

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,因此具有句子的结构特点(即有一套主谓成份);同时又具有名词性特点,所以可以在复合句中作主语、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。我们必须弄懂和掌握以下热点问题。

一、连接词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

____ we can't get seems better than ____ 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:

____ 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 the former Iraq president Saddam was captured has been proved.

二、连接词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:

____ 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,所以答案是C。但是在宾语从句中表达"是否"既可用if也可用whether。

三、名词性从句的语序。

与别的从句一样,名词性从句必须用陈述语序。例如:

No one can be sure ____ in a million years.

A. what man will 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:

You can't imagine ____ when they received these nice Christmas presents.

A. how they were excited      B. how excited they were

C. how excited were they      D. they were how excited 

解析:答案是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、形式主语、形式宾语。

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。

动词后接复合宾语,也可用it作形式宾语。例如:

____ 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, believe, feel等动词后常带复合宾语。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:

It is generally considered unwise to give a child ____ he or she wants.

A. however    B. whatever     C. whichever    D. whenever

解析:答案是B,whatever引导一个宾语从句,并且作wants的宾语。这里的whatever不能改成what,因为题意想表达的显然是"无论孩子要什么就给他/她什么事不明智的",具有泛指的概念。同时要注意,这里whatever也不能改用no matter what,因为后者只能引导状语从句。又如:

____ has helped to save the drowning girl is worth praising.

A. Who    B. The one    C. Anyone    D. Whoever

解析:答案是D,whoever意为"无论谁",表泛指。比较下例:

I can't remember at the moment who has said the words. (这里的who表特定的某人)

六、Where, when, why等连接副词引导的名词性从句。

Where, when, why等连接副词也可以引导名词性从句,使用的关键是:这个词必须符合句子的逻辑意义要求。例如:

-I drove to Zhuhai for the air show last week.

-Is that ____ you had a few days off?

A. why     B. when     C. that     D. where 

解析:答案是A,why引导的从句作表语,同时why在从句中作原因状语。这里之所以选why,而不是when或 where等,唯一的依据便是句子的逻辑含义,及语境。又如(MET94);

-Do you remember ____ he came?

-Yes, I do, he came by car.

A. How     B. when     C. that     D. if

解析:答案是A,从答语 "he came by car"可知这里问的是"he"来的方式,所以用how引导。

七."介词+who(m)引导的宾语从句"与"介词+ whom"引导的定语从句的区别。

介词后面的引导词用主格还是宾格,决定于它在宾语从句中作主语还是宾语。例如:

It was a matter of ____ would take the position.

A. who    B. whoever     C. whom     D. whomever

解析:答案是A。这是一个含宾语从句的复合句,作介词of宾语的,是后面的整个句子,而不是宾语从句的引导词,由于这里引导词在从句中作主语,所以要用主格who(作宾语时自然要用whom)。比较下例:

Our country has thousands of excellent scientists, most of whom have received higher education at home.

这是一个"介词+关系代词"引导的定语从句;引导定语从句的是"most of+关系代词"而不只是这个关系代词,同时这个引导词又作介词of的宾语,所以要用宾格whom。(注意与介词后面的宾语从句的引导词的用法进行比较和区别。)

八、连接词that的省略。

引导宾语从句时,that通常可以省略,但引导主语、表语和同位语从句时,that不能省。例如:

China's success in manned-spacecraft travel shows ____ our country has become one of the greatest powers in space research. 

A. what    B. which    C. 不填    D. it that

解析:该句中的从句作shows的宾语,是宾语从句,又因为从句中不缺主、宾语,所以只能用that引导;又因引导宾语从句时that可以省略,所以答案是C。

九、同位语从句引导词where, when的用法特点。

说明先行词内容的同位语从句的引导词where, when与被说明的名词在概念上不一致。但引导定语从句的引导词却必须保持一致。是比较:

Then arose the question ____ we were to get so much money.

This the house ____ the great man Mao Zedong was born 110 years ago.

A. where    B. that    C. about which    D. in which

解析:答案分别是(1) A (2) A/D。先行词与where, when概念一致时,是定语从句,(2)中的house与where同表地点,且这个关系副词where或when可以用"介词+which"的形式代替,所以答案A 和D都可以引导。(1)题中的question与where不表同一概念,可见是同位语从句,所以where不能改用"介词+which"的形式。






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