7.(2014重庆一中高三下第三次月考)7. John enjoys football but he knows the fact _____ he doesn’t have _____ it takes to be a professional.

  A. that; that
B. which; what
C. what; that
D. that; what

[考点]考察名词性从句

[答案]D

[解析]本题第一空是一个同位语从句that he doesn’t have _____ it takes to be a professional.

在这个同位语从句中that是一个连接词,在句中不充当任何成分,只起引导和连接的作用;第二空引导的是一个宾语从句,在这个宾语从句中it是形式主语,真正的主语是后面的不定式to be a professional, what既是这个宾语从句的引导词,也是take的宾语。故D正确。

[试题延伸]名词性从句要使用陈述语序。同时考查集中在引导词的选择上,连接词that, whether, if在句中不充当任何成分,只起连接作用;连接代词who(ever), which(ever), whom(ever),whose(ever),what(ever)在句中做主语,宾语,表语和定语;连接副词when, why, where, how,在句中做状语。应从上下句的句法关系着手分析,切不可‘望句形生答案’总的来说,考生在解答此类题型时,可用排除法,造句法或者还原法,造句法就是仿造原句的语法功能仿造出一个易懂易理解的句子,帮助判断。

[举一反三]ome children want to challenge themselves by learning a language different from ______ their parents speak at home.

A. what           B. that           C. which          D. one

〖答案〗A

〖考点〗考查宾语从句。

〖解析〗句中的from缺少宾语, what既引导了宾语从句, 又充当了speak的宾语。

2.(2014年北京市西城区高三5月二模试题)23. It’s been discovered in the study ______ people are more relieved after forgiving others.  

  A. that       B. what        C. which        D. whose  

[考点]考察主语从句

[答案]A

[解析]本句中的it是形式主语,that引导的是真正的主语从句,that在这个主语从句中u充当任何成分,只是一个引导词而已。句意:在研究中人们已经发现在原谅别人以后人们更加宽慰。BCD三项都要在句中做成分的。故A正确。

[试题延伸]主语从句是在复合句中充当主语的从句,通常放在主句谓语动词之前或由形式主语it代替,而本身放在句子末尾。解答这类题目,关键在于分析清楚句子结构。通过判断引导词在从句中所作的成分及意义,来选择正确的引导词。连接主语从句的从属连词主要有that, if, whether,和疑问词(what how where when ...)。that引导表示陈述句的主语从句,if和whether,whether...or not引导表示“是否”,引导一般疑问句。连接代词主要有who,whom,whose,what,whoever,whomever,whosever,whatever,whichever等。

[举一反三]It suddenly occurred to him    he had left his keys in the office.

   A.whether  B.where   C.which   D.that

[答案]D 

[考点]考察名词性从句当中的主语从句。

[解析]it作形式主语,真正的主语为that he had left his keys in the office。且that在句中无意义,并不充当任何成分。

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