2017英语考前冲刺Ⅱ专题09 名词性从句突破

　　1. Before a problem can be solved, it must be obvious ______ the problem itself is. (2011·湖南卷31)

　　A. what

　　B. that

　　C. which

　　D. why

　　【解析】选A。空白处后句子缺表语。因此不能选B。B中的that 只起引导作用，无实意。而该句选what既起了引导作用，又作了句子成分表语。

　　2. It is still under discussion ______ the old bus station should be replaced with a modern hotel or not. (2011·重庆卷22)

　　A. whether

　　B. when

　　C. which

　　D. where

　　A. that when

　　B. that if

　　C. if when

　　D. when if

　　【解析】选B。that引导一个宾语从句，宾语从句中又有一个由if引导的条件状语从句。

　　1. that引导名词性从句时既无词义也不在从句中作任何成分。

　　2. that引导主语从句、表语从句、同位语从句时一般不可省，引导宾语从句时常可省。但是， and连接两个由that引导的宾语从句时，第一个that可省，第二个that不可省。

　　3. that从句一般不作介词的宾语。但： in that “因为”， except / but that“除了”例外。

　　考点3.whether, if的用法

　　It's reported that Pakistan is considering ______ to continue its information cooperation with the US because the US didn't inform them in advance before they took action to kill Bin Laden. (2011·成都七中高三最后一套模拟卷)

　　A. what

　　B. how

　　C. whether

　　D. if

　　【解析】选C。在 whether后只能用不定式或后接or not，不能接if，即whether to do 或whether or not。whether, if引导名词性从句时，表示“是否”， 不在从句中作任何成分，二者常可通用，但在下面几种情况下一般只用whether:

　　(1)引导主语从句。

　　(2)引导表语从句。

　　(3)引导同位语从句。

　　(4)在动词discuss之后。

　　(5)在介词之后。

　　(6)后面紧跟or not。

　　(7)动词不定式前。

　　考点4.名词性从句的语序

　　I really wonder ______ will stop Japan from its annual whale hunt in the Antarctic.

　　A. that it is what

　　B. what it is that

　　C. what is it that

　　D. that is it what

　　1. 在名词性从句中，that只起连接主句和从句的作用，在从句中不充当任何成分，本身也没有词义，即从句中不缺少任何成分时用连词that.

　　2. that在从句中作主语时通常用it作形式主语，而将that从句置于句末作真正的主语。但what不能用it作形式主语。

　　3. that可引导同位语从句，但what不能。

　　考点6.由reason作主语时，表语从句的连接词

　　The reason why he can't go to school is ______ he is ill.

　　A. because

　　B. why

　　C. that

　　D. which

　　【解析】选C。reason作主语时，其后的表语从句一般用连词that。

　　reason作主语时，表语从句所用连词为that, 一般不用because或why等。

　　考点7. that引导同位语从句和定语从句的区别

　　例1：______ was known to all that William had broken his promise ______ he would never play computer games again.

　　A. As; which

　　B. As; that

　　C. It; that

　　D. What; that

　　专题训练

　　()1. Why don’t you bring ________ to his attention that you are too busy to do it?

　　A．this

　　B．that

　　C．it

　　D．what

　　()2. The fact ________ he didn’t see Lao Li yesterday is true.

　　A．which

　　B．that

　　C．when

　　D．what

　　()3. The book looks ________ it had been out in the rain.

　　A．that

　　B．whether

　　C．as though

　　D．what

　　()4. I have no idea ________ he will come back.

　　A． where

　　B．when

　　C．what

　　D．that

　　()5. ________ the old man’s sons wanted to know was ________ the gold had been hidden.

　　A．That; what

　　B．What; where

　　C．What; that

　　D．What; if

　　(). What the doctors really doubt is________ my mother will recover from the serious illness soon.

　　A．when

　　B．how

　　C．whether

　　D．why

　　(). Our hometown is quite different from ________ before.

　　A．that it was

　　B．what it was

　　C．which it was

　　D．when it was

　　(). Someone is knocking at the door. Go and see________.

　　A．who is he

　　B．who he is

　　C．who is it

　　D．who it is

　　().________surprised us very much that Tom should have left without a word.

　　A．he

　　B．It

　　C．This

　　D．That

　　()1. Some college students are seen doing ________ work they can find to support themselves.

　　A．that

　　B．which

　　C．whatever

　　D．no matter what

　　()1. Things were not ________ they had been before.

　　A．as

　　B．because

　　C．that

　　D．when

　　()1. After________ seemed an endless effort，the patient was finally able to carry out________ seemed a perfectly normal walk.

　　A. what；what

　　B．that; that

　　C．it; that

　　D．which; like

　　(). He was ill. That is ________ he didn’t come yesterday.

　　A．when

　　B．why

　　C．how

　　D．that

　　1. C　it是形式宾语，真正的宾语是由that引导的从句。

　　2. B　同位语从句说明 fact 的具体内容，用 that 引导，不能省略。that只起连词作用，不作句子成分。