必备英语名词性从句专项练习(附答案)

必备英语名词性从句专项练习(附答案)

一、初中英语名词性从句

1． is known to all is that the earth is smaller than the sun.

A. As

B. What

C. It

D. Which

【答案】 B

【解析】【分析】句意：众所周知地球比太阳小。 is known to all 是主语从句，从句中缺少主语，因此用what，选B。

【点评】考查名词性从句，本题涉及what引导的主语从句。

2． is even more important is the earth cooled down, water began to appear on its surface.

A. When; that; when

B. What; whether; as

C. What; that; as

D. lt; whether; as 【答案】 C

【解析】【分析】这题考查从句的用法，第一空填what引导主语从句，在主语从句中what做主语，第二空填that引导表语从句，在表语从句中，as是引导时间状语从句，句意是：甚至更重要的是：随着地球的冷却，水开始出现在表面。选C。

3．--- made her ashamed of herself?

--- the lowest mark in her class.

A. What; Because she got

B. Was it what; Getting

C. What was it that; That she got

D. What was it that; Get

【答案】 C

【解析】【分析】句意：——是什么让她对她自己感到羞愧？——是她获得了她班上的最低分让她惭愧。A中的what是句子的主语，但是because引导的从句不作主语，是原因状语从句，故排除；B的第一空是错误形式，故排除；C、D两项的第一个选项是一样的，说明第一个题干是一个强调句型，特殊疑问句下的强调句型，有what引导；第二个空是对what的回答，因为what是上一句的主语，That she got the lowest mark in her class是从句，可以作主语；而D项的get是动词原形，不能作主语，故答案为C。

【点评】考查强调句型的使用和对特殊疑问句的回答，注意问什么回答什么，也就是说疑问词what是句子的主语，回答的内容也需要在句子中能作主语。

4．________ the weather will not clear up until next week is bad news for us.

A. As

B. If

C. Whether

D. That

【答案】 D

【解析】【分析】考查主语从句。句意：直到下周天气才放晴，这对我们来说是坏消息。此处是that引导的主语从句，that无实义，只其引导作用，故答案为D。

【点评】主语从句属于名词性从句，在名词性从句中，that无实义，只起连接作用，不做

句子成分；if/whether起连接作用，不做句子成分，有实义“是否”。做题时注意看从句是否少成分。

5．________ we may find interesting is that it usually takes more to be polite.

A. That

B. What

C. Which

D. /

【答案】 B

【解析】【分析】句意：我们可能会发现有趣的是通常需要更多的礼貌。此处是主语从句做主语，从句没有引导词，缺少宾语，故答案为B。

【点评】考查名词性从句，本题涉及what引导的主语从句的应用。

6．________ has been proved is that animals and insects have their own languages.

A. What

B. As

C. It

D. That

【答案】 A

【解析】【分析】句意：已被证明的是动物和昆虫有自己的语言。根据is判断，此处为主语从句，分析该从句，缺少主语，用what。选A。

【点评】考查名词性从句，本题涉及what引导的主语从句的应用。

7．They lost their way in the forest, and ________ made matters worse was that night began to fall.

A. it

B. which

C. that

D. what

【答案】 D

【解析】【分析】句意：他们在森林里迷路了，情况更糟糕的是天又黑了。本题中含有一个主语从句what made matters worse，其中的what引导起这个主语从句，同时在主语从句中做主语。故选D。

【点评】考查名词性从句，本题涉及what引导的主语从句的应用。

8．It matters little ______ a man dies, but _____ matters much is ______ he lives.

A. how; what; how

B. how; it; how

C. why; it; why

D. that; what; that 【答案】 A

【解析】【分析】句意：一个人如何死去并不重要，重要的是他如何生活。it为形式主语，how从句为真正的主语。What matters much （=the thing that matters much）。第一个how引导的是一个主语从句；it作形式主语；what引导的是主语从句；第二个how引导的是表语从句。故选A。

【点评】考查名词性从句，本题涉及主语从句和表语从句的应用。

9． is clear to the members of the committee is that the President will not give in to their demands.