专项训练 名词性从句专项讲解及练习含答案解析

专项训练名词性从句专项讲解及练习含答案解析

一、初中英语名词性从句

1．In the past decade, our education system too much on grades. However, grades have a direct connection with future success is still a question.

A. focused; whether

B. focused; if

C. has focused; whether

D. has focused; if

【答案】 C

【解析】【分析】考查时态和主语从句。根据In the past decade,在最近的几十年里，可知句子用现在完成时态，our education system是句子的主语，单数形式，所以第一空填has focused；第二空是主语从句做主语，if是否，不能引导主语从句，所以第二空填whether。故选C。

【点评】主语从句主要有三类：

1）（1）由连词that引导的主语从句:引导词that无含义,在句中不做成分,不可以省。例如：That you will win the medal seems unlikely.你想获得奖牌看起来是不可能的。（2）用连词whether 引导的主语从句:whether有含义（是否）,在句中不做成分,不可以省。例如：Whether she is coming or not doesn't matter too much.她来不来都无关紧要。注意：if不能引导主语从句。

2）用连接代词引导的主语从句（在由连接代词who, whose, whom, which, what, whoever, whomever, whichever, whatever引导的名词性从句中，其连接代词在句中起名词性作用，担当一定成分）.例如：What you need is more practice.你所需要的是更多的训练。

3）用连接副词when, where, why, how引导的名词性从句（其连接副词有含义,在句中作状语。）例如：Where we should leave it is a problem.

2．It was he said disappointed me.

A. that; what

B. what; that

C. that; which

D. which; that

【答案】 B

【解析】【分析】句意：正是他说的话让我很失望。这是一个强调句型,"it is/was that..."是固定搭配,"what he said"是被强调部分, 你可以发现去掉"it was that"后, 句子仍然完整。"what he said"做主语,主语从句中"said"缺宾语用what补足，故选B。

【点评】考查主语从句的强调形式。

3．________ 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。

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

A. that

B. it

C. what

D. which

【答案】 C

【解析】【分析】句意：他们在森林里迷路了，更糟糕的是天开始黑了。根据连词and可知，本句需要一个引导主语从句的连接词，该词同时还要能在从句里充当主语。that不能在句中作成分；it不能引导主语从句；which意为“哪一个”，不符合本句语境。排除A、B、D三项。故选C。

【点评】考查名词性从句，本题涉及what引导的主语从句的应用。

5．______ is our belief that improvements in health care will lead to a stronger, more prosperous economy.

A. Which

B. What

C. It

D. As

【答案】 C

【解析】【分析】句意：医疗保健的进步将促进一个更强大、更繁荣的经济，这是我们的信念。that引导的是主语从句，故空格处应该用it作形式主语，代替真正的that引导的主语从句。故答案选C。

【点评】考查it的用法，以及主语从句的应用。

6．________ 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。

7．_______ you don't like him is none of my business.

A. What

B. Who

C. That

D. Whether

【答案】 C

【解析】【分析】句意：你不喜欢他，跟我没有什么关系。you don't like him为主语从句，其内容已经是完整的，所以用that，且引导主语从句的that不能省略。