名词性从句知识点(大全)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. AsB. WhatC. ItD. 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．While some behaviors may seem strange to you, remember you consider normal probably seems just as unusual to others.A. it; thatB. what; thatC. that; whatD. which; that【答案】 C【解析】【分析】句意：虽然有些行为对你来说可能很奇怪，但请记住，你认为正常的行为对别人来说可能也不寻常。

第一空为宾语从句，从句结构完整用that起连接作用，第二空为主语从句，从句中consider缺少宾语，应该用what，故选C。

【点评】考查名词性从句，本题涉及that引导的宾语从句和what引导的主语从句。

3．It has been pointed out ________ plays a vital role in driving away one's anxiety is one's sweet childhood memories.A. what thatB. whichC. thatD. that what【答案】 D【解析】【分析】句意：有人指出，驱除焦虑所起着至关重要的作用是童年美好的回忆。

本句时一个主语从句，it作形式主语，真正的主语为that what plays a vital role in driving away one's anxiety is one's sweet childhood memories.，主语从句中又有一个主语从句，且此主语从句中缺少主语，所以用what引导。

故选D。

【点评】考查名词性从句，本题涉及what引导的主语从句。

4．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; whetherB. focused; ifC. has focused; whetherD. 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.5．Located between the 16th and the 18th f loor, ______ I call my “home” is more like a “bird's nest”.A. whichB. thatC. whatD. where【答案】 C【解析】【分析】考查主语从句。

What引导主语从句______ I call my “home”且 What在从句中充当call的宾语。

故选C。

6．____ he will offer us enough help doesn't matter a lot to our success.A. IfB. WhetherC. BeforeD. How【答案】 B【解析】【分析】句意：他是否提供帮助对于我们的成功没有什么关系。

If不可以引导主语从句，故选B。

【点评】考查名词性从句，本题涉及whether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. itB. whichC. thatD. 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．_______ is troubling me is ______ I don't understand ________ he saidA. What; that; whatB. What; what; whatC. That; that; whatD. Why; that; which【答案】 A【解析】【分析】句意：我烦恼的是我不明白他说的话。

第一空是主语从句，从句中缺主语，要用What；第二空是表语从句，从句不缺成分，所以要填that；第三空是宾语从句，从句中的动词understand缺宾语，要填what。

故选A。

【点评】考查名词性从句，本题涉及主语从句，表语从句和宾语从句的应用。

9．It was he said disappointed me.A. that; whatB. what; thatC. that; whichD. 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。

10．_______ caused the accident has not been found out yet.A. WhatB. WhichC. The thingD. That【答案】 A【解析】【分析】句意：造成事故的原因还没有查明。

此处为主语从句，从句中缺少主语，应该用what引导，故答案为A。

【点评】考查主语从句。

以及what的含义。

11．Is this school they visited the other day?A. thatB. whichC. whereD. the one【答案】 D【解析】【分析】句意：这就是几天前他们参观的那间学校吗？根据 Is this school they visited the other day? ，可知主句中缺表语，应用the one指代this school；再根据they visited the other day? ，可知在the one后边紧跟的是that引导的定语从句，that句中做visit的宾语故省略。

故选D。

【点评】考查表语从句和定语从句。

注意关系词that在从句中做宾语时可省略。

12．_________ is known to all is that the earth is smaller than the sun.A. AsB. WhatC. ItD. Which【答案】 B【解析】【分析】句意：众所周知，地球比太阳还小。

复合句的主语是一个名词性从句，从句没有引导词和主语，表示“所……的（事）”，故用what引导，其双重作用，故选B。

【点评】考查名词性从句，本题涉及what引导的主语从句。

13．_____Macao has achieved shows _____"one country, two systems" principle is the best solution to the Macao and Hongkong question, left by history.A. That; whatB. What; thatC. What; whatD. That; that【答案】 B【解析】【分析】句意：澳门取得的成就表明，“一国两制”原则是解决历史遗留下来的澳门和香港问题的最好办法。

分析句子可知，_____Macao has achieved为主语从句，从句中achieve缺少宾语，所以第一个空用what来充当宾语。

再分析句子可知，shows后接宾语从句，从句句意和结构完成，所以第二个空应填连接词that。

故选B。

【点评】考查名词性从句，本题涉及what引导的主语从句和that引导的宾语从句。

14．It that everyone to laugh．A. seems，lovesB. seem，loveC. seems，loveD. seem，loves【答案】 A【解析】【分析】句意：好像每个人都喜欢笑。

It seems that...好像，似乎，that引导的主语从句，it为形式主语；love to do sth.喜欢做... 根据句意故选A 。