高中名词性从句专练一.概念：在句子中起名词作用的句子叫名词性从句。名词性从句的功能相当于名词词组，他在复合句中能担任主语、表语、宾语、同位语等因此根据它在句中不同的句法功能，名词性从句共分为四种:主语从句,表语从句,宾语从句和同位语从句。分句置于句首时，that绝对不可以省略。Whether引导的主语从句常置于句首。连系动词“appear,look,seem”的两个常用句型Itseems/appearsthat…
高中名词性从句专练?一.概念：在句子中起名词作用的句子叫名词性从句名词性从句的功能相当于名词词组，他在复合句中能担任主语、表语、宾语、同位语等因此根据它在句中不同的句法功能，名词性从句共分为四种:主语从句,表语从句,宾语从句和同位语从句，下面我们就来聊聊关于高中名词性从句专练?接下来我们就一起去了解一下吧!
高中名词性从句专练
一.概念：在句子中起名词作用的句子叫名词性从句。名词性从句的功能相当于名词词组，他在复合句中能担任主语、表语、宾语、同位语等因此根据它在句中不同的句法功能，名词性从句共分为四种:主语从句,表语从句,宾语从句和同位语从句。
二.相关知识点精讲
1． 主语从句：主语从句在整个句子中作主语。
(1)that不同于其它的连词，它不充当句子的成分，只是单纯的连接词，通常不可以省略。分句置于句首时，that绝对不可以省略。
That the driver could not control his war was obvious.
It was obvious that the driver could not control his car.
(2)if 不能用在主语从句中，而是用whether。Whether引导的主语从句常置于句首。
Whether he left (or not) is unknown
(3)当主语从句作主语时，谓语动词一般用第三人称单数，下面这个句型例外。
What we need is more time and money. What we need are many more books.
2.表语从句：表语从句出现在系动词后，充当表语。引导表语从句的连接词主要有：that，whether，wh-类连接词。
The trouble is that we are short of money. Go and get your coat. It’s where you left it.
(1) 引导表语从句除了上述三类词外还有because
That’s because he didn’t understand me。It’s just because he doesn’t know her。
(2) as /as if/ as though也引导表语从句。此类表语从句常跟在特定的动词后面，如“appear, look, seem，taste，sound，feel”等。
Things are not always as they seem to be。It sounds as if someone is knocking at the door。
At that time，it seemed as though I coundn’t think of the right word。
(3) 连系动词“appear, look, seem”的两个常用句型
It seems/appears that….
It looks/seems as if/as though……(与事实相符用陈述语气，与事实相反用虚拟语气)
3. 宾语从句：及物动词，形容词和介词后加宾语从句作其宾语。
(1) 宾语从句时态与主句相呼应，但宾语从句表示的是客观真理或普遍现象除外
The teacher told us that the earth moves around the sun
(2) 连词whether和 if引导宾语从句可以互换，但注意：
l 连词后紧跟or not时用whether I want to know whether or not they will come.
l 作介词宾语是用whether引导宾语从句 He was interested in whether he saw her there.
l 连接词后直接加不定式，不能用if只能用whether
He doesn’t know whether to stay or not.
l 如果宾语从句是否定时，一般用if引导 I care if he will not attend the meeting.
(3) 当宾语从句后带宾补时，要用“主语 谓语 it宾补 that-clause, that不可省略
I think it certain that she will do well in her exam.
(4) 当主语是I, we ，主句用think, believe, suppose, expect, imagine五个动词时，用否定转移 I don’t think he will win the game, will he?
(5) that在宾语从句常可以省略，但由and或 but连接两个或多个宾语从句时，仅可以省略第一个连词that
He said (that) he had eaten nothing but that he wasn’t hungry.
(6) 注意区别if引导的宾语从句和条件状语从句
I don’t know if he will come. If he comes, I’ll let you know.
4.同位语从句，在句中作某些名词的同位语，对前面的名词进一步说明。用在下列名词 fact,news,idea,hope,believe,hope,thought,doubt.truth,order,suggestion, word etc.
(1) There is no doubt that he will come. There is doubt whether he will come.
Word came that Napoleon would come to inspect them. There is no possibility that….
(2) that引导的同位语从句与定语从句的区别：
在同位语从句中：that不可以省略，不作成分;定语从句的关系代词that在定语从句作成分，作宾语时可以省略
We are interested in the news that some foreigners would visit our school.
We are interested in the news that he told us.
when, where引导的同位语从句与定语从句的区别：
在定语从句中，when, where前有分别表示时间、地点的先行词；而在同位语从句中无此对应关系
They have no idea at all where he has gone.(同位语从句)
Go and get your coat. It’s in the place where you left it.(定语从句)
5. 疑问词-ever既可以引导名词性从句，也可以引导让步状语从句，而no matter 疑问词只能引导让步状语从句
No matter where I go, my heart is towards China.
I believer whatever he says. Whatever he says, I will never believe him.
who与 whoever的区别
who是“谁”的意思，表示具有疑问，who相当于anyone who“无论谁”
Whoever leaves the room last ought to turn off the lights.
Can you tell me who that gentleman is?
6．当名词性从句缺少主语、宾语或表语时，引导词通常用what，它相当于。另外，有时具有感叹意义all that, anything that或 the thing(s) that
What we can’t get seems better than what we have.
Tom thought what a beautiful girl Mary was.
7.注意区分it 作形式主语的主语从句与强调句
强调句句型It is/was 被强调部分 that, 去掉It is/was, that，句子仍然成立。
It is natural that they should have different views. 主语从句
It is only lately that he had had a family himself. 强调句
What was it that he wanted? I don’t know what it was that he wanted.
It was in the hotel where he stayed that we discussed the serious problem
8.注意it 作形式主语的主语从句和as引导非限制性定语从句引导的不同
It is known to all that the earth is round. As is known to all， the earth is round.
练习题：
1. I want to be liked and loved for ________ I am inside.
A. who B. where C. what D. how
2. -It’s no use having ideas only.
-Don’t worry .Peter can show you_________ to turn an idea into an act.
A. how B. who C. what D. where
3._________ some people regard as a drawback is seen as a plus by many others.
A. Whether B. What C. That D. How
4. Part of the reason Charles Dickens loved his own novel, David Copperfield, was _______it
was rather closely modeled on his own life.
A. what B. that C. why D. whether
5. -I prefer shutting myself in and listening to music all day on Sundays.
-That’s ________ I don’t agree. You should have a more active life.
A. where B. how C. when D. what
6. News came from the school office ____ Wang Lin had been admitted to Beijing University.
A. which B. what C. that D. where
7. Almost everyone has his own strengths and weaknesses. It is _______ others are weak that maybe you have a great advantage.
A. as B. where C. that D. what
