2017年的高考已经结束，对于准高三的同学们来说，高考的战斗号角已经吹响，一轮复习马上就要开始，小编给大家搜集了英语一轮复习需要的名词性从句，希望对大家有所帮助哦~

　　名词性从句(一)

　　名词性从句包括主语从句、宾语从句、表语从句和同位语从句四种。

　　引导名词性从句的连接词可分为三类：

　　连词：that, whether, if (在从句中均不充当成分)。

　　连接代词：what, whatever, who, whoever, whom, which, whichever。

　　连接副词：when, where, how, why, whenever, wherever, however等。

　　注意：that在从句中不作成分，在主语从句、表语从句、同位语从句中也不能省略，在引导宾语从句时，第一个宾语从句中的that可以省略;whether和if意为“是否”，在宾语从句中可以互换使用(注介词后面的宾语从句只能用whether引导)，但在其他名词性从句中只能用whether。从句均用陈述语序。

　　一、主语从句

　　1.主语从句：在复合句中充当主语成分的从句。

　　That he passed the driving test made us very happy.

　　Who will take over the company has not been decided yet.

　　2.为了防止一些句子头重脚轻，通常用it作形式主语。

　　用it作形式主语的常用句型

　　It is a fact (a shame, a pity, good news...) that...

　　It is true (certain, clear...) that...

　　It is said (reported, believed...) that...

　　It+occurs/matters等不及物动词+that从句

　　It is certain that you will pass the college entrance exam.

　　It is a pity that I missed the party held last night.

　　It is reported that the accident was caused by carelessness.

　　It had never occurred to him that he might be falling in love with her.

　　二、宾语从句

　　1.宾语从句：

　　在复合句中充当宾语成分的从句。分为及物动词的宾语从句，介词的宾语从句，形容词后的宾语从句。

　　Do you know who has got the first prize?

　　We are talking about whether we admit students into our club.

　　I am sure I will pass the exam.

　　2.it作形式宾语

　　常用的动词有：find, make, feel, think, consider等。

　　I find it necessary that we do some reading every day.

　　3.有些动词不能直接跟宾语从句，需要借助形式宾语it。

　　常见的有like, dislike, hate, love, enjoy, appreciate等。

　　I hate it when people speak with their mouths full.

　　I would appreciate it if you could stay for lunch.

　　4.在suggest, demand, insist, order, wish 等动词后的宾语从句中， 谓语动词要用虚拟语气，即 (should+)动词原形。

　　She suggested that we (should) not go there for holiday.

　　名词性从句(二)

　　三、表语从句

　　1.表语从句：

　　在复合句中充当表语成分的从句。通常位于be动词或系动词look, seem等之后。

　　The problem is when we can get a pay rise.

　　That is what I want to tell you.

　　2.表语从句可以用as if/though 引导，“好像……”。

　　It looks as if it is going to rain.

　　3.because引导的表语从句强调原因，而why引导的表语从句强调结果。

　　That's because he doesn't understand me.

　　He was ill. That's why he was absent.

　　4.“The reason why...+be+that从句”结构。

　　The reason why he was absent was that he was ill.

　　四、同位语从句

　　1.同位语从句：

　　在主从复合句中，用作同位语的从句，叫同位语从句。它一般跟在某些名词，如：fact, idea, news, promise, doubt, truth, hope, suggestion, belief等后面，用以解释说明这些名词。

　　I have no idea when Chaplin's film will be on again.

　　We were very excited at the news that our team had won.

　　The fact that women can work as well as men is clear.

　　Henry Adams made a promise that he would not open the letter until 2 o'clock.

　　2.同位语从句与名词之间有时会被句子的其他成分隔开，形成间隔性同位语从句。

　　Word came that our team had won the game.

　　3.that引导的同位语从句与定语从句的区别：

　　同位语从句只是说明或解释前面名词的具体内容，从句中引导词不充当从句成分;定语从句用来修饰前面的名词或代词，关系词在从句中既起到连接作用，又在从句中充当成分。

　　Have you heard the news that our team won the game? (同位语从句)

　　Have you heard the news that was reported from the front?(定语从句)

　　注意：whether和if引导宾语从句时大多数情况下可以通用，但其他情况下二者还是有的区别。

　　下列情况下一般用whether不用if：

　　①引导主语从句、表语从句、同位语从句时;

　　②引导介词或discuss的宾语从句时;

　　③与or not连用时。