名词性从句从句：在一个句子的前面加上一个连接词,这个句子就变成了从句.如果这个从句做了主语,它就是主语从句.其它的以此类推.名词性从句,顾名思义,它具有名词性.所以能够作主语,宾语等等.名词性从句相当于名词，可分别作主句的主语、表语、宾语和同位语。
所以，名词性从句分为主语从句、表语从句、宾语从句和同位从句。
注：1.特殊疑问句本身能够做从句,它不需要加连接词.2.所有的从句要使用陈述语序. 陈述语序：句子第一个词永远是主语;第二个词可能是情态动词\助动词等加上动词,或者是动词本身.（一）引导名词性从句的连接词1、连接代词：who, whose, whom, what, which。
有词义，在从句中担任成分，如主语、表语、宾语、或定语等。
2、连接副词：when, where, why, how。
有词义，在从句中担任成分，作状语。
3、连接词：that, whether, if, as if, that（二）主语从句1、主语从句在复合句作主语。
Who will go is not important.2、用it作形式主语，主语从句放在句末。
句型：It+be+adj./n./V-ed+主语从句It doesn’t matter so much whether you will come or not.3、that引导主语从句时放在句首时，不能省略。
That he suddenly fell ill last week made us surprised.实用例句：Is it true that he will be punished seriously by the headmaster?Does it make any difference who bought these gifts?How strange it is that these children are so quiet!注意：表示是否,只能使用whether.巩固练习：I. 用适当的词填空，使句子意思完整。
1. ______ he didn’t attend the meeting yesterday wasn’t quite clear.2. The Foreign Minister said, “It is our hope ______ the two sides will work towards peace.”3. ______ team will win the match is still unknown.4. ______ comes to the party will receive a present.5. ______ Mary has left is still a question.6. It’s reported ______ three people were killed in the accident and five were hurt badly.7. ______ he solved the problem successfully interested all of us.8. We usually think ______ we can’t get seems better than what we have.9. It is a fact ______ English is being accepted as an international language.10. ______ is to be sent there to solve the problem hasn’t been decided.II. 单项选择1、 The Foreign Minister said, “______ our hope that the two sides will work towards peace.”A. This isB. There isC. That isD. It is2、 After Yang Liwei succeeded in circling the earth, _____ our astronauts desire to do is walk in space.A. whereB. whatC. thatD. how3、 ____ is not known yet.A. When she has goneB. Where she has goneC. How did she leaveD. Why did she go4、 ______ is unfit for the office.A. It seems to me thatB. It seems to me that heC. That seems heD. That seems to him that5、 _______man must fear when traveling in space is radiation from the sun.A. WhichB. HowC. WhatD. That6、 _______ beat Xiao Wang black and blue is not known.A. WhomB. WhoeverC. WhoD. What7、________matters much ________ the headmaster supports our activity.A．It; whether B．What; whether C．As; that D．That; if8、________ is known to us all is that the Chinese government has spared no efforts to protect people from fake food.A．As B．It C．That D．What9、________ Premier Wen Jiabao visited the United States led to the closer relationship between the two countries.A．Which B．What C．That D．As10、It is obvious to the students ________ they should get well prepared for their future.A．as B．which C．whether D．that11、It is uncertain________side effect the medicine will bring about，although about two thousand patients have taken it.A. thatB. whatC. howD. whether12、The villagers have already known ______ we'll do is to rebuild the bridge.A．this B．that C．what D．which13、It is still under discussion________the old bus station should be replaced with a modern hotel or not.A．whether B．when C．which D．where14、________ Barbara Jones offers to her fans is honesty and happiness.A. WhichB. WhatC. ThatD. Whom15、It was never clear ________ the man hadn't reported the accident sooner.A. thatB. howC. whenD. why（三）表语从句1、表语从句在复合句中作表语，位于系动词之后。
The question was who could go there.2、引导表语从句的连接词that有时可省去。
My idea is (that) we can get more comrades to help in the work.注意：表示“是否”,只能使用whether.巩固练习：1. The question is ________ we will have our sports meet next week.A. thatB. ifC. whenD. whether2．The reason why he failed is ________he was too careless.A. becauseB. thatC. forD. because of3. Go and get your coat. It’ s ________you left itA. whereB. thereC. there whereD. where there4．The problem is _________to take the place of TedA. who can we getB. what we can getC. who we can getD. that we can get5. What I want to know is ______ he likes the gift given by us.A. thatB. ifC. whetherD.不填6. The reason is_________I missed the bus.A. thatB. whenC. whyD. what7. That is __ ___ we were late last time.A. thatB. whenC. whyD. what8. She looked _________ she were ten years younger.A. thatB. likeC. asD. as though9.—I fell sick!--I think it is _______ you are doing too much.A. whyB. whenC. whatD. because10. The reason why he hasn’t come is ___________.A. because his mother is illB. because of his mother’s being illC. that his mother is illD. for his mother is ill11. —He was born here.-- That is _______ he likes the place so much.A. thatB. whatC. whyD. how12.That is ______ Lu Xun once lived.A. whatB. whereC. thatD. whythat/what的区别1．_______your father wants to know is________ getting on with your studies.A. What; how are youB. That；how you areC. How；that you areD. What；how you are2. The trouble is__________we are short of tools.A. whatB. thatC. howD. why that3. America was __________was first called “India” by Columbus.A. whatB. whereC. the placeD. there where4. China is becoming stronger and stronger. It is no longer_________ .A. what it used to beB. what it was used to beingC. what it used to beingD. what it was used to be5. ________he really means is ________he disagrees with us.A. What … thatB. That … whatC. What … whatD. That … what6. The energy is ________ makes the cells able to do their work.A. thatB. whichC. whatD. such（四）宾语从句1、宾语从句在复合句中作宾语。