1、主语从句,一整个句子充当主语的叫主语从句. 主语从句通常由从属连词that，whether和连接代词what，who，which，whatever等以及连接副词how，when，where，why等词引导。连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。友情提醒:that在句中无词义，只起连接作用,但一般不能省略掉如: 他赢得比赛这事情很振奋人心. That he won the game is exciting =It is exciting that he won the game,40 _ he doesnt like them is very cle
2、ar. A What B That C Which D Where 37 _ you go or stay at home wont make any difference. A If B When C That D Whether,有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下：（1） It + be + 名词 + that从句 如:It is a pity that we wont be able to go to the south to spend our summer vacation.
3、（2）It + be + 形容词 + that从句 如: It is strange that he should do that. （3）It + be + 动词的过去分词+ that从句It is known to all that the earth moves around the sun. （4）It + 不及物动词 + that 从句 It seems that he has seen the film It happened that he watched the film before.,小建议:,1.主语从句中that 不能省略. 2.主语从句中不能用if 来引导. 3.主语
4、从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有： It is necessary (important, natural, strange, etc.) that It is necessary that we should study hard. It is suggested (requested, proposed, etc.) that It is suggested that we should start early. 4.如果主语从句不缺成分，从句又在句首,那么that不能省略.如 That China held
5、 a successful Olympic Games is exciting.,It is strange that he _ so rude to his friend today. A is B was C should be D will be It is demanded that he _the building as soon as possible. A leaves B leave C leaving D left 39 It is well known_ the earth moves around the sun. A when B why C what D that,小
6、建议:,主语从句作主语相当于单数第三人称作主语，谓语动词用单数， 如: When the meeting will begin has not been decided yet. 如果由and 连接两个或两个以上的主语从句作 主语时，谓语动词用复数； When they will start and where they will go have not been decided yet. When and where the meeting will begin has not been decided.,名词性从句中that 与what 的用法:,That 在名词性从句中不充当成分，Wha
7、t 有充当名词的功能，如 We all know _he is going to win. I dont know _I should buy.,that,what,24. There is a feeling in me _well never know what a UFO is not ever. A that B which C of which D what 38 Is _you told me really true? A what B which C that D when,What 和whatever 的区别,What充当名词,有疑问的含义,而whatever指 “无论什么”=
8、anything that如: I didnt understand _ you said just now. You can take_ you want.,what,whatever,Whoever 和no matter who区别,Whoever 既可以引导名词性从句,又可引导状语从句.而no matter who只能引导状语从句，不能引导名词性从句.whatever ,no matter what其他也一样.如: Whoever breaks the law should be punished. (不能用no matter who,因为这是名词性从句). No matter who
9、(或whoever) breaks the law, he or she should be punished. (这是让步状语从句,所以两个都可以用) _you say, I will believe it. I will believe _you say.,Whatever/No matter what,whatever,同位语从句,同位语从句说明其前面的名词的具体内容。可用于同位语从句的名词有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、
10、suggestion、truth、wish、word等。,They expressed the hope that they would come to visit China again. We all know the truth that the earth moves around the sun. The problem whether it is right or wrong hasnt been decided yet.,同位语从句和定语从句的区别.,在同位语从句中that不充当成分，但是不能省略掉，而在定语从句中that 有充当成分,当宾语的时候可以省略，当主语的时候不能省略.
11、如: The suggestion that we should discuss the problem together was given by him. 同位语从句 The suggestion that he gave us is that we should discuss the problem together. 定语从句,The news _he won the first prize made everyone happy. 同位语从句 The news_ he told us made everyone happy. 定语从句,(04上海春41)Along with the
12、 letter was his promise _he would visit me this coming Christmas.A. which B. that C. what D. whether (04上海春38) The other day，my brother drove his car down the street at _ I thought was a dangerous speed. A.as B. which C. what D. that,(04湖南24) I think father would like to know _ Ive been up to so far
13、，so I decide to send him a quick note.A. which B. why C. what D. how (04全国31) You are saying that everyone should be equal，and this is _ I disagree.A. why B. where C. what D. how,(05全国23) Mary wrote an article on_ the team had failed to win the game.A. why B. what C. who D. that (05辽宁29)Do you have any idea_ is actually going on in the classroom? A. that B. what C. as D. which,(05湖南35)I was surprised by her words，which made me recognize_ silly mistakes I had made.A. what B. that C. how D. which,
