主语从句优秀PPT课件

1、 Noun Clauses -By Debby1CHENLIGrammar What part does the underlined part serve as in each sentence? A tree has fallen across the road. You are a student. To find your way can be a problem. Smoking is bad for you.2CHENLI “How do you do?” is a greeting. What she said is not yet known. That we shall be

2、 late is certain. It is certain that we shall be late. 3CHENLI 主语从句主语从句（Noun Clauses as the Subject） 定义：定义： 用作主语的从句叫主语从句，它是名用作主语的从句叫主语从句，它是名词性从句之一。引导主语从句的连接词有：词性从句之一。引导主语从句的连接词有：连词连词that, whether；连接代词连接代词who, what和和which；连接副词连接副词when, where, how和和why。4CHENLI主语从句的连接词主语从句的连接词 连词连词that(无词义无词义, 不作成分不作成分

3、, 不能省不能省略略);whether(是否是否),if不能位于句首。不能位于句首。 That he will come and help us is certain. Whether we will succeed is still a question. It is not known if he will come.注意注意: : 已确定的事由已确定的事由thatthat引导引导; ; 没决定的事由没决定的事由whetherwhether引导引导. . 5CHENLI主语从句常用主语从句常用it it作形式主语放句首作形式主语放句首因而我们常见到这种句式：因而我们常见到这种句式：It+b

4、e+n./adj/-ed从句（从句（that, whether,etc.)例：例：Its a pity that you should have to leave. = That you should have to leave is a pity.It is great that I have a teacher like you.= That I have a teacher like you is great.6CHENLI2)连接代词连接代词who ，what ，which, whatever, whichever, whoever 充当成分，有具体意义充当成分，有具体意义What s

5、eems easy to some people seems difficult to others.Which side will win is not clear. 3)连接副词连接副词when，where， how， why等。等。Why he did it remains a mystery.When they will start is not known yet.How he became a great scientist is known to us all.7CHENLI2.位置：位置： 主语从句可以前置，也可以主语从句可以前置，也可以后置。用后置。用it做形式主语，而把主语

6、从做形式主语，而把主语从句，在句末，常用下面几种句型。句，在句末，常用下面几种句型。1）It + be + 表语表语 +主语从句主语从句表语：（名词，表语：（名词， 形容词，过去分词）形容词，过去分词）It is a fact (a shame, a pity, good news) thatIt is still uncertain whether he is coming or not.It is an honour that I was invited to attend the meeting.8CHENLIIt is certain that she will do well in

7、her exam.It is true that I told her everything.It is said that Mr. Green has arrived in Beijing.It is reported that China has sent another manmade earth satellite into orbit.9CHENLI2）It+不及物动词不及物动词+主语从句主语从句It seemed (happened, doesnt matter, has turned out) that It happens that they were absent.It se

8、ems that Alice is not coming to the party at all.It doesnt matter whether she will come or not.It makes no difference where we shall have the meeting.10CHENLI3) It +及物动词（被动语态）及物动词（被动语态）+主语从句主语从句It has been decided that the exhibition will not open on Sundays.注意注意:1）主语从句在句首时，必须由连接词引导，）主语从句在句首时，必须由连接词

9、引导，不能省略这些连接词；但是如果用不能省略这些连接词；但是如果用it做形式做形式主语，而把主语从句放在句末时，从属连词主语，而把主语从句放在句末时，从属连词that可以省略。可以省略。11CHENLI4) . 用于用于It is important / natural / necessary / impossible that.句型中句型中, 主语从句应使用虚主语从句应使用虚拟语气拟语气, 谓语动词用谓语动词用“should + 动词原形动词原形”的的形式形式, should有时可以省略。有时可以省略。5) 在在It + be+suggested/advised/ordered/reques

10、ted/ insisted/required 中中, that从句的谓语也从句的谓语也应该用应该用“should + 动词原形动词原形”的形式的形式, should有时可以省略。有时可以省略。12CHENLI(1)主语从句中用陈述语序主语从句中用陈述语序What she is afraid of is their taking her to Paris. ( What is she afraid of Wrong )(2)主语从句后谓语动词用三人称单数主语从句后谓语动词用三人称单数That they havent phoned is strange.(3)that引导的主语从句中，引导的主语从

11、句中，that不可不可被省略被省略That price will go up is certain.13CHENLI 4. what 与与that 在引导主语从句时的在引导主语从句时的区别区别 what 引导主语从句时在句时在从句中充当引导主语从句时在句时在从句中充当句子成分，如主语宾语表语，而句子成分，如主语宾语表语，而that 则则不然。例如：不然。例如： 1) What you said yesterday is right. 2) That she is still alive is a consolation. What在此引导主语从句,又做said的宾语That 只起连接作用,不做

12、成分14CHENLIpractice15CHENLI1.Where shall we spend the holiday isnt decided.2.You have made a mistake is a fact.3.That is certain that we can win.4.No matter who leaves the room last ought to turn off the lights.5.It is important that a student learns a foreign language.we shallThat you haveIt isWhoev

13、ershould learn改错练习改错练习16CHENLIDescribe your mother with your partner.Suggested structures:What my mother likes is_.What my mother doesnt like is _Whether my mother would feel happy is _Why my mother would be happy is _Why my mother feels upsad is_17CHENLI 1. _ you dont like him is none of my busines

14、s. 2. _ he said at the meeting astonished everybody present3. _ the 2000 Olympic Games will be held in Beijing is not known yet.4. _ well go camping tomorrow depends on the weather.5. _ leaves the room last ought to turn off the lights. ThatWhatWhetherWhetherWhoever18CHENLI 6. _ is a fact that Engli

15、sh is being accepted as an international language.7.It worried her a bit _ her hair was turning grey. 8. The Foreign Minister said, “_ is our hope that the two sides will work towards peace.”9. After Yang Liwei succeeded in circling the earth, _ our astronauts desire to do is walk in space. ItthatIt

16、what19CHENLI1.I hate _ when people talk with their mouths full（MET98） A. it B. that C. these D. them 2. I feel _ strange that he should be so careless. A. / B. it C. that D. how 3. It worried her a bit _ her hair was turning grey.（MET92） Awhile B. that Cif Dfor20CHENLI1. _ made the school proud was_

17、 more than 90 of the students had been admitted to key universities. A. What; because B. What ; thatC. That ; what D. That ; because21CHENLI2. _ we will go camping tomorrow depends on the weather. A. If B. Whether C. That D. Where3 _ that they can pass the written exam this time. A. That is hoped B.

18、 It is hoped C. It hopes D. That hopes22CHENLI 5. _ leaves the room last ought to turn off the lights. A. Anyone B. The person C. Whoever D. Who 6. _ is a fact that English is being accepted as an international language. A. There B. This C. That D. ItCD23CHENLI 7. _ in the newspaper that the price o

19、f food will go up. A. It says B. It is said C. It has said D. He is said8. It worried her a bit _her hair was turning grey. A. while B. that C. if D. forBB24CHENLI 9. There is no doubt _. A. that Mr. Hansen is in good health B. whether is Mr. Hansen healthy C. if Mr. Hansens health was returning D.

20、whether Mr. Hansen in healthA25CHENLI 10. The Foreign Minister said, “_ our hope that the two sides will work towards peace.” A. This is B. There is C. That is D. It is D26CHENLI 11. It is necessary that a college student _ at least a foreign language. A. masters B. should master C. mastered D. will

21、 masterB27CHENLI It 作形式主语代替主语从句，主要是为了平衡句作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而子结构，主语从句的连接词没有变化。而it引导的强引导的强调句则是对句子某一部分进行强调，无论强调的是调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词什么成分，都可用连词that。被强调部分指人是也可。被强调部分指人是也可用用who/whom。例如：。例如： It is a pity that you didnt go to see the film. It doesnt interest me whether you succeed or not. It is in the morning that the murder took place. It is John that b