人教版高一英语Unit4 Astronomy the science of the stars 主语从句 新课标 人教

1、2021/8/9 星期一1Unit 4 Astronomy: the science of the starsGrammarThe subject clause2021/8/9 星期一2 主语从句 主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。2021/8/9 星期一31引导主语从句的连接词有三类：(1)连词that、 whether ：Thattheywereintruthsisterswasclearfromthefacialresemblancebetweenthem.Whetherhellcomehereisntclear.Tha

2、t price will go up is certain.Whether we go by train or by boat makes no difference.2021/8/9 星期一4Who will write the poem has not been decided yet.Whatever he did is right.Whatshedidisnotyetknown.Whoevercomesiswelcome.Whichever you want is yours(2)连接代词who,whom,whose,what,which,whoever,whatever,whiche

3、ver等2021/8/9 星期一53)连接副词where,when,how,why等。Howthishappenedisnotcleartoanyone.Whereveryouareismyhome-myonlyhome.When he will be back depends on the weather.Where we live doesnt matter.How the pyramids were built was still a mystery.2021/8/9 星期一6A.It+be+形容词(obvious,true,natural,surprising,good,wonderf

4、ul,funny,possible,likely,certain,probable,etc.)+that从句。如：Itiscertainthatshewilldowellinherexam.Itisprobablethathetoldhereverything.B.It+be+名词词组(nowonder,anhonour,agoodthing,apity,nosurprise,etc.)+that从句。如：Itsapitythatwecantgo.Itsnosurprisethatourteamshouldhavewonthegame.2. 用it 作形式主语的结构2021/8/9 星期一7C

5、.It+be+过去分词(said,reported,thought,expected,decided,announced,arranged,etc.)+that从句。如：ItissaidthatMr.GreenhasarrivedinBeijing.ItisreportedthatChinahassentanothermanmadeearthsatelliteintoorbit.D.It+seem,happen等不及物动词及短语+that从句。如：ItseemsthatAliceisnotcomingtothepartyatall.AliceIthappenedthatIwasoutthatd

6、ay.E.It+doesntmatter(makesnodifference,etc.)+连接代词或连接副词引起的主语从句。如：Itdoesntmatterwhethershewillcomeornot.Itmakesnodifferencewhereweshallhavethemeeting.2021/8/9 星期一8F.当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。如：Isittruethatthescientistwillgiveusalecturenextweek?Doesitmattermuchthattheywillnotcometomorrow?

7、G.当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。如：Howstrangeitisthatthechildrenaresoquiet!2021/8/9 星期一93. 主语从句不可位于句首的五种情况：（1）if 引导的主语从句不可居于复合句句首。（2）It is said /reported结构中的主语从句不可提前。例如： It is said that President Jiang will visit our school next week. That President Jiang will visit our school next week is said. （

8、3）It happens/occurs结构中的主语从句不可提前。例如： It occurred to him that he failed in the examination. That he failed in the examination occurred to him. （4）It doesnt matter how/whether 结构中的主语从句不可提前。例如： It doesnt matter whether he is wrong or not. Whether he is wrong or not doesnt matter. （5）含主语从句的复合句是疑问句时，主语从句不

9、可提前。 Is it likely that it will rain in the evening? Is that will rain in the evening likely? 2021/8/9 星期一104. 主语从句需注意的问题(1)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第三人称单数That they havent phoned is strange.(3)that引导的主语从句中，that不可被省略That

10、price will go up is certain.2021/8/9 星期一114. It 作形式主语和it引导强调句的比较 It 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it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人是也可用who/whom。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

11、 murder took place. It is John that broke the window.2021/8/9 星期一12 5. what 与that 在引导主语从句时的区别 what 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that 则不然。例如： 1) What you said yesterday is right. 2) That she is still alive is a consolation. It is right what you said yesterday.It is a consolation that she is still al

12、ive.2021/8/9 星期一131.Where shall we spend the holiday isnt decided.2.Your 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 isWhoevershould learn改错练习2021/8/9 星期一141. I read about it in some book or other, does it matter _ it was? （01北京春季)Awhere Bwhat Chow Dwhich2. After Yang Liwei succeeded in circling the earth, _ our astronauts desire to do is walk in space. （04上海） A. wh