【课件】语法专题主语从句课件高中英语人教版(2019)选择性必修第一册

Nounclausesas

thesubject主语从句一、什么是主语从句？找出主语a.Atreehasfallenacrosstheroad.b.Youareastudent.c.Tofindyourwaycanbeaproblem.d.Smokingisharmfultoyou.e.Whatshesaidisnotyetknown.f.Thatweshallbelateiscertain.从句=引导词+句（完整/不完整）在句子中充当主语的从句就是主语从句Observingthesentences翻译：袁隆平最需要的（东西）是时间。a.Thethingthat/whichYuanneedsmostistime.b.WhatYuanneedsmostistime.翻译:我最敬爱的人是袁隆平。a.ThepersonwhoIadmiremostisYuanLongping.b.WhoIadmiremostisYuanLongping.他通过了考试让老师很高兴。Hepassedtheexam.Itmadetheteacherhappy.Hepassedtheexammadetheteacherhappy.

Thathepassedtheexammadetheteacherhappy.理解主语从句他何时要来还不清楚。Whenwillhecome?Itisnotclear.Whenwillhecomeisnotclear.

Whenhewillcomeisnotclear.理解主语从句从句用陈述句语序主语从句用什么引导词？ObservingthesentencesA.ThatYuanLongpingisafamousscientistisknowntoall.B.WhetherYuanLongpingcouldsucceedwasunknownatthattime.C.WhyYuanLongpingdecidedtostudyagricultureisunknowntothepublic.D.Howtheresearchcouldbedonewasachallengingquestion.E.WhenDr.Yuan’seffortscouldpayoffwasuncertain.F.WhereDr.Yuancancarryouthisresearchisveryimpotant.________Dr.Yuanwillsetupanewresearchbaseiscertain.__________Dr.Yuanwillsetupanewresearchbaseisuncertain.引导词ThatWhether1)从属连词that和whether：When/Where/How/Why2)连接副词when,where,how,why_______Dr.Yuanwillsetupanewresearchbaseisuncertain.引导词Tips:step1.从句完整时引导词用：从属连词that,whether,连接副词when,where,why,howstep2.结合语篇，根据句意选取对应一个

WhoIadmireisYuanLongping.WhatDr.Yuanneedismoretime.

引导词

3)连接代词who,what,whichObservingthesentencesWhichmethodIshallchoosehasn’tbeendecided.Whoevercomesiswelcome.WhateverIhaveisyours.Whicheveryouwantisyours.

whatever=anythingthatwhoever=anyonewho

引导词

3)连接代词whoever,whatever,whichever

引导词

3)连接代词whoever,whatever,whichever1.

引导词：从属连词that,whether；

连接副词

when,where,how,why。

连接代词who,what,which；whoever,whatever,whichever;

主语从句的特点：3.从句解题步骤？2.

跟定语从句的不同？Tips:主语从句解题步骤：1.找出主句

谓语动词2.确定从句性质（主语从句

）3.看从句完整性选择引导词4.看句意确定引导词主语从句的疑点例1.Whenwillhecomeisnotknown.规律一、主语从句一律用陈述语序，即主语在前，谓语在后。正：Whenhewillcomeisnotknown.例2.Hewillnotcometothemeetingthiseveningistrue.正：Thathewillnotcometothemeetingthiseveningistrue.规律二、连词that在从句中无实际意义，但不能省略。例3.Whichimpressedmemostisherlovelysmilingface.正：Whatimpressedmemostisherlovelysmilingface.规律三、主语从句中从句不完整，且缺的是something,用连接代词what引导ThemostimpressivemoviewhatIhaveseenisTitanic.例4.Ifthemeetingwillbeputoffhasnotbeendecidedyet.正：Whetherthemeetingwillbeputoffhasnotbeendecidedyet.规律四、whether可以引导主语从句，放在句首，但if不能例5.

Whenhewillcomeareapuzzle.正：Whenhewillcomeisapuzzle.规律五、从属连词that,whether和连接副词when,where,how,why引导的主语从句的谓语动词多用单数第三人称形式。Whenthemeetingwillbegin_____(have)notbeendecidedyet.hasWhentheywillstartandwheretheywillgo_____(be)stillunknown.Whenandwherethemeetingwillbegin_____(have)notbeendecidedyet.arehas例61.Whatheneeds___thatbook.2.Whatheneeds____somebooks.规律六、连接代词what，who引导的主语从句，可根据表语决定主句动词的单复数形式。isare例7Itisuncertainthattheexperimentisworthdoing.

注解：一般来说主语从句都是放在

,但有时为了使句子

,避免”头重脚轻”,常用

作

，从而把主语从句放在

．

句首保持平衡

it

形式主语后面Itisuncertainwhethertheexperimentisworthdoing.规律七、形式主语句式中主语从句引导词不只that,还可能是what,who,whether,when,where,why,how.ObservingthesentencesA.ThatYuanLongpingisafamousscientistisknowntoall.B.WhetherYuanLongpingcouldsucceedwasunknownatthattime.C.WhyYuanLongpingdecidedtostudyagricultureisunknowntothepublic.D.Howtheresearchcouldbedonewasachallengingquestion.E.WhenDr.Yuan’seffortscouldpayoffwasuncertain.F.WhereDr.Yuancancarryouthisresearchisveryimpotant.Itremainsapuzzle_________willwinthesingingcompetition..AccessingyourprogressWhathaveyoulearnedaboutnounclauseassubject?Homework1.复习本课主语从句要点。2.读背handouts中形式主语句型，完成对应翻译练习。3.完成学考练p73练习1.__________thefactorywillemploymorenewworkersistrue.2.__________thewitnesssaidwastrue.3.Everyyear,________makesthemostbeautifulkitewillwinaprizeintheKiteFestival.4.________theboydistractsfrequentlyinclassiswhathisteacherwantstoknow.5._________thedelayedflightwilltakeoffdependsmuchontheweather.ThatWhatwhoeverWhyWhen形式主语常用句型:

1)Itis+n.+that

Itisapity/shamethat...可惜的是……

Itisasurprisethat…令人吃惊的是…

Itisafactthat…事实是…Itiscommonknowledgethat……是常识

*_______________(很可惜)welostthematch.*______________(这是事实)hecheatedintheexam.ItisapitythatItisafactthat1.令人吃惊的是他改变了主意。

Itisasurprisethathechangedhismind.2.真可惜你错过了这么一个好机会。

Itisapitythatyoumissedsuchagoodchance.3.事实是我们周围的污染正变得越来越严重。

Itisafactthatthepollutionaroundusisbecomingmoreandmoreserious.2)Itis+adj.+that

It’scertainthat…肯定…

Itispossible/likelythat...很可能……Itisobvious/clearthat…很明显…Itistruethat…的确…

Itisnecessary\important\natural\...that…*_______________(很可能)shewillcomebacktomorrow.*_______________(很明显)heisanEnglish.+(should)+do…ItispossiblethatItisobviousthat1.很可能他会申请这项工作的。

Itislikelythathewillapplyforthejob.2.的确我犯了个错误。

ItistruethatImadeamistake.3.有必要我们要学习英语。

ItisnecessarythatweshouldlearnEnglish.3)It+不及物动词+thatIthappenedthat...碰巧……

Itoccurredtomethat…我突然想起…Itappears/seemsthat…似乎，好像…Itturnedoutthat…原来…*________________(刚好)Iwasoutyesterday.*____________________(我突然想起)Iforgottosenttheletter.IthappenedthatItoccurredtomethat1.好像是我错了。

ItappearsthatIamwrong.2.碰巧他得去参加一个会议。

Ithappenedthathehadtoattendameeting.3.我突然想起他会说英语。

ItoccurstomethathecanspeakEnglish.4.原来他是Mary的朋友。

ItturnedoutthathewasMary’sfriend.4)It+be+过去分词+从句Itissaidthat...据说……Itisknowntoallthat...众所周知……Itisreportedthat...据报道……Itisbelievedthat...据相信……;人们相信……Itissuggestedthat+(should）do...

建议……*_________________(据报道)20peoplewerekilledintheaccident.*__________________