【課件】語法專題主語從句課件高中英語人教版(2019)選擇性必修第一冊

Nounclausesas

thesubject主語從句一、什么是主語從句？找出主語a.Atreehasfallenacrosstheroad.b.Youareastudent.c.Tofindyourwaycanbeaproblem.d.Smokingisharmfultoyou.e.Whatshesaidisnotyetknown.f.Thatweshallbelateiscertain.從句=引導詞+句（完整/不完整）在句子中充當主語的從句就是主語從句Observingthesentences翻譯：袁隆平最需要的（東西）是時間。a.Thethingthat/whichYuanneedsmostistime.b.WhatYuanneedsmostistime.翻譯:我最敬愛的人是袁隆平。a.ThepersonwhoIadmiremostisYuanLongping.b.WhoIadmiremostisYuanLongping.他通過了考試讓老師很高興。Hepassedtheexam.Itmadetheteacherhappy.Hepassedtheexammadetheteacherhappy.

Thathepassedtheexammadetheteacherhappy.理解主語從句他何時要來還不清楚。Whenwillhecome?Itisnotclear.Whenwillhecomeisnotclear.

Whenhewillcomeisnotclear.理解主語從句從句用陳述句語序主語從句用什么引導詞？ObservingthesentencesA.ThatYuanLongpingisafamousscientistisknowntoall.B.WhetherYuanLongpingcouldsucceedwasunknownatthattime.C.WhyYuanLongpingdecidedtostudyagricultureisunknowntothepublic.D.Howtheresearchcouldbedonewasachallengingquestion.E.WhenDr.Yuan’seffortscouldpayoffwasuncertain.F.WhereDr.Yuancancarryouthisresearchisveryimpotant.________Dr.Yuanwillsetupanewresearchbaseiscertain.__________Dr.Yuanwillsetupanewresearchbaseisuncertain.引導詞ThatWhether1)從屬連詞that和whether：When/Where/How/Why2)連接副詞when,where,how,why_______Dr.Yuanwillsetupanewresearchbaseisuncertain.引導詞Tips:step1.從句完整時引導詞用：從屬連詞that,whether,連接副詞when,where,why,howstep2.結(jié)合語篇，根據(jù)句意選取對應一個

WhoIadmireisYuanLongping.WhatDr.Yuanneedismoretime.

引導詞

3)連接代詞who,what,whichObservingthesentencesWhichmethodIshallchoosehasn’tbeendecided.Whoevercomesiswelcome.WhateverIhaveisyours.Whicheveryouwantisyours.

whatever=anythingthatwhoever=anyonewho

引導詞

3)連接代詞whoever,whatever,whichever

引導詞

3)連接代詞whoever,whatever,whichever1.

引導詞：從屬連詞that,whether；

連接副詞

when,where,how,why。

連接代詞who,what,which；whoever,whatever,whichever;

主語從句的特點：3.從句解題步驟？2.

跟定語從句的不同？Tips:主語從句解題步驟：1.找出主句

謂語動詞2.確定從句性質(zhì)（主語從句

）3.看從句完整性選擇引導詞4.看句意確定引導詞主語從句的疑點例1.Whenwillhecomeisnotknown.規(guī)律一、主語從句一律用陳述語序，即主語在前，謂語在后。正：Whenhewillcomeisnotknown.例2.Hewillnotcometothemeetingthiseveningistrue.正：Thathewillnotcometothemeetingthiseveningistrue.規(guī)律二、連詞that在從句中無實際意義，但不能省略。例3.Whichimpressedmemostisherlovelysmilingface.正：Whatimpressedmemostisherlovelysmilingface.規(guī)律三、主語從句中從句不完整，且缺的是something,用連接代詞what引導ThemostimpressivemoviewhatIhaveseenisTitanic.例4.Ifthemeetingwillbeputoffhasnotbeendecidedyet.正：Whetherthemeetingwillbeputoffhasnotbeendecidedyet.規(guī)律四、whether可以引導主語從句，放在句首，但if不能例5.

Whenhewillcomeareapuzzle.正：Whenhewillcomeisapuzzle.規(guī)律五、從屬連詞that,whether和連接副詞when,where,how,why引導的主語從句的謂語動詞多用單數(shù)第三人稱形式。Whenthemeetingwillbegin_____(have)notbeendecidedyet.hasWhentheywillstartandwheretheywillgo_____(be)stillunknown.Whenandwherethemeetingwillbegin_____(have)notbeendecidedyet.arehas例61.Whatheneeds___thatbook.2.Whatheneeds____somebooks.規(guī)律六、連接代詞what，who引導的主語從句，可根據(jù)表語決定主句動詞的單復數(shù)形式。isare例7Itisuncertainthattheexperimentisworthdoing.

注解：一般來說主語從句都是放在

,但有時為了使句子

,避免”頭重腳輕”,常用

作

，從而把主語從句放在

．

句首保持平衡

it

形式主語后面Itisuncertainwhethertheexperimentisworthdoing.規(guī)律七、形式主語句式中主語從句引導詞不只that,還可能是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.復習本課主語從句要點。2.讀背handouts中形式主語句型，完成對應翻譯練習。3.完成學考練p73練習1.__________thefactorywillemploymorenewworkersistrue.2.__________thewitnesssaidwastrue.3.Everyyear,________makesthemostbeautifulkitewillwinaprizeintheKiteFestival.4.________theboydistractsfrequentlyinclassiswhathisteacherwantstoknow.5._________thedelayedflightwilltakeoffdependsmuchontheweather.ThatWhatwhoeverWhyWhen形式主語常用句型:

1)Itis+n.+that

Itisapity/shamethat...可惜的是……

Itisasurprisethat…令人吃驚的是…

Itisafactthat…事實是…Itiscommonknowledgethat……是常識

*_______________(很可惜)welostthematch.*______________(這是事實)hecheatedintheexam.ItisapitythatItisafactthat1.令人吃驚的是他改變了主意。

Itisasurprisethathechangedhismind.2.真可惜你錯過了這么一個好機會。

Itisapitythatyoumissedsuchagoodchance.3.事實是我們周圍的污染正變得越來越嚴重。

Itisafactthatthepollutionaroundusisbecomingmoreandmoreserious.2)Itis+adj.+that

It’scertainthat…肯定…

Itispossible/likelythat...很可能……Itisobvious/clearthat…很明顯…Itistruethat…的確…

Itisnecessary\important\natural\...that…*_______________(很可能)shewillcomebacktomorrow.*_______________(很明顯)heisanEnglish.+(should)+do…ItispossiblethatItisobviousthat1.很可能他會申請這項工作的。

Itislikelythathewillapplyforthejob.2.的確我犯了個錯誤。

ItistruethatImadeamistake.3.有必要我們要學習英語。

ItisnecessarythatweshouldlearnEnglish.3)It+不及物動詞+thatIthappenedthat...碰巧……

Itoccurredtomethat…我突然想起…Itappears/seemsthat…似乎，好像…Itturnedoutthat…原來…*________________(剛好)Iwasoutyesterday.*____________________(我突然想起)Iforgottosenttheletter.IthappenedthatItoccurredtomethat1.好像是我錯了。

ItappearsthatIamwrong.2.碰巧他得去參加一個會議。

Ithappenedthathehadtoattendameeting.3.我突然想起他會說英語。

ItoccurstomethathecanspeakEnglish.4.原來他是Mary的朋友。

ItturnedoutthathewasMary’sfriend.4)It+be+過去分詞+從句Itissaidthat...據(jù)說……Itisknowntoallthat...眾所周知……Itisreportedthat...據(jù)報道……Itisbelievedthat...據(jù)相信……;人們相信……Itissuggestedthat+(should）do...

建議……*_________________(據(jù)報道)20peoplewerekilledintheaccident.*__________________