Unit 1 Science and Scientists Discover useful structures 表语从句 课件【知识精研】高中英语人教版（2019）选择性必修第二册

表语从句PredicativeClauseLearningtargets1.Discovertheregulationandlearntojudgewherethepredicativeclauseis.2.Befamiliarwiththelinkingverbsandtrytotelltheirfunctions.3.Beabletochoosethelinkingverbscorrectlyandthenusethemfluently.Pointoutthefunctionofeachnouninthefollowingsentences:

1.Theworld

lovesnature.2.Knowledgeis

power.3.We

Chinese

are

peace-loving.subjectobjectpredicativesubjectsubjectappositionpredicativeReview主语从句在功能上相当于名词主语

{Hisjobisimportant.Whathedoesisimportant.主语

{Hisstoryisinteresting.

Whathesaidisinteresting.

一、主语从句的概念从句在复合句中作主语的名词性从句，通常放在主句谓语动词或be动词之前。

二、主语语从句三要素引导词（连接词）语序时态Review定义引导词注意点010203CONTENT目录表语从句的定义PART01Thepersonstoodinfrontofyoujustnowis

headmaster.

Thedoorremained

closed.

Thehouselooks

old.

Thesituationwent

worse.predicativelinkingverbsubject+linkingverbs+predicative1.Thedefinitionofpredicativeclause.Thequestioniswhowilldoit.Thequestionisdifficult.在复合句中充当表语的从句叫表语从句。位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。表语从句必须用陈述语序。（表）（表）表语从句2.Thestructureofpredicativeclause.主语+系动词+引导词

+简单句Thisiswhyhedidit.e.g.WhatIwanttosayis

that

Iamtired.表语从句表语从句的判断Thejudgmentofthepredicativeclause系动词后的成分为表语。系动词后的从句为表语从句系动词主要是be动词（am,is,are,was,were)，意为“是”。其它系动词：1)持续系动词（表示主语持续或保持一种状况或态度）：keep,remain,stay,stand2)“像”系动词（表示看起来像）：seem,appear,look3)感官系动词：look,feel,smell,sound,taste4)变化系动词（主语变成什么样）：become,grow,turn,fall,get,go5)终止系动词（主语已终止动作）：prove,turnoutThefactwasthathehadforgottenaboutit.Everythingremainedasitusedtobeinthisroom.Shelooksasifshewereill.Thetroublewaswhetherwecouldmanageitourselvesornot.Theproblemisnotwhowillgo,butwhowillstay.Thisishowtheyovercamethedifficulties.Hemissedthelecture.Itwasbecausehisflightwasdelayed.PredicativeClauseTaskTwo:Circletheconjuctionofeachpredicativeclause.TaskOne:Underlinethe

linkingverbs.表语从句的引导词PART02引导词Conjunctionwords引导词用法从属连词that无成分，无意义Whether无成分，意为“是否”连接代词what,which,who,whom,…+ever,whose在从句中充当主语，宾语，表语，定语连接副词how,when,where,…+ever,why在从句中充当状语其它连接词because,asif,asthough因为，好像，似乎Tip:缺什么补什么，什么都不缺用that（what所的）即学即练learningandpracticeThisis__________Iwant.MyEnglishislimited.Thisis_______IhatereadingEnglishbooks.Thevillageis_________Iusedtospendmyholiday.Itis___________Ireallylovethewayhebehaves.Thetroubleis__________weareshortoffunds.Myproblemis__________coatissuitableforme.I‘

d

like

to

startmyownbusiness—that’s________IwanttodoifIhadthemoney.WhatIwanttoknowis_______willsupportme.whatwherewhybecausethatwhichwhatwho表语从句的注意点PART03ThequestionishowcanImakeyouunderstandtheknowledge.ThequestionishowIcanmakeyouunderstandtheknowledge.Rule1:表语从句和宾语从句、主语从句一样，要用陈述语序：主语+谓语。表语从句的语序It

is

where

helivesin.It

is

where

helivedin10yearsago.Rule1主句用现在时或将来时，从句可用任何时态，根据实际情况而定。表语从句时态2.如果主句是过去的时态（一般过去时，过去进行时），从句的时态一定要用相对应的过去的某种时态（一般过去时，过去进行时，过去将来时，过去完成时）Herwishwasthatshecouldloseweightsoon.Itlookedasifitwasgoingtorain.Thequestionwaswhetherhisfatherwouldcomebackthenextday.Thereasonwhyhewaslatewasthatthetrainhadalreadyleft.表语从句的注意点ThegrammarrulersofthepredicativeclauseRule2:表语从句的引导词没有if!!!Thequestionisifitisworthwhiletodoit.Thequestioniswhetheritisworthwhiletodoit.只用whether,不用if的情况WhethertodoWhether……ornot介词后的宾语从句从句：句首的主语从句，表语从句，同位语从句表语从句的注意点ThegrammarrulersofthepredicativeclauseRule3:表语从句的虚拟语气Myproposalisthatwe(should)startearlytomorrow.Iproposethatwe(should)startearlytomorrow.Itisproposedthatwe(should)startearlytomorrow.在表示“建议，劝说，命令”的名词idea,advice,suggestion,request,proposal等后面的表语从句中，谓语动词用“should+动词原形”，should可省略表语从句的注意点ThegrammarrulersofthepredicativeclauseRule4:asif/asthough引导的表语从句常跟在look,seem,sound,feel等后面语气：若表示真实情况：用陈述语气若表示非真实情况：用虚拟语气Darkcloudsaregathering.Itlooksasifit’sgoingtorain.Itseemedasifthenightwouldneverend.表语从句的注意点ThegrammarrulersofthepredicativeclauseRule4

:asif/asthough引导的表语从句的虚拟语气：

若跟现在事实不符：过去式（be动词用were）若跟过去事实不符：haddone

若跟将来事实不符：would/could+动词原形Thelittleboytalksasifhekneweverythingintheworld.Hefeltasifhehadmetthisyoungladyforalongsomewhere.

即学即练learningandpracticeMysuggestionisthatwe__________(go)tohospitalatonce.Whenapencilispartlyinaglassofwater,itlooksasifit_______(be)broken.Myideaisthatwe___________(get)morepeopletoattendtheconference.Thelittlegirltalkedasifshe___________(be)agrown-up.Shelooksasifshe_________(be)tenyearsyounger.shouldgowereshouldgethadbeenwere(1)That’sbecausehedidn’tunderstandme.(2)It’swhyhegotangrywithme.那是因为他不理解我。那正是他对我生气的原因。(强调原因）（强调结果）1、句型：That/Itis/wasbecause……那是因为……That/Itis/waswhy……

那是……的原因Rule5:由从属连词because,why引导的表语从句2、句型：thereasonwhy……isthat……

…的理由是……

why引导定语从句

That/Itis/waswhy……

那是……的原因why引导表语从句(1)Thereasonwhyhewaslateisthathewasill.他迟到的理由是他病了。注意：

主句主语为reason,只能用that引导表语从句，不可用because.(2)

It’swhy

hegotangrywithme.那正是他对我生气的原因。1.Thereasonwhyhefailedis________hewastoocareless.A.becauseB.thatC.forD.becauseof2.Thisis___Sarawaslateforthemeeting.A.whyB.whatC.howD.That3.Thereasonis___heisunabletooperatethemachine.A.becauseB.whyC.thatD.Whether

B

C

A即学即练learningandpractice1.Heiscarelessandirresponsible.Thatwas_______hewasfired.2.Hewasfired.Thatwas_________heiscarelessandirresponsible.3.Thereason_______hewasfiredwas________hewascarelessandirresponsible.whybecausewhythat1.__________wewillgocampingthisweekenddependsontheweather.2.Itisuncertain________sideeffectthemedicinewillbringabout,althoughabouttwothousandpatientshavetakenit.3.Tomcamelateforthemeeting.Thatwas________hewasill4.Facedwithchallenges,youshouldbelieveyourcourageis_________makesadifference.5.Itisobvious________hetookmyumbrellabymistake.6.Yours