Grammar主語從句Grammar3.Tofindyourwaycanbeaproblem.

2.Smokingisbadforyou.1.Youareastudent.4.“Howdoyoudo?”isagreeting.5.Whatshesaidisnotyetknown.6.Thatweshallbelateiscertain.7.Itiscertainthatweshallbelate.Subject（主語）AsentenceservingassubjectiscalledSubjectClause.

主語從句

（NounClausesastheSubject）

定義：

用作主語的從句叫主語從句，它是名詞性從句之一。引導主語從句的連接詞有：連詞that,whether；連接代詞who,what和which；連接副詞when,where,how和why。

Whowillgo

isimportantforme.Whichisthebest

isnotclear.Whydinosaursdiedout

isunknown.Wherewewillgettogether

hasnotbeendecided.Howshecankeephealthy

isasecret.Whetherhewillcome

isnotveryimportant.一主語從句的連接詞1.that只起引導作用，本身無實際意義，不充當任何成分，但不能省略。Thatshelefthimmadehimheart-broken.Thatheisstillaliveisagoodnewstous.2.置于句首只能用whether“是否”，不充當從句的任何成分。他是否會參加這個話劇表演是顯而易見的______________________________isclear.______________________________(他能否買到飛機票)doesn’tmattermuch.WhetherhecanbuytheplaneticketsWhetherhe’lltakepartintheplay1.Ifshewillcomeisnotimportant.

Whethershewillcomeisnotimportant.√×結論1：在主語從句中只能用whether,不能用if3wh-疑問詞包含意思，并在從句中充當成分。_____shewillbebackisstillaquestion._____youtoldmejustnowwasreallyasurprise._____wewillholdthebasketballgametomorrowisnotimportant._____classwillwinthefootballgameisnotclear._____willmeethimisnotdecided.WhenWhatWhereWhich

Who________breaksthelawshouldbepunished.________hashelpedtosavethedrowninggirlisworthpraising.________tellsliesiswrong．WhoeverWhoeverWhoever填空練習：1)_________themeetingwillbeheldnextweekhasn’tbeendecidedyet.2)_________theplanwillbecarriedoutisstillunknown.3)_________thebuildingofthecarfactorywillbestartedhasn’tbeendecidedyet.4)_________teamwillwinthematchisstillunknown.5)_________weneedismoretime.6)_________wecanarriveattheairportbefore8o’clockisstillaquestion.WhereWhenWhenWhichWhatWhether1.Wherewillthemeetingbeheldisnotdecided.

Wherethemeetingwillbeheldisnotdecided.×√結論2：主語從句應使用陳述句語序_____doshoppingdependsontheweather.

A.WhenwillweB.WhenwewillC.WhatwillweD.Whatwewill1)_____yousaidyesterdayisright.2)_____sheisstillaliveisaconsolation（安慰）.3)_____helostthebikeworriedhimalot.4)_____causedtheaccidentremainsunknown.

5)_____mademattersworsewas____nightbegantofall.6)_____wecan’tgetseemsbetterthan______wehave.WhatThatThat注：what

與that在引導主語從句時的區(qū)別what在從句中充當句子成分，如主語、賓語、表語，而that則不然。

WhatWhatthatWhatwhat二.it做形式主語為了防止句子頭重腳輕，通常把形式主語it放在主語位置，真正主語擱置于句末。1）It+be+名詞/形容詞+主語從句Exx:很肯定他會贏得比賽的。________________thathewillwinthematch.Itisverylikelythattheywillholdameeting.Itisimportantthatweallshouldattendthemeeting.It

isstillamysterywhatcausedtheaccident.Itiscertain2）It+不及物動詞(seem,happen,matter)+主語從句Itseemsthathehasseenthefilm.似乎…Ithappenedthattheywereabsent.碰巧…3）It＋過去分詞＋從句ItissaidthatPresidentObamawillvisitourschoolnextweek.據(jù)說…Itisdecidedthat…據(jù)決定Itisbelievedthat…據(jù)認為ItisknowntoallthatLiHuaisthebeststudentinourclass.眾所周知…Whateverhesaysisofnoimportance.Whoeversaysthisiswrong．但謂語動詞用單數(shù)還是復數(shù)，不可一概而論，而要視句子的意義而定

WhatIneedismoney.WhatIneedarebooks.三.在主語從句中，謂語一般用單數(shù)。Whenandwherewe’llholdthemeeting_____notbeendecidedyet.A.hasB.isC.haveD.are

1.____makesthisshopdifferentisthatitoffersmorepersonalservices.AWhatBWhoCWhateverDWhoever練習ThesewildflowersaresospecialthatIwoulddo____Icantosavethem.AwhateverBthatCwhichDwhichever3____intheregulationsthatyoushouldnottellpeoplethepassportofyoure-mailaccount.AWhatitrequiredBWhatrequiresCItisrequiredDItrequires1.Itisprettywellunderstood_____controlstheflowofcarbondioxideinandouttheatmospheretoday.A.thatB.whenC.whatD.how考題鏈接2._____madetheschoolproudwas____morethan90%ofthestudentshadbeenadmittedtokeyuniversities.A.What;becauseB.What;thatC.That;whatD.That;because3.______hereferredtoinhisarticlewas