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NounClausesHowshouldweusemoderntechnology?Theproblemis…Theproblemishowweshouldusemoderntechnology.WhenwillmanbeabletoliveonMars?….isunknowntousall.WhenmanwillbeabletoliveonMarsisunknowntousall.Wherewillalltheseadvancedtechnologyleadus?Ican’timagine….Ican’timaginewherealltheseadvancedtechnologywillleadus.1.连接词有：thatwhether和lf2.连接代词有：whowhomwhosewhichwhat等3.连接副词有：whenwherewhyhow等另外whateverwhoeverwhichever等也可以引导主语和宾语两种从句。名词性从句是一种具有名词功能的非独立分句，可以表示：事实和问题。名词性从句中的that没有词义，也不作任何成分。除引导宾从外，主从和表从中不省从句一律保持陈述语序主语从句同位语从句表语从句宾语从句1.主语从句：从句在句中充当主语成分1)Thattheearthisroundistrue.2)Whetherhewillcomeisdoubtful.3)Whathesaidsurprisedmemost.4)Wherehehidthemoneyistobefoundout.5)Whoevercomesiswelcome.6)It’scertainthathewillsucceed.7)Howwecanhelpthetwinswillbediscussedatthemeeting.8)Whenthey’llstarttheprojecthasnotbeendecidedyet.It的用法：（形式主语）It’possible/important/necessary/clear…that……很可能/重要的是…/必要的是…/很清楚…It’said/reported…that…据说/据报道…It’sbeenannounced/declaredthat…已经通知/宣布…Itseems/appears/happens..that…显然、明显、碰巧…It’snowonderthat…并不奇怪/无疑…It’sapity/afact/acommonknowledge(众所周知）/acommonsaying….（俗话说）1.Whatyouleftareonlyseveraloldbooks.2.Whatyousaidisofgreatimportance.3.Whathesaysanddoesdoesn’tconcernme.4.Whathesaysanddoesdon’tagree.“if”不能引导主语从句，应有“whether”引导。主语从句的“that”一般不能省。“what”引导主语从句时，谓语动词：1）常与其后作表语的名词一致2）根据句子的语境而定。1.___hemadeanimportantspeechatthemeetingwastrue.A.ThatB.WhyC.WhatD.How2.___we’llgocampingtomorrowdependsontheweather.A.IfB.WhetherC.ThatD.Where3.___isknowntousallisthatAmericaisadevelopedcountry____theFirstWorld.A.Which;belongtoB.As,belongedtoC.What;belongingtoD.It;belongingto4.It’sknowntousall___aformofenergy.A.waterisB.thatwaterisC.iswaterD.thatwaterto5.Itworriedherabit___herhairwasturninggray.A.whetherB.ThatC.whatD.when6.WhatIsayandthink___noneofyourbusiness.A.isB.areC.hasDhave2.宾语从句：从句在句中充当宾语成分（可以作谓语动词、介词、不定式等非谓语动词的宾语）that,whether，if（that常可省略）连词：who,what,which,whoever,whateverwhen,where,why,how1).CanyoumakesurewhereAlicehasputthegoldring.2).Italldependsonwhethertheywillsupportus.3).Shewillgivewhoeverneedshelpawarmsupport.4).Hemadeitcleartothepublicthathedidanimportantandnecessaryjob.5).Ifinditnecessarythatweshoulddothehomework.1.当主句的谓语动词是一般现在时或一般将来时，宾语从句的谓语动词可以用所需要的任何一种时态。2.当主句的谓语动词是一般过去时，宾语从句的谓语动词要用相应的过去时态，但当宾语从句叙述的内容为客观真理时，仍然用一般现在时。Theteachertoldhisclassthatlight_______fasterthansound.travelswillbegoeswereplayinghavereturnedhadbeen1.Theradiosaysit_______cloudytomorrow.(be)2.Theheadmasterhopeseverything______well.(go)3.Tomsaysthatthey_____________(play)basketballatsixo’clockyesterdayevening.4.Ihearthey_______________(return)italready.5.Hesaidthatthey_________membersofthePartysince1948.(be)wrotehastakenhadbeen6.Ididn’tknowwhattimehe_______theletter.(write)7.Couldyoutellmewho_________awaythebookalready?(take)8.LingFengtoldmehe_________totheGreatWallseveraltimes.(be)3.表语从句：从句在句中充当表语成分，一般放在连系动词之后.作用：对主语进行解释说明。连接词：that/whether/asif/asthough（if不引导表语从句)连接代词：who/whoever/which/whatever连接副词：when/where/why/how/becauseChinaisnolongerwhatsheusedtobe.That’sbecausewewereinneedofmoneyatthattime.Helookedasifhewasgoingtocry.Tomorrowiswhenitwouldbemostconvenient.1.在表语从句中，表“是否”时，只能用“whether”不能用“If”。2.一般情况下，“that”不能省。3.Itis/wasbecause….Itis/waswhy….3.Thereason(why…/for…)is/wasthat….4Thereasonisbecause/why…that….1.That’s___thePartycalledonustodo.A.whyB.whatC.howD.that2.Thereasonis___heisunabletooperatethemachine.A.becauseB.whyC.thatD.Whether3.Thatis___theyseparated.A.thatB.whatC.whichD.where4.Janeisnolonger___shewasfouryearsago.A.whatB.whichC.thatD.when4同位语从句：从句在句中充当同位语成分，一般跟在一些抽象名词（idea；belief；fact；truth；rumour；news等）后面，对名词作进一步解释说明.同位语从句常用that/whether引导或连接副词when/where/why/how1)Theideathatcomputerscanrecognizehumanvoicessurprisesmanypeople.2)WordcamethatNapoleonhimselfwascomingtoinspectthem.3).SydneykepthispromisethathewouldalwaysdoanythinghecouldforLucietomakesureofherhappiness.Ihavenoideawhenhewillgetmarried.howtheycangetthetreasure.wheretheconcertwillbeheld.whoisfitforthework.whyithappened.whichpenismine.whatweshoulddonext.whomtheyaretalkingabout.whetherit’llraintomorrow.thatourfootballteamwonthegame.WeexpressedthehopethattheywouldcometoChinaagain.Weexpressedthehopethattheyhadexpressed同位语从句和定语从句的区别：1.同位语从句——that只起连接作用，不作任何成分定语从句——that是关系代词，起连接作用和充当宾语和主语2.同位语从句——同位语从句和前面的名词是同位关系，对名词进行补充说明定语从句——定从和前面的名词是所属关系，对名词进行修饰，加以限定3.同位语从句——that不能省定语从句——that在从句中作宾语时，可以省1.Theideathatcomputerswillrecognizehumanvoicessurprisesmanypeople.1)Whatistheidea?Theideaisthatcomputerswillrecognizehumanvoices.2)Whatsurprisesmanypeople?i)Theideasurprisesmanypeople.ii)Thatcomputerswillrecognizehumanvoicessurprisesmanypeople.2.Thepossibilitythatthemajorityofthelaborforcewillworkathomeisoftendiscussed.1)Whatisthepossibility?Thepossibilityisthatthemajorityofthelaborforcewillworkathome.2)Whatisoftendiscussed?i)Thepossibilityisoftendiscussed.ii)Thatthemajorityofthelaborforcewillworkathomeisoftendiscussed.3.We’lldiscusstheproblemthatthemajorityofthestudentsareoftenlateforschool.1)Whatistheproblem?Theproblemisthatthemajorityofthestudentsareoftenlateforschool.2)Whatwillwediscuss?