新人教版選修一Unit5DiscoverUsefulStructuresSubjectclauses主語(yǔ)從句定義主語(yǔ)從句連接詞主語(yǔ)從句注意事項(xiàng)鞏固練習(xí)Contents1234主語(yǔ)從句定義Part1主語(yǔ)從句定義1.找出下列句子的主語(yǔ)。1.Jimisgoodatplayingthepiano.2.Toseeistobelieve.3.Smokingisbadforhealth.4.Whathehassaidistrue.在主從復(fù)合句中充當(dāng)主語(yǔ)的從句就是主語(yǔ)從句,它是名詞性從句的一種。2.課文原句回顧。1.However,

concernedhimmostwas

farmersoftenhadpoorharvestsandsometimesevenhadaseriousshortageoffoodtoeat.2.

thiscouldbedonewasachallengingquestionatthetime.3.However,

itwaspossibletodevelopahybridofself-pollinatingplantssuchasricewasamatterofgreatdebate.4.Today,

isestimated

about60percentofdomesticrice...5.

impressespeoplemostaboutYuanLongpingishisongoingabilitytofulfilhisdreams.whatthatHowwhetheritthatWhat主語(yǔ)從句連接詞Part2主語(yǔ)的連接詞1.從屬連詞:that,whether/ifThathewillcomeiscertain.Whetherhewillcomeisuncertain.that只起連接作用，本身無(wú)意義，不充當(dāng)任何成分，但不能省略。whether/if意為是否，只起連接作用，不作成分。2.連接代詞：what,who,whom,whose,which,whatever,whoever,whichever等。它們?cè)谥髡Z(yǔ)從句中既起連接作用又在從句中充當(dāng)主語(yǔ)、賓語(yǔ)、或表語(yǔ)。Whowillgomakesnodifference.Whatweneedismoretime.WhichbookIshallchoosehasn'tbeendecided.Whoeverbreaksthelawwillbepunished.WhateverIhaveisyours.3.連接副詞:when,where,how,why.在從句中作狀語(yǔ)。Whenwewillleavehasn'tbeendecided.Howshekeepshealthyisasecret.Whyhecriesisnotclear.Wherethemeetingwillbeheldisnotknown.主語(yǔ)從句學(xué)法指導(dǎo)依據(jù)“缺什么補(bǔ)什么”原則確定正確的連詞。所謂“缺什么補(bǔ)什么”是指從句與連詞之間的關(guān)系。如果句子中缺主語(yǔ)，指人用who，指物用what。如缺賓語(yǔ)，指人用whom，指物用what。如缺時(shí)間狀語(yǔ)用when；地點(diǎn)狀語(yǔ)用where。

原因狀語(yǔ)用why；方式狀語(yǔ)用how。如缺定語(yǔ)用whose或which。如什么都不缺用that，whether表“是否”。主語(yǔ)從句注意事項(xiàng)Part31.主語(yǔ)從句一般放在句首,但有時(shí)為了使句子結(jié)構(gòu)平衡,避免“頭重腳輕”,常用it作形式主語(yǔ),而把從句放在后面。1.Thattheearthmovesaroundthesuniswellknown.

Itiswellknownthattheearthmovesaroundthesun.2.Thatshehasmadesuchamistakeisapity.

Itisapitythatshehasmadesuchamistake.3.Whetherhe'llcomehereisn'tclear.

Itisn'tclearwhether/ifhe'llcomehere.注意：主語(yǔ)從句位于句首時(shí),不能用if

引導(dǎo),主語(yǔ)從句后置時(shí),才可以用if引導(dǎo)。It作形式主語(yǔ)的常見(jiàn)句型:(1)It+be+形容詞（obvious,true,surprising,wonderful,possible,likely,certain)+that從句(2)It+be+過(guò)去分詞(said,reported,thought,expected,decided,announced,suggested等)+that從句(3)It+be+名詞詞組(apity,ashame,goodnews,anhonor,nowonder等)+that從句(4)It+動(dòng)詞/動(dòng)詞短語(yǔ)(seem,appear,happen,matter,turnout,occurto等)+that從句1.Itisafactthathecheatedintheexam.2.Itseemsthatheisnothimselftoday.3.Itisnecessarythatwe(should)

havebreakfast.4.Itwassuggested

thatwe

(should)putoffthemeeting.◆Itisnecessary/important/essential/vital/crucial/strange/natural等+that（should）do◆Itissuggested/requested/desired/ordered/demanded等+that從句（should）do翻譯下列句子:接虛擬語(yǔ)氣的主語(yǔ)從句:2.主語(yǔ)從句語(yǔ)序Whenwillhecomeisnotknown.Whenhewillcomeisnotknown.√×主語(yǔ)從句一律用陳述語(yǔ)序，即主語(yǔ)在前，謂語(yǔ)在后。例如：Whethertheywouldsupportuswasaproblem.Whatshesaidistrue.Wheresheisfromisunknown.Whentheywillstartisnotknownyet.3.主語(yǔ)從句的主謂一致問(wèn)題1.Thathewillpasstheexamiscertain.2.WhichbookIshallchoosehasn'tbeendecided.3.Howshekeepshealthyisasecret.4.Whentheywillstartandwheretheywillgo_____(be)stillunknown.are當(dāng)單個(gè)主語(yǔ)從句充當(dāng)句子主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞用單數(shù)；當(dāng)兩個(gè)或兩個(gè)以上的主語(yǔ)從句充當(dāng)主語(yǔ)時(shí)，謂語(yǔ)動(dòng)詞用復(fù)數(shù)。4.what與that在引導(dǎo)主語(yǔ)從句時(shí)的區(qū)別1._______yousaidyesterdayisright.2._______sheisstillaliveisexciting.3._______helostthebikeworriedhimalot.4._______helostyesterdayishisbike.WhatThatWhatThatwhat既引導(dǎo)從句，又在從句中充當(dāng)主語(yǔ)、賓語(yǔ)或表語(yǔ)，而that只引導(dǎo)從句，不在從句中充當(dāng)成分。鞏固練習(xí)Part41.Matchthesentenceparts.（P53）1.

remainsanunansweredquestion.2.

isanimportanttopicforustoresearch.3.

isthatthesechemicalsmayevencausecancer.4.

thesevegetablescanevenbeplantedwithoutanysoilthroughthisnewtechnology.5.

isthereasonwhysomepeopleprefertoliveinthecountryratherthaninthecity.A.WhatworriesmanypeopleB.ThatthelifestyleisslowerandhealthierC.HowwecanfindasuitablesolutiontoproducesufficientfoodD.WhenthesewheatfarmerswilljointhispilotexperimentE.ItamazedallofusthatDCAEB1.________hewillsucceediscertain.2.________hewillgothereisstillamystery.3.________hesaidisnottrue.4.________willhappentotheworldisdifficulttopredict.5.___________wewillgocampingtomorrowdependsontheweather.6._______willtaketheplaceofouroriginalheadmasterhasn’tbeendecidedyet.7._______hegaveupthechanceofstudyingabroadisunknown.8.________wewillhavethepicnicnextweekisbeingdiscussed.9.____________________________hehidthemoneyistobefoundout.10.________willbechosenournewmonitorisstillunknown.11.Itisbynomeansclear_____thepresidentcandotoendthestrike.12.Itremainstobeseen__________thenewlyformedcommittee'spolicycanbeputintopractice.13._______youneedisagreatteacherwholetsyoumakemistakes.2.Filltheblankswiththerightwords.ThatWhetherWhatWhere/When/How/WhyWhowhetherwhatWhatWhatWhetherWhoWhyWhen/Where3.Completethesentences.1._______________________________________________(為什么恐龍突然消失)stillremainsamystery.2._____________________________________________________(你和同學(xué)相處是否融洽)willaffectyoumood.3.Thetravelerlosthiswayinthewoods,and(令事情更糟糕的是天快黑了)______________________________________________________________.4.________________________(很奇怪)themanshouldhavestucktohissillyideas.Whydinosaurssudde