備考2025屆高考英語一輪復(fù)習(xí)考點(diǎn)通關(guān)第二部分學(xué)透語法突破句法篇專題五三大從句考點(diǎn)二名詞性從句

考點(diǎn)二名詞性從句一、從屬連詞連接詞that1.在從句中不作成分，也無詞義；2.引導(dǎo)賓語從句時(shí)可省略；引導(dǎo)主語從句、表語從句、同位語從句時(shí)，不行省略。if主要引導(dǎo)賓語從句，有時(shí)引導(dǎo)主語從句whether引導(dǎo)主語從句、賓語從句、表語從句、同位語從句asif/asthough引導(dǎo)表語從句because引導(dǎo)表語從句連接代詞who（ever），whom（ever），what（ever），which（ever），whose引導(dǎo)主語從句、賓語從句、表語從句、同位語從句連接副詞when，where，why，how引導(dǎo)主語從句、賓語從句、表語從句、同位語從句Whatmatterstoamuseumisnothowmanyvisitorsithas，buthowcloseitistopeople’sdailylives.[北京高考，26]Janemovedaimlesslydownthetree-linedstreet，notknowingwhereshewasheading.Pickyourselfup！Courageisdoingwhatyouareafraidtodo.Unfortunately，ImissedthiseventforthereasonthatIhadtovisitmygrandma.點(diǎn)撥學(xué)生看到reason，易錯(cuò)填why，但在該句中，空后內(nèi)容"Ihadtovisitmygrandma"是說明reason的內(nèi)容，所以空處引導(dǎo)同位語從句，應(yīng)填that。[江蘇高考，21]Byboatistheonlywaytogethere，whichishowwearrived.Whethertheirweddingceremonywillbeheldintheopenairtomorrowdependsontheweather.We’vegotacoupleofparticipantsintheteam.Theproblemiswhocancompletethischallengingtask.二、主語從句1.從句作主語時(shí)，主句謂語動(dòng)詞一般用單數(shù)。Whatsheofferstoherclassmatesis（be）honestyandhappiness.2.it作形式主語：句型句型中常用的詞或詞組It＋be＋形容詞＋從句clear，certain，obvious，important，likely，necessary，possible等It＋be＋名詞（詞組）＋從句ashame，apity，anhonour，nowonder，goodnews等It＋be＋過去分詞＋從句said，reported，thought，known，believed，expected，concluded等It＋特別動(dòng)詞（短語）＋從句doesn’tmatter，occurstosb.，makesnodifference等Itispossiblethatcaffeinemaycausebirthdefects（缺陷）inhumans，too.Itisapitythatwelostsuchanimportantcustomer.ItisbelievedthattheinsectshavespreadtoEuropebeforecrossingovertosub-SaharanAfrica.Itdoesn’tmatterwhetheryougototheGreatWallorthePalaceMuseum—wehaveenoughtimetoexplorethisamazingcity.三、賓語從句1.it作形式賓語：findIthinkitnecessarythatwedrinkplentyofboiledwatereveryday.Ishallseetoitthatheistakengoodcareofwhenyouareabsent.2.表示情感或看法的形容詞后可接賓語從句，如confident，convinced，surprised，anxious等。Iwassurprisedthatsheshouldthrowawaythenecklacefromherboyfriend.3.一般狀況下介詞后只能接wh-類連接詞引導(dǎo)的賓語從句。[江蘇高考，26]Wechoosethishotelbecausethepriceforanighthereisdownto$20，halfofwhatitusedtocharge.四、表語從句1.asif/asthough。asif/asthough意為"似乎，仿佛"，其引導(dǎo)的表語從句常位于系動(dòng)詞之后，從句有時(shí)用虛擬語氣。Ifeltasifwehadknown（know）eachotherforyears.2.because/why。常用于以下句式中：ThisUnlikeordinarypaper-makingwheretreesneedtobecutdown，Daipaperisenvironmentallyfriendly.Thisisbecauseitsrawmaterialistherecyclablebarkofakindoftreesuniquetothearea.五、同位語從句同位語從句前的名詞通常是表示抽象意義的名詞：fact，news，idea，truth，hope，problem，information，belief，thought，doubt，suggestion，question等。同位語從句用于對(duì)這些名詞作進(jìn)一步的說明或說明。IhavesentMissGreenaninvitationtoourparty，butIhavenoideawhethershewillacceptit.Housewarmingpartiesgettheirnamefromthefactthatalongtimeagopeoplewouldactuallybringfirewoodtoanewhomeasagift.六、易混連接詞1.that/what在從句中充當(dāng)成分含義that不充當(dāng)成分無含義what充當(dāng)主語、賓語、表語、定語意為"什么，……的事情，什么樣的"Contrarytowhatmanypeoplethink，HIVcannotbetransmittedthroughmosquitoes，coughsorsneezes.Don’tbesad.Themostimportantthingisthatwemustlearnfromourmistakesandmoveon.2.whether/if二者在動(dòng)詞后引導(dǎo)賓語從句時(shí)，通?？苫Q，但在下列狀況下，只用whether：特別狀況例句與ornot干脆連用時(shí)Idon’tknowwhetherornottheywillcome.我不知道他們是否會(huì)來。作介詞的賓語時(shí)Everythingdependsonwhetherwehaveenoughmoney.一切都取決于我們是否有足夠的錢。引導(dǎo)主語從句且從句位于句首時(shí)Whetherthesportsmeetingwillbeheldontimedependsontheweather.運(yùn)動(dòng)會(huì)是否會(huì)按時(shí)實(shí)行取決于天氣。引導(dǎo)同位語從句時(shí)Ihavenoideawhetherheiswillingtohelpus.我不知道他是否情愿幫我們。Itremainstobeseenwhetherornotthisideacanbeputintopractice.[天津高考，4]Sheaskedmewhether/ifIhadreturnedthebookstothelibrary，andIadmittedthatIhadn’t.1.WhatmakestheHarbinInternationalIceandSnowFestivalspecialisthescaleofthesculpturesandthebeautifullighting.2.AfterconsideringcarefullywhereIcouldfindmyfirstidealjob，IchoseChina.3.ThenewsspreadquicklyallovertheworldthatMichaelSchumacherrevivedafterbeingseriouslyinjuredfor5years.4.Nowtherouteisnolongerusedforinternationaltradebutmuchhistoryandmanystoriesofwhathappenedontheancientroadremain.5.Whoeverpassesherewouldstoptoadmirethescenery.6.Itwasexpectedthatover100，000peoplewilltakepartinthemassiveparadeinTian’anmenSquareonthemorningofOct.1.7.TheGreenRevolutionisagoodexampleofhowtechnologicaladvancescanhaveagreateffectoneconomicdevelopment.8.Hedidnotseethefilmlastnight.Thatisbecausehehadtohelphislittlesisterwithherhomework.9.Eatwhichevercakeyoulikeandleavetheotherforwho/whoevercomeslate.10.Nowadays，moreandmoreparentsarediscussingwhether/ifmorefreedomandencouragementshouldbeprovidedfortheirchildren.11.Nowadaysconsumersbecomemoreandmorepracticalandonlybuywhattheyneed.12.Thesyrup（糖漿）finallyturnsintoasolidcoating，likethecrystalonthesurfaceofhaws（山楂果）.Thatiswhytheyarealsocalledbingta