1.Thatprobablydoesnotseemmuchtoyouorme,butitisarapidincreasewhencompared

toothernaturalchanges.Whencomparedto=whenitiscomparedto(with)狀從的省略.條件：1).主從句主語一致且從句中含be動詞時可省略狀從中的主語和be動詞。如：過馬路時要四下看看Lookaroundwhile(youare)crossingtheroad麥蒂的表現比預料的要好McGradyperformsbetterthanexpected

他張了張嘴，好像有話要說Heopenedhislipsasif(hewere)tospeak.2)當從句中的主語是it,謂語動詞又含有系動詞be是，可以把it和系動詞be一起省略。如果沒必要，你最好不要查字典Unless(itis)necessary,you’dbetternotrefertothedictionary.如果有可能，我想到月球探險Ifpossible,I’dliketoexplorethemoon.2.Thereisnodoubtthattheearthisingwarmerandthatitishumanactivitythathascausedthisglobalwarmingratherthanarandombutnaturalphenomenon.毫無疑問，地球正變得更加暖和。全球變暖是人為的，而不是隨意的自然現象毫無疑問，每個人都是獨一無二的Thereisnodoubtthateveryoneisunique.我懷疑他是否考試作弊Idoubtwhetherhecheatedintheexam.我不懷疑他會贏得這場比賽Idon’tdoubtthathewillwintherace.3.Somescientistssubscribetotheviewthattheincreaseintheearth’stemperatureisduetotheburningoffossilfuelslikecoal,naturalgasandoiltoproduceenergy.類似表達：Sb.advocates/argues/isinfavoroftheviewthat…(同位語從句)連詞that引導同位語從句時，應在某些抽象名詞之后，如：fact,hope,desire,thought,suggestion,idea,news,problem,possibility等，對前面的名詞其補充說明作用。that不做成分1.-----It’sthirtyyearssincewelastmet.----ButIstillrememberthestory,believeitornot,_____wegotlostonarainynight.A.whichB.thatC.whatD.when2.Couldyouimaginethesituations___willappearintheworkingworld?A.whereB.whenC.thatD.whatBc4.Withoutthe‘greenhouseeffect’.Theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.相當于：Ifthereweren’tthe‘greenhouseeffect’.Theearthwouldbeaboutthirty-threedegreesCelsiuscoolerthanitis.要不是這場雪，我們就能打籃球了Without/Butforthesnow,wewouldplaybasketnow.5.Itmeansthatmoreheatenergytendstobetrappedintheatmospherecausingtheglobaltemperaturetogoup1)Itmeansthat…“it”:形式主語很可能周四濟南要下雪Itisverylikely/probablethatasnowwillfallonJinanonThursday.==AsnowisverylikelytofallonJinanon..2)把。。。留存/儲存(holdandkeepgas,water.Etcsothatitcanbeusedlater)Solarpanelscantrapthesun’sheat太陽能電池板能儲存太陽的能量1.Tenminersweretrappedunderground2.Thepolicetrappedtheterroristsataroadblock.3.Iwastrappedintosigningaconfession.(供詞)4.Aboyhadhisfingerstrappedinthedoor.trap的其他意思困使陷于羅網，把（某人）逼入困境誘騙，誘使被夾住；被壓扁6.Theyalsoagreethatitistheburningofmoreandmorefossilfuelsthathasresultedinthisincreaseincarbondioxide.1)強調句的一般疑問句Itwasin1939thattheSecondWorldWarbrokeout.Wasitin1939thattheSecondWorldWarbrokeout?2)強調句的特殊疑問句Whowasitthatbrokethewindow?3)強調句在復合句中做某一成分Tellmewhoitwasthatbrokethewindow.1）區分強調句與其他從句ItwasonOct.1st,1949_____ThePeople’sRepublicofChinawasfoundedItwasOct.1st,1949_____ThePeople’sRepublicofChinawasfounded2)強調句型與Itis+時間+since…Itwastwoyearsago______IbegantolearnEnglish.Itistwoyears______IbegantolearnEnglish.thatwhenthatsince3)Itwon’tbelong_________Imeetyou.4)Itisthefirsttime________I’vebeentoHongkong.beforethat7.It’sOKtoleaveanelectricalapplianceon

solongasyouareusingit.Ifnot,turnitoff!1.我們還可用ifnot/so/any/ever代替上文.如：你去過濟南嗎？如果去過的話，濟南的泉水一定留給你深刻的印象HaveyoueverbeentoJinan?Ifever,youmustbedeeplyimpressedwithspringsthere.明天得早起。如果不早起，你就要遲到了Getupearlytomorrow.Ifnot,you’llbelate-ArethereanybooksaboutEnglishlearning?--Ifany,thereareonlyafewleavetheelectricalapplianceonLeave+賓語+賓補:使（