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1、OncetherewastrueloveformebutIdidnottreasureit.Whenitslippedawaybetweenmyfingers,Ibegantoregret.Thatisthesaddestthinginlife.IfGodcouldgivemeasecondchance,Iwouldtellthegirl,"Iloveyou!".Ifthereshouldbeatimelimitonthislove,Iwishitwouldbe1000years.条件状语从句在句子中充当条件状语的从句条件状语从句常由if,when,unless,incase,
2、onconditionthat,aslongas,provided(that),providing(that),suppose(that),supposing(that),ifonly(要是…就好了),onlyif（只要，只有）等连词引导。if引导的条件状语从句Openyourbook,andfindoutadverbialclausesofconditionintroducedby“if”.Toshowcommonsituations.表示普遍现象，常见习惯usethepresenttenseinbothpartsofthesentence.主句和从句都用一般现在时态。get
3、upearlywillgettoschoolontimeIfyougetupearly,youwillgettoschoolontime.Youwillgettoschoolontimeifyougetupearly.feelnervouswillfalloffthestringIfyoufeelnervous,youwillfalloffthestring.Youwillfalloffthestringifyoufeelnervous.pullhertailwilleatyou.Ifyoupullhertail,itwilleatyou.Itwilleatyouifyoupu
4、llhertail.berichwillloveyouIfyouarerich,Iwillloveyou.Iwillloveyouifyouarerich.if引导的条件状语从句Futuresituation表示将来的可能性主句用一般将来时，从句要用一般现在时。简称：主将从现。Exercises1.如果你再努力些，你将会通过考试。Ifyou_____(work)harder,you_________(pass)theexams.2.如果你请他帮忙，他将会帮助你。Ifyou_____(ask)him,he________(help)you.3.如果明天下雨，我们就不去公园。We_
5、_______(notgo)totheparkifit_____(rain)tomorrow.workwillpassaskwillhelpwon'tgorains类似于if的条件状语从句的引导词unless（除非；如果不）=ifnotas long as（只要）Supposing（假设）on condition that（条件是）in case（万一）我将接一些钱给你，条件是准时归还。I'lllendyousomemoneyonconditionthatyoumustreturnittomeontime.Unless=ifnotP26，activity2___youdon’t
6、workhardyouwillfail.Youwillfail____youworkhard.Youcan’tseethestar___youcan’tbethereontime.Youcan’tseethestar___youbethereontime.IfUnlessUnlessIf高考题(抄下来)2013，重庆___wehaveenoughevidence,wecan’twinthecase.A.onceB.AslongasC.unlessD.since2013,江西Shesaysthatshe’llhavetoclosetheshop___thebusinessimpr
7、oves.A.ifB.unlessC.afterD.when有些条件句可省略某些成分或改成短语：1.Ifnecessary,ringmeathome.2.Hewillcomeifasked.3.Hewouldneverdothisunlessforced.1.Ifitisnecessary,ringmeathome.2.Hewillcomeifheisasked.3.Hewouldneverdothisunlessheisforced.5.让步状语从句引导让步状语从句的连词有：1.altho
