條件狀語從句

條件狀語從句

ConditionClauseIf…Unless…Aslongas…onconditionthat……if如果1.1if后面的時(shí)態(tài)問題真實(shí)條件Ifitrainstomorrow,thegamewillbepostponed.非真實(shí)條件（虛擬條件句）*IfIwereyou,Iwouldseizetheopportunity.*Ifthestudenthaddoneproperrevision(復(fù)習(xí)),hewouldnothavefailedthetest.1.2.特殊用法

1.2.1evenif轉(zhuǎn)折+假設(shè)條件(usedtoemphasizethat,althoughsomethingmayhappenormaybetrue,itwillnotchangeasituation)Evenifshesurvives,she’llneverfullyrecover.Themedicalteammembersaredeterminedtorescuepeopleindisease-strickenareas,evenifitmeansthembeinginfected.

1.2.2if和形式賓語連用（主句動(dòng)詞包含喜怒）Shewon’tlikeitifyouarrivelate.IwouldappreciateitifyoucouldlendmeyourE-dictionary.Iwouldpreferitifyoudidn’tsmokeinhere.HehatesitifpeoplecallhimFatty.1.2.3if從句的簡化1)ifitispossible/necessary=ifpossible/necessaryTastethesoupandaddsaltandpepperifnecessary.Iwanttogetbackbyfiveo’clockifpossible.

2)ifso&ifnotifsoHemaybebusy;ifso,Iwillcalllater.(ifso=ifheisbusy)ifnotIftheadmissionisfree,Iwillgo.Notifnot.(ifnot=iftheadmissionisnotfree)*3)ifnot(usedwhenyouareaddingthatsomethingmaybeevenmore,less,better,worseetc.thanyouhavejustsaid)Johnrunsasfastas,ifnotfaster,thanJack.Thesnowwasnowtwofeetdeep,makingitdifficult,ifnotimpossible,togetthecarout.Theirpolicieshavechangedlittle,ifatall,sincethelastelection.1.3Whatif…? (如果…那會(huì)怎樣？)Whatif…=Whatwillhappenif…?“Whatifitrainstomorrow?”“We’llhavetopostponeit.”1.4ifonly(要是…就好了)Youuseifonlytoexpressawishordesire,especiallyonethatcannotbefulfilled.Ifonlyyouhadtoldmethatsometimeago.Ifonlyitwerethatsimple!'Hey,listentome,allthatnonsenseisover.'—'Ifonly,Timothy,ifonly.‘1.5usedwhenyouwanttomakeapoliterequestorremark:WouldyoumindifIopen/opened(=canIopen)thewindow?Ifyou'dliketotakeaseat,Mr.Changwillbewithyouinamoment.*1.6Wesometimesuseshouldinhypotheticalconditionalclauseswithiftoexpresspossibility.Itisformal:IfyoushouldwishtousetheInternet,thereisacodeavailableatthereceptiondesk.Ifyoushoulddecidenottogoonthetrip,youwillgetafullrefund.ShouldyouwishtousetheInternet,thereisacodeavailableatthereceptiondesk.Shouldyoudecidenottogoonthetrip,youwillgetafullrefund.2.unlessUnlessthegovernmentchangesitspolicy,theeconomywillgetworse.=Ifthegovernmentdoesnotchangeitspolicy,…Thechildwon’tgotosleepunlessyoutellhimastory.=…ifyoudonottellhimastory.注意點(diǎn)1：和until不同，unless只能是連詞，其后不加doingsth/beingdoneYoushouldremainsilentunless_youareasked__(ask)tospeak.Thechildwon’tgotosleepunless_youtell_(tell)astory.注意點(diǎn)2：unless后面符合“從現(xiàn)”的規(guī)則，不接將來時(shí)，但可以接現(xiàn)在完成時(shí)。Unlesssomeextramoneyisfound,thetheatrewillclose.Iwon’tchangeanythingunlesssomeonehasaskedmeto.表達(dá)過去的事情時(shí)，也可用過去式：Theythreatenedtokillhimunlesshegavethemthemoney.3.as/solongas:只要Aslongaswekeepplayingwell,we’llkeepwinninggames.Youcangoouttoplayaslongasyoustayinthebackyard.*注意點(diǎn)：aslongas還可以表示“為了能長久…”，前面一般會(huì)出現(xiàn)forYoucanstayforaslongasyouwant.Shetriedtostayawakeforaslongasshecould.

4.onconditionthat(=onlyifaparticularthingisagreedto)只要（同意一件事）（前提條件）Thepolicereleasedhimonconditionthathereturnthefollowingweek.Hespoketoreportersonconditionthathewasnotidentified.5.provided(that)…（前提條件）Ifyousaythatsomethingwillhappenprovidedorprovidedthatsomethingelsehappens,youmeanthatthefirstthingwillhappenonlyifthesecondthingalsohappens.Thisnewfilmwillattractthecrowds,providedthatitgetsplayedupintherightway.Iwillagreetogoprovided(that)myexpensesarepaid.

6.suppose/supposingthat…Suppose/Supposing(that)wemissthetrain,whatshallwedo?Look,supposeyoulostyourj