类用法例句别从句动词：过去式（be用were）与现在事实相反主句动词：Ifhewerehere,hewouldhelpus.Ifshould/would/could/might+do引导从句动词：had+done的与过去事实相反主句动词：IfIhadbeenfree,Iwouldhavevisitedyou.条should/would/could/might+have+done件从从句动词：过去式/should+动词原形句/were+todo与将来事实相反Ifitshouldraintomorrow,wewouldnotgocamping.主句动词：should/would/could/might+动词原形省略if①Shouldhecome,tellhimtoringmeup.的将虚拟条件从句中的were，had,should放到主语之前，构虚②成主谓倒装WereIyou,Iwouldnotdoit.拟条③HadIbeenfree,Iwouldhavevisitedyou.件句①Ifhehadlistenedtome,hewouldnotbeintroublenow.混不同时间的虚拟：各遵守各的规则②Ifhehadtoldmeyesterday,Ishouldknowwhatto合donow.虚拟③IfIwereyou,Iwouldhavegonetoherbirthdayparty.条件①Hecouldhavepassedtheexam,buthewasn’tcareful句enough.虚拟与陈述的混合：各遵守各的规则②Youshouldhavecomeearlier.Thebusleftamomentago.if引导的虚拟语气用法与例句Ifheisout,I’llcalltomorrow.第1页共2页You’llmissthetrainifyoudon’thurry.Itwon'tbeeasyforyoutodrawhimin.你要把他拉进来可不容易。Theyagreedtoestablishaworkingpartytodrawupaformalagreement.他们同意成立一个工作组来起草一份正式
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。todrawofftheforces撤退部队It'stoolatetodrawbackfromtheplan.现在要退出那计划已为时太晚。WefinallyarrivedinRome.我们终于到达罗马。HearrivedinEnglandsafeandsound.他安全到达英国。Theyputforwardsomenewideasonthesubject.他们对这个问题提出了一些新的见解。第2页共2页
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