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《虚拟语气在if条件从句中的用法》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、虚拟语气在if条件从句中的用法在if引导的虚拟条件句中，若表示与现在事实相反，从句谓语用“动词过去式（be的过去式用were）,主句谓语用“would(should,could,might)+have+过去分词”；若表示与将来事实相反，从句谓语用“动词过去式（wereto+动词原形，should+动词原形）”，主句谓语用“would(should,could,might)+动词原形”。若把从句中were,should或had移到句首，可省略从句的连词if并使用倒装语序.①Ifmylawyer___herelastSaturday,he____me
2、fromgoing.(NMET’89)A.hadbeen;wouldhavepreventedB.hadbeen;wouldpreventC.were;wouldpreventD.were;wouldhaveprevented②---Ifhe____,he____thatfood.--Luckilyhewassenttothehospitalimmediately.(MET’93)A.waswarned;wouldnottakeB.hadbeenwarned;wouldnothavetakenC.wouldbewarned;hadnottaken
3、D.wouldhavebeenwarned;hadnottaken③Ididn’tseeyoursisteratthemeeting.Ifshe___,shewouldhavemetmybrother.(NMET’94)A.hascomeB.didcomeC.cameD.hadcome④____itraintomorrow,wewouldhavetoputoffthevisittotheYangpuBridge.(1994,上海)A.WereB.shouldC.WouldD.Will2．考查通过上下文或介词短语表示虚拟条件的虚拟语气的用法在英语中
4、，有时假设的条件不是通过if条件句表达出来，而是通过上下文或without,butfor等介词构成的短语表达，其谓形式要根据所假设的时间，与if从句所表达的时间对应，确定主句谓语形式。[考例]⑤Withoutelectricityhumanlife____quitedifferenttoday.(NMET’91)A.isB.willbeC.wouldhavebeenD.wouldbe⑥ItoldSallyhowtogethere,butperhapsI____forher.(NMET’94)A.hadtowriteoutB.musthavewri
5、ttenitoutC.shouldhavewrittenitoutD.oughttowriteitout⑦withouttheairtoholdsomeofthesun’sheat,theearthatnight___,toocoldforustolive.(1997,上海)A.wouldbefreezingcoldB.willbefreezingcoldlyC.wouldbefrozencoldD.canfreezecoldly3.考查虚拟语气在asif引导的方式状语或表语从句中的用法Asif引导的方式状语或表语从句，谓语动词用“一般过去式”表
6、示与现在事实相反；用“would(might,could)+动词原形”表示与将来事实相反。]⑧Thetwostrangerstalkedasifthey____friendsforyears.(1993,上海)A.shouldbeB.wouldbeC.havebeenD.hadbeen⑨Whenapencilispartlyinaglassofwater,itlooksasifit_____.(NMET’95)A.breaksB.hasbrokenC.werebrokenD.hadbeenbroken4.考查虚拟语气在wish后面宾语从句的用法W
7、ish后面的从句，谓语用“过去式”表示现在不能实现的愿望；用“had+过去分词”表示过去没有实现的愿望；用“would(should,could)+动词原形”表示将来不能实现的愿望。[考例]⑩IwishI_______youyesterday.(Met”88)A.seenB.didseeC.hadseenD.weretosee5．考查虚拟语气用于宾语从句的用法。在及物动词insist,order,require,demand,command等后面，宾语从句所说的是尚未发生的事，所以谓语要用与将来事实相反的虚拟语气，即“should+动词原形”表达
8、。其中should可以省略。考例（11）Theguardatthegateinsistedthateverybody_______the
