高中教育英语牛津译林高二下 微课 M6U3 Grammar and usage

Unrealconditionals虚拟语气中的非真实条件句,Grammarandusage,虚拟语气可用于条件句和其它一些从句中。虚拟语气用于条件句中比较多，情况也比较复杂，所以要特别加以注意。首先要判断一下是否应该用虚拟语气，因为条件句分为两种，一种是真实条件句，一种是非真实条件句，只有在非真实条件句中才用虚拟语气，在真实条件句中，要用陈述语气。,虚拟语气的介绍,Observethefollowingsentencesandtellwhethertheyarerealorunrealconditionalclauses.,Ifwegoonpollutingtheworld,itwontbefitforustolivein.Ifyouarebusydoingyourhomework,Iwontinterruptyou.Ifyouhavefinishedcleaningtheclassroom,youcangohomenow.(Undertheseconditions,thethingsaresuretohappen.),Iftherewerealotofgoodrestaurantsinthecity,thiswouldmakeitmoreattractive.(Therearentmanygoodrestaurantnow.)IfalotofpeoplespokeEnglish,itwouldbeveryhelpfulfortourists.(NotmanypeoplecanspeakEnglishnow.),非真实条件句的时态表达,如果假设的情况完全不存在或者实现的可能性很小,可以说几乎没有时,就需要用虚拟语气来表达,也就是说,这时的条件句是非真实的条件句。此时的句子时态比真实条件句中的时态后退一步。,虚拟语气,条件从句和主句中的虚拟语气,动词的过去式（be动词一般用were）,would/should/could/might+动词原形,would/should/could/might+have+过去分词,had+过去分词,would/should/could/might+动词原形,动词的过去式（be动词一般用were）wereto+动词原形should+动词原形,【即学即练】根据括号内的提示补全下面句子或对话。1.Kengottothestationintimetocatchhistrain.Ifhe_(miss)it,he_(be)lateforhisinterview.2.Ithinktherearetoomanycars.Ifthere_(not,be)somanycars,there_(not,be)somuchpollution.,would/could/might/shouldhavebeen,hadmissed,werent,wouldnt/couldnt/mightnt/shouldntbe,3.A:Howwasyourholiday?B:ItwasOK,butwe_(enjoy)itmoreiftheweather_(be)better.4.A:IsJimgoingtotaketheexamination?B:No.Ifhe_(take)theexamination,he_(fail).,would