单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,Unreal conditionals,虚拟语气中的非真实条件句,长郡梅溪湖中学 张梦林,Grammar and usage,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,Observe the following sentences and tell,whether they are real or unreal,conditional clauses.,If we,go on,polluting the world,it,wont be,fit for us to live in.,If you,are busy doing,your homework,I wont interrupt you.,If you,have finished,cleaning the classroom,you can go home now.,(Under these conditions,the things are sure to happen.),If there,were,a lot of good restaurants in the city,this,would make,it more attractive.,(There arent many good restaurant now.),If a lot of people,spoke,English,it,would be,very helpful for tourists.,(Not many people can speak English now.),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,从句谓语形式,主句谓语形式,例句,表示与现在事实相反,If I,were,rich,I,would buy,a plane.,If we,left,now,we,should arrive,in good time.,动词的过去式（,be,动词一般用,were,）,would/should/could/might+,动词原形,从句谓语形式,主句谓语形式,例句,表示与过去事实相反,I didnt see you when you passed me in the street.If I,had seen,you,I,would have said,hello.,would/should/could/might+have+,过去分词,had+,过去分词,从句谓语形式,主句谓语形式,例句,表示与将来事实相反,If you,lived,there for a while,you,would change,your mind about that place.,If I,were to do,the job,I,might do,it in a different way.,If it,should rain,tomorrow,the picnic,would be cancelled,.,would/should/could/might+,动词原形,动词的过去式（,be,动词一般用,were,）,were to+,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.Ken got to the station in time to catch his,train.If he _(miss)it,he,_,(be)late for his interview.,2.I think there are too many cars.If there,_(not,be)so many cars,there,_,(not,be)so much pollution.,would/could/might/should have been,had missed,werent,wouldnt/couldnt/mightnt/shouldnt be,3.A:How was your holiday?,B:It was OK,but we _,_(enjoy)it,more if the weather _(be)better.,4.A:Is Jim going to take the examination?,B:No.If he _(take)the examination,he _(fail).,would/could/might/should have enjoyed,had been,took,would/could/might/should fail,