名词性从句之表语从句-高三英语一轮复习.pptx

表语从句表语从句GRAMMAR IS LOGICAL!1.什么是表语？(详见句子结构章节讲解)主+系+表2.什么是表语从句？一个 充当 成分，为表语从句。事实是我们已经输了这场比赛。The fact is .句子表语we have lost the game thatGRAMMAR IS LOGICAL!1.The fact is that we have lost the game.2.What the doctor really doubts is whether he can recover from the disease.3.That mountain is no longer what it used to be a few years ago.4.My trouble is who I can turn to for help.5.That is why he didnt come to the meeting.6.It sounds as if it comes from upstairs.7.He did not go to school.Thats because he was ill.GRAMMAR IS LOGICAL!表语从句的引导词关联词含义是否作成分可否省略that无实义不作成分不可省略whether是否不作成分不可省略as if/as though似乎，好像不作成分不可省略what(ever)(无论)什么作成分不可省略who(ever)(无论)谁作成分不可省略whom(ever)(无论)谁作成分不可省略which(ever)(无论)哪一个作成分不可省略whose(ver)(无论)谁的作成分不可省略when(ever)(无论)什么时候作成分不可省略where(ver)(无论)哪里作成分不可省略why为什么作成分不可省略how怎么样作成分不可省略because因为作成分不可省略GRAMMAR IS LOGICAL!考点&难点GRAMMAR IS LOGICAL!【考点一】if不能引导表语从句解题要点：表语从句中表示“是否”用whether，不能用if。习题演练1.His first question was if Mr.Smith had arrived yet.(改错)2.The question is _ the enemy is marching towards us.whether whether GRAMMAR IS LOGICAL!【考点二】as if/as though虚拟vs现实解题要点：事情真实或极有可能发生，用陈述语气；事情不真实或极少可能发生时，用虚拟语气：1.从句表示与现在事实相反，谓语用一般过去时；（be动词用were）2.从句表示与过去事实相反，谓语用“had+过去分词”；3.从句表示与将来事实相反，谓语用“would/could/might+动词原形”。习题演练1.Look at the dark clouds.It looks as if it .(rain)2.It looks as if he .(be drunk)3.The aged man looks as if he (be)young.is going to rain were drunk were young GRAMMAR IS LOGICAL!【考点三】表语从句中的虚拟语气在一些表示“建议、劝说、命令”的名词后面的表语从句中，谓语动词用虚拟语气,即should+动词原形，should可以省略。解题要点：记住这些常见的名词，如advice、suggestion、order、command、proposal等。习题演练1.My suggestion was that we started early.（改错）2.My advice is that she goes to school as soon as possible.（改错）start go GRAMMAR IS LOGICAL!【考点四】why和because引导的表语从句。解题要点：That is because.指原因或理由，That is why.则指由于各种原因所造成的后果。即：thats because+原因，译为那是因为 thats why+结果，译为所以习题操练1.He did not see the film last night.That is he had to help his little sister with her homework.2.He had seen the film before.That is he did not see it last night.because why GRAMMAR IS LOGICAL!【考点五】The reason is that.和 It/That is because.习题演练1.The reason is because he eats too much.(改错)2.He is too fat.It is he eats too much.3.The reason why he failed the exam is he was too careless.that because that GRAMMAR IS LOGICAL!