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1、外研版 选修7 模块2 主语从句,1.定义：用作主语的从句叫做主语从句。,2.构成：关联词+简单句,3.引导主语从句的关联词有三类：,(1)从属连词that.如：That they were in truth sisters was clear from the facial resemblance between them.,很明显,她们确是亲姐妹,她们的脸型很相似。,（2）从属连词whether.,Whether hell come here isnt clear.,他是否会来这里还不清楚。,（3）连接代词who,whom,whose,what,which,whoever,whatever
2、,whichever 连接副词 where,when,how,why.,What she did is not yet known.,她干了什么尚不清楚。,How this happened is not clear to anyone.,这事怎样发生的,谁也不清楚。,Whoever comes is welcome.,不论谁来都欢迎。,Wherever you are is my home my only home.,你所在的任何地方就是我的家我唯一的家。,1.主语从句能用it作形式上的主语。常以 it作形式主语的句型有：,A.It+be+形容词（obvious,true,natural,s
3、urprising,good,wonderful,funny,possible,likely,certain,probable,etc.）+that从句。如：,It is certain that she will do well in her exam.,毫无疑问她考试成绩会很好。,It is probable that he told her everything.,很可能他把一切都告诉她了。,B.It+be+名词词组（no wonder,an honour,a good thing,a pity,no surprise,etc.）+that从句。如：,Its a pity that we
4、 cant go.,很遗憾我们不能去。,Its no surprise that our team should have won the game.,我们没赢这场比赛真意外。,C.It+be+过去分词（said,reported,thought,expected,decided,announced,arranged,etc.）+that从句。如：,It is said that Mr.Green has arrived inBeijing.,据说格林先生已经到了北京。,It is reported that China has sent anotherman-made earth satel
5、lite into orbit.,据报道中国又成功地发射了一颗人造地球卫星。,D.It+seem,happen等不及物动词及短语+that从句。,It seems that Alice is not coming tothe party at all.,Alice似乎不来参加晚会。,It happened that I was out that day.,碰巧我那天外出了。,E.It+doesnt matter（makes no difference,etc.）+连接代词或连接副词 引起的主语从句。如：,It doesnt matter whether she will come or not
6、.,她是否来这无关紧要。,It makes no difference where we shall have the meeting.,我们在哪里开会毫无区别。,F.当that引导的主语从句出现在疑问句中时,要以it作形式主语,而把主语从句后置。,Is it true that the scientist will giveus a lecture next week？,下周那位科学家将给我们作报告是真的吗？,Does it matter much that they will not come tomorrow？,他们明天不来很要紧吗？,G.当主语从句出现在感叹句中时,要以it作形式主语,
7、而把主语从句后置。,How strange it is that the children are so quiet！,孩子们这么安静真奇怪！,2.注意连接代词whoever,whatever,whichever等引导主语从句的含义,Whoever comes will be welcome.,来的人将受到欢迎。,（whoever=the person who）,Whatever he did was right.,（whatever=the thing that）,他所做的事情是正确的。,Whichever of you comes in will receive a prize.,（whi
8、chever=anyone of you who）,你们当中不论哪个进来将会得到奖励。,典型例题_ is a fact that English is being accepted as an international language.(NMET 1995)A.There B.This C.That D.It,D,当名词从句在句中作主语时，为避免句子头 重脚轻，常用it作形式主语置于句首，而将真 正的主语从句放在句尾。此时it只起先行引导 作用，本身无实 义。此句也可以改写为：That English is being accepted as an international langua
9、ge is a fact.,2._leaves the room last ought to turn off the lights.(MET1988)A.Anyone B.The person C.Whoever D.Who,C,本题句子的意思是：无论谁最后离开房间一定要把灯关掉。本题考查连接代词whoever引导的名词性从句，连接代词whoever可以引导名词性 从句，并在从句中作主语，相当于any person who或The person who,意为“一切的人”。而anyone和the person均非连词，不能引导从句，况who leaves the room last意为“某个最
10、后离开房间的人”，与题意不符，如果要选A.Anyone或B.The person，都必须在它们后面再加上引导定语从句的关系代词who。如果要选D.Who就体现不出“无论谁”的含义了。,I read about it in some book or other，does it matter _ it was？（2001春季招生）Awhere Bwhat Chow Dwhich,D,这是一个主语从句。主语从句中缺少表语。从上句的意思分析，应是哪本书，所以要填which，这句话的意思是“我在某本书中读到过有关这方面的内容，是哪一本书重要吗？”。,牛刀小试,1._that they found an
11、unusual plant in the forest.A.It is said B.They are said C.It said D.It says2._ caused the accident is still a complete mystery.A.What B.That C.How D.Where,A,A,3.It worried Mary a lot _ she would pass the college entrance examination.A.whether B.if C.that D.how 4.Shanghai has taken on a new look.It isnt like _ it used to be.A.what B.how C.that D.which,A,B,5._ is no possibility _ Bob will win the first prize in the match.A.There,that B.It,that C.There,whether D.It,whetherThe answer:,A,Thankyou,
