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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,*,主语从句,主语从句,名词性从句包括：,宾语从句：介宾结构；动宾结构,表语从句：系表结构,(,系动词后面跟一个从句,),主语从句,:,一个句子做主语,同位语从句：对名词进行解释说明,名词性从句包括：,判断下列从句：,1.China,is,no longer what she used to be.,2.The question,remains,whether they will be able to help us.,3.It,seemed,as if I couldnt think of the right word.,4.,The reason why I study hard,is,that I want to go to a key university.,5.They believe in,that she must still be single.,6.I know nothing about him except,that he is living in Beijing,7.I dont know,whether hes free or not.,8.Mary asked,whether I was doing my homework or not.,9.Im thinking of,whether we should go fishing.,10.We are worried about,whether it will rain tomorrow.,表语从句,宾语从句,判断下列从句：表语从句宾语从句,(1).,连接词,：that,在句子中不充当任何成分，无意义，不可省略,That,he will win is certain.,That,he got the first prize made his parents very happy.,That,China has become strong is certain.,That,they love each other is obvious.,That,he played computer games into night made his parents disappointed.,(1).连接词：that 在句子中不充当任何成分，无意义,(2).,连接词,whether,在句中不充当成分，意为,“,是否,”,Whether,we go by train or by boat makes no difference.,Whether,life exists on other planets is not clear.,Whether,hell come here isnt clear.,Whether,the old bus station should be replaced with a modern hotel or not is under discussion.,(2).连接词 whether 在句中不充当成分，意为“,(3).,连接副词,when(,时间,),where(,哪里,),why(,为什么,),how(,怎么；如何,),有词义，在从句中担任状语。,Why,Chen Lin committed suicide has not been clear yet.,How,this happened,is not clear to anyone.,Where he found the treasure,remains a mystery.,When,we will hold the graduation ceremony,has not been decided yet.,When they will leave,is not decided.,(3).连接副词 when(时间),where(哪里),(4).,连接代词：,who(,谁，主格,);whom(,谁；宾格,);whose(,谁的,);what(,什么,事,/,话,);which(,哪一个,);whoever(,无论谁,),whatever(,无论什么,),whichever(,无论哪一个,),在句子中担任主语，宾语，表语或定语,Who,will host the meeting hasnt been decided yet.,Which,plan is better should be discussed.,Whoever,comes to China is welcome.,Whatever,you do in your spare time should do no harm to others.,Whoever,breaks the law will be punished.,(4).连接代词：who(谁，主格);whom(谁；宾格,主语从句能用,it,做,形式上的主语,(,二,),主语从句能用it做形式上的主语(二),注意,:,由,that,引导的主语从句有时为了使句子结构平衡,避免,“,头重脚轻,”,常用,it,作,形式主语,而把从句放在后面。例如,:,1.,That,he will refuse this piece of advice,is impossible.,_ _,2.,That they should like each other,is natural.,_,*,it,为形式主语,It,is natural,that,they should like each other.,It,is impossible,that,he will refuse this piece of advice.,注意:由that 引导的主语从句有时为了使句子结构平,这样就构成了下面一些常用句型,:,1)It is+n.+,从句,It is a pity/shame that.,遗憾的是,It is a surprise that,令人惊奇的是,It is a fact that ,是事实,It is common knowledge that,是常识,*,_(,很遗憾,)we lost the match.,*_(,这是事实,)he cheated in the exam.,It is a pity that,It is a fact that,这样就构成了下面一些常用句型:It is a pity t,2)It is+adj.+,从句,Its certain that,肯定,It is possible that.,很可能,It is unlikely that.,不可能,It is obvious that,很明显,It is necessary important natural.that,*_(,很可能,)she will come back tomorrow.,*_(,很明显,)this measure is effective.,+(should)+do,It is possible that,It is obvious that,2)It is+adj.+从句+(should),3)It+be+,过去分词,+,从句,It is said that.,据说,It is known to all that.,众所周知,It is reported that.,据报道,It is believed that.,据信,;,人们相信,It is suggested that+,(should,）,do,.,建议,It must be admitted that,必须承认,It cannot be denied that,不可否认,It must be pointed out that,需指出的是,*,_(,据报道,)20 people were killed in the accident.,*_(,建议,)we,should,eat more vegetable and do more exercise.,It is reported that,It is suggested that,3)It+be+过去分词+从句 It is repo,4)It+,不及物动词,+,从句,It happened that.,碰巧,It occurred to me that,我突然想起,_(,刚好,)I came into the office at that time.,_(,我突然想起,)I forget to sent the letter.,5)It+,及物动词,+,宾语,+that,从句,It worried her a bit,that,her hair was turning grey.,It shocked me,that,he didnt tell anybody where he was.,It happened that,It occurred to me that,4)It+不及物动词+从句 It happened th,主语从句中应注意的问题,主语从句中应注意的问题,(,一,).,语序应是陈述句语序,How he managed to survive in the forest,interested everyone present.,When he will come,is not known.,What he needs,is an English dictionary.,(,二,).,谓语动词的单复数,When we shall hve our sports meeting _(have)not been decided yet.What I need _(be)money.What I need _(be)books.When they will start and where they will go _(have)not been decided yet.When and where the meeting will be held _(have)not been decided.,has,is,are,have,has,(一).语序应是陈述句语序hasisarehavehas,(,三,)if/wheter,在主语从句中的用法,If,the meeting will be put off has not been decided yet.,Whether,the meeting will be put off has not been decided yet.,注意：,whether,可以引导主语从句可以放在句首，,但,if,不能,(三)if/wheter 在主语从句中的用法Whether,(,四,).,判断以下句子是否正确：,They should like each other is natural.,That they like each other is natural.,It is natural that they like each other.,错误,正确,正确,That,引导的主语从句放句首,，既不充当成分又无意义，但,that,不能省去,。,(四).判断以下句子是否正确：They should li,找出错误，并给出理由：,1.Where shall we spend the holiday isnt decided.,2.You have made a mistake is a fact.,3.If the policeman will come is not certain.,4.That is certain that we can win.,we shall,Whether,It,That you have,找出错误，并给出理由：we shallWhetherItTh,5.It is ordered we should le
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