1、The Subject Clauses主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。1.主语从句的连接词1).连接词:that,whether(1).That he will win is certain.(2).Whether hell join us in the discussion is of great importance.2).连接代词:who,what,which,whom,whose,whoever,whatever,whichever(1).It is clear who is afraid of having a c
2、hange in land ownership.(2).What India needs is a law to make land ownership fairer.3).连接副词:when,where,why,how,how many,how much,how long,how soon,how often(1).When well start tomorrow will be told soon.(2).Where we can buy oxen is something we need to find out.(3).Why he came here is not known.(4).
3、How we can protect the grain from damp needs to be discussed.主语从句三要素 he became a great scientist is known to us all.Is what you told me really true?谓语动词用单数从句用陈述语序不能省略关联词Notice:What we need most are books.How用用it it 作形式主语的结构作形式主语的结构(1)(1)(1)It is 名词 从句It is a fact that 事实是It is an honor that 非常荣幸It i
4、s common knowledge that 是常识(2)It is 形容词 从句It is natural that 很自然It is strange that 奇怪的是用用it it 作形式主语的结构作形式主语的结构(2(2)(3)It is 不及物动词 从句It seems that 似乎It happened that 碰巧It appears that 似乎(4)It 过去分词 从句It is reported that 据报道It has been proved that 已证实 It is said that 据说“ItIt”作形式主语代替主语从句的常见句型举例作形式主语代替主
5、语从句的常见句型举例（一）（一）Its+adj.+that/wh-clauseItsclear/natural/certain that clausee.g.Its obvious that money doesnt grow on trees.Its +p.p.+that/wh-clauseIts said/reported/known that clausee.g.Its believed that he will come next week.“ItIt”作形式主语代替主语从句的常见句型举例作形式主语代替主语从句的常见句型举例（二）（二）It s+n.+that/wh-clauseIts
6、 a shame/an honour/good news that clausee.g.Its still a question when well have our meeting.It +v.(n./pron.)that/wh-clausee.g.It made us very happy that she was chosen.It appears that he forgot to sign the letter.Exercises:Part One:主语从句单选题1.has helped to save the drowning girl is worth praising.A.Wh
7、o B.The one C.Anyone D.WhoeverD2.It was he saiddisappointed me.A.what;that B.that;that C.what;what D.that;whatA3.well go camping tomorrow depends on the weather.A.If B.Whether C.That D.WhereB4.he said at the meeting surprised everybody present.A.What B.That C.The fact D.The matterA5.we cant get seem
8、s better thanwe have.A.What;what B.What;that C.That;that D.That;whatAPart Two:改错1.He doesnt like them is very clear.(That he)2.That has happened proves that my advice is right.(What has)3.What a pity it is because you didnt arrive by daylight.(What a pity it is that you)4.Because of my poor memory,t
9、hat you told me has been forgotten.(what you/all that you)5.If he has signed his name doesnt matter.(Whether)6.What is most important in life arent money.(isnt)Part Three:单选1.was to return to school.A.That really interested him B.What really interested himC.Which really interested him D.That interes
10、t him reallyB2.makes mistakes must correct them.A.What B.That C.Whoever D.WhateverC3.your men have been on my land without permission.A.It seems that B.There seems to be C.That seems D.It seems forA4.It has always puzzled methe old man lied a red silk ribbon on the young tree.A.that B.why C.where D.whatB
