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1、名词性从句在句子中起名词作用的句子叫名词从句(Noun Clauses） 。名词从句的功能相当于名词词组,它在复合句中能担任 主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、 宾语从句、表语从句和同位语从句。 引导名词性从句的连接词可分为三类：引导名词性从句的连接词可分为三类：纯连接词：that, whether, if 不充当从句的任何成分 连接代词：what, whatever, who, whoever, whom, whose, which. 连接副词：when, where, how, why主语从句1 定义：当作主语的成分变成句子
2、时2 连接词(1) 纯连词 that、whether That you dont like him has nothing to do with me. Whether hell come here isnt clear. Whether she comes or not makes no difference.注：that 不可以省略 That I am a teacher is clear.(有歧义)(2)连接代词 who, whom, whose, what, which, whoever, whatever, whicheverWhat she did is not yet known
3、. Whoever comes is welcome.(3)连接副词 where, when, how, whyHow this happened is not clear to anyone. Wherever you are is my home - my only home. 3it 作形式主语(1). It+be+形容(obvious,important ,necessary, true, natural, surprising, possible, likely, etc.)+that 从句It is certain that she will do well in her exam
4、. It is probable that he told her everything. 注：注： important ncecssary obvious 用虚拟语气，用虚拟语气，从句用从句用 should +do It is important that you (should )go to school on time.(2) It+be+名词词组(no wonder, a fact ，an honour, a good thing, a pity, no surprise, etc.)+that从句Its a pity that we cant go. Its no surprise
5、that our team won the game.(3) It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。It is said that Mr. Green has arrived in Beijing. It is reported that China has sent another man-made earth satellite into orbit.注：注：suggest，order ，command ，insist，etc.用虚拟语气，从句用用虚拟
6、语气，从句用 should +do It is suggested that you (should )go to school on time.(4)It+seem, happen appear matter makes no difference occurred comes about 等不及物动词及短语+that 从句。如：It seems that Alice is not coming to the party at all. It happened that I was out that day. It doesnt matter whether she will come or
7、 not. It makes no difference where we shall have the meeting. 4 特别提示当主从出疑问句时，要以 it 作形式主语，而把主语从句后置Is it true that the scientist will give us a lecture next week? Does it matter much that they will not come tomorrow? 当主从出感叹句中时，而把主语从句后置How strange it is that the children are so quiet! 5 定从与 名从Whoever c
8、omes will be welcome. Whatever he did was right. Whichever of you comes in will receive a prize. (whoever=the person who) (whatever=the thing that) (whichever=anyone of you who)主语从句第一类：it 作形式主语1 江苏 It was never clear _ the man hadnt reported the accident sooner.A that B how C when D why2 湖南 Before a
9、 problem can be solved, it must be obvious _the problem itself is. A what B that C which D why 3 重庆. It is still under discussion _the old bus station should be replaced with a modern hotel or not.A. Whether B. when C. which D. where4.上海. _ in the regulations that you should not tell other people th
10、e password of your e-mail account.A. What is required B. What requires C. It is required D. It requires5 陕西 It never occurred to me _ you could succeed in persuading him to change his mind. A .which B what C .that D. if6. It is obvious to the students _ they should get well prepared for their future
11、.A. as B. which C. whether D. that7.上海. It has been proved _eating vegetables in childhood helps to protect you against serious illnesses in later life.A. if B. because C. when D. that8 It is not immediately clear _ the financial crisis will soon be over.A. since B. what C. when D. whether9.福建. It i
12、s none of your business _ other people think about you. Believe yourself.A. how B. what C. which D. when 10.湖南. _ is our belief that improvements in health care will lead to a stronger, more prosperous economy.A As B That C This D It11.浙江 It is uncertain _ side effect the medicine will bring about,
13、although about two thousand patients have taken it.A. that B. what C. how D. whether10. .福建. is known to us all is that the 2008 Olympic Games will take place in Beijing. A. It B. What C. As D. Which第二类：典型的主语从句1 北京. Barbara Jones offers to her fans is honesty and happiness.A. Which B. What C. That D
14、. Whom2 江西.The villagers have already known _ well do is to rebuild the bridge.A .this B .that C .what D .which3 北京. some people regard as a drawback is seen as a plus by many others.A Whether B What C That D How4.山东. _ was most important to her, she told me, was her family.A. It B. This C. What D. As5.上海 he referred to in his article was unknown to the general reader.A That B What C whether D that6.全二. _ matters most in
