1、必修3Noun clauses as the subjectUnit 4 GrammarTo learn the noun clauses as the subject语法讲解建议采用归纳法，如尽可能多的呈现一些相关例句，或可让学生从已学课文中找相应例句，引导学生试着从所观察到的语言现象中总结出语言规则和语法规律。a noun,noun phrase or pronoun representing the person or thing that performs the action of the verb,about which something is stated or,in a pa
2、ssive sentence,that is affected by the action of the verbI sat down.The house is very old.The tree was blown down in the storm.David arrived last night.Who is speaking,please?Two will be enough.Looking up all the new words in the dictionary took him a lot of time.To translate this ideal into reality
3、 needs hard work.How to do well is an important question.What has happened proves that our policy is right.Underline the subjects in the following sentences.n.pron.num.to dov-ingphrasesentencesubject clauseFind all the examples in the reading passage where noun clauses are used as the subject.()()()
4、()()()()主语从句的连接词有：that,whether,if,what,why,how等，it可以做形式主语。()()()()()()()主语从句后的谓语动词一般用单数形式。1._ it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.2.it was not clear _ the shape would last or not.3._ is even more important is that as the
5、 earth cooled down,water began to appear on its surface.4.It was not immediately obvious _water was to be fundamental to the development of life.WhatwhetherWhatthatgoReady?5._ many scientists believe is that the continued presence of water allowed the earth to dissolve harmful and acids into the oce
6、ans and seas.6._ they suddenly disappeared still remains a mystery.7.So _ life will continue on the earth for millions of years to come will depend on whether this problem can be solved.What Why whether以上我们已经通过归纳总结和练习对本课的语法内容有了一定的了解，下面就让我们根据之前练习的考察情况进一步选择讲解该语法项的重难点。主语从句 subject clause在复合句中，如作主语的是一个从
7、句，该从句被称为主语从句。That she was beautiful was plain to everyone.Whether hell come hasnt been decided.How a book will sell depends much on the reviewer(评论者).=It hasnt been decided whether hell come.形式主语真正主语连接词1.thatThat the earth moves around the sunis well known.2.whetherWhether he will come or not is not
8、known yet.3.whoWho will be sent there has not beendecided.4.whatWhat you need is more practice.5.whichWhich one is the best is not clear.6.when,whereWhen they will come hasnt been made public.Where he has gone is a question.7.why,howWhy there is gravity is hard to understand.How he can earn a living
9、 in Britainremains a big problem.8.whoever,whatever,whichever可引导主语从句。Whoever leaves the room last ought to turn off the lights.Whatever he did was right.Whichever of you comes in will receivea prize.注意：what 引导的从句作主语时，谓语动词的数由后面的表语或宾语决定。谓语动词的数主语从句后的谓语动词一般用单数形式。Who won the match is still unknown.What s
10、he lacks is experience.What we need are more books.1.that在主语从句中不充当任何成分，也无意义，只起连接作用，不能省略。Its uncertain whether/if hell come thisevening.连接词的选用2.whether和if的区别：whether与if 引导主语从句位于句中有时可换用。That he speaks English so well surprises all of us.Whether well go camping tomorrowdepends on the weather.Whether or
11、 not he will come stillremains a question.It makes no difference whether you will go today or tomorrow.在下列情况下用whether不用if：(1)主语从句位于句首时；(2)从句后有or或紧跟or not时。Why he didnt attend the meetingwasnt clear.When the plane will take off has not been announced.3.连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。常用句型有：
12、1.It+be+形容词+that从句It is/was+that clauseI.主语从句常用it作形式主语放句首,that引导的从句放在句末。it作形式主语certain clearimportantnecessaryprobablepossibleIt is certain that she will do well in her exam.可以肯定的是，她会在考试中做得很好。It is probable that he told me everything.他可能把一切都告诉我了。2.It+be+名词词组+that从句pity shameduty It is a pity that he
13、 missed such a good chance.It is/was a+that clause3.It+be+V-ed+that从句said reportedthoughthopedbelievedknown It is+that clauseIt is said that he is the best student in the class.It is thought that Joe drives badly.4.It+seem,happen,appear等不及物动词+that从句。It seems that Alice is not coming to the party at
14、all.It happened that I was out that day.It appears to me that you dont want to come to the party.Rewrite the following sentences with noun clauses as the subject.has not been proved is his discoverythe other astronomers accept his ideas remains a questionlife first appeared on earth is still a myste
15、ry to scientistsresearch the earth is becoming warmer is an important topic forthat Stephen Hawking at 65 experiencedzero gravity during a flightPluto is no longer considered a planet in our solar systemP29 2143526P29 3Read the following passage and complete it with the suitable clauses below.All of
16、 life is an act of letting go,but what hurts the most is not taking a moment to say goodbye.人生就是不断地放下，但最令人痛心的是，我们来不及好好告别。Line from the film Life of Pi 1.Whomever I chose will not only bring peace to the valley,but also to you.2.It is said that the Dragon Warrior can survive for months at a time on n
17、othing but the dew of a single Gingko leaf and the energy of the universe.相传“龙武士”单靠银杏甘露，和日月精华就可活好几个月。Lines from the film Kung Fu Panda 由连词that引导的主语从句中，that不作句子成分。在大多数情况下，可用it作形式主语，而把从句放在句末。Its rare that I find someone so non-patronizing.Line from the film Zootopia What pains us trains us.What doesnt
18、 kill us makes us stronger.What hurts us the most teaches us the best.使我们痛苦的东西在真正锻造我们。没有要我们命的事情让我们更强大。伤害我们最深的教会我们最多。Review主语从句在复合句中作句子的主语。引导主语从句的词有连词that,whether;连接代词who,what,which;连接副词when,where,how,why等。1.Exactly _ the potato was introduced into Europe is uncertain,but it was probably around 1565.
19、(2014大纲)2.I think _ impresses me about his painting is the colours he uses.(2014天津)3._ we understand things has a lot to do with what we feel.(2015北京)whenwhatHow用适当的连接词完成句子。4._ Li Bai,a great Chinese poet,was born is known to the public,but some wont accept it.(2015江苏)5.It is often the case _ anything is possible for those who hang on to hope.(2016江苏)6.Your support is important to our work,_ you can do helps.(2016北京)thatwhateverWhereRead the passage and choose the suitable clause for each blank.6273154Finish the exercises in Learning English.