1、Unit 4 Astronomy:the science of the starsPeriod 3 Period 3 Subject ClauseSubject ClauseGrammar3.To find your way can be a problem.2.Smoking is bad for you.1.You are a student.4.“How do you do?”is a greeting.5.What she said is not yet known.6.That we shall be late is certain.7.It is certain that we s
2、hall be late.Subject（主语）A sentence serving as subject is called Subject Clause.一主语从句的连接词1.that 1.that 只起引导作用，本身无实际意义，不充只起引导作用，本身无实际意义，不充当任何成分，但当任何成分，但不能省略不能省略。ThatThat she left him she left him made him heart-broken.made him heart-broken.ThatThat he is still alive he is still alive is a good news to
3、 us.is a good news to us.我们保持平衡饮食有益健康。我们保持平衡饮食有益健康。2.2.置于句首只能用置于句首只能用whether“whether“是否是否”，不充当从句，不充当从句的任何成分。的任何成分。他是否会参加这个话剧表演是显而易见的他是否会参加这个话剧表演是显而易见的_ is clear._ is clear._(_(他能否买到飞机票他能否买到飞机票)doesnt matter much.doesnt matter much.Whether he can buy the plane ticketsWhether he can buy the plane tick
4、etsWhether hell take part in the playWhether hell take part in the playThat we keep a balanced diet is good for our health.we keep a balanced diet is good for our health.3 3 whwh-疑问词包含意思，并在从句中充当成分。疑问词包含意思，并在从句中充当成分。_ she will be back is still a question._ she will be back is still a question._ you t
5、old me just now was really a surprise._ you told me just now was really a surprise._ we will hold the basketball game tomorrow is _ we will hold the basketball game tomorrow is not important.not important._ class will win the football game is not clear._ class will win the football game is not clear
6、._ will meet him is not decided._ will meet him is not decided.WhenWhenWhatWhatWhereWhereWhich Which WhoWho_ breaks the law should be punished._ breaks the law should be punished._ has helped to save the drowning girl is worth_ has helped to save the drowning girl is worthpraising.praising._ tells l
7、ies is wrong_ tells lies is wrongWhoeverWhoeverWhoeverWhoeverWhoeverWhoever1._ will win the gold medal remains to be seen.2._ wants to ask questions is welcome any time.3.The manager decided to offer the job to _ he believed had a strong sense of duty.WhoWhoWhoeverwhoeverwhoeverWho/whoever/whomever4
8、._ you choose as your wife has nothing to do with me.5._ breaks the law should be punished.6.There is no doubt that anyone _ doesnt give in to difficulties will be successful at last.WhomeverWhomeverWhoeverWhoeverwhowho1)_ you said yesterday is right.1)_ you said yesterday is right.2)_ she is still
9、alive is a consolation2)_ she is still alive is a consolation（安慰）（安慰）.3)_ he lost the bike worried him a lot.3)_ he lost the bike worried him a lot.4)_ 4)_ caused caused the the accident accident remains remains unknown.unknown.5)_ made matters worse was_ night began to fall.5)_ made matters worse w
10、as_ night began to fall.6)_ we cant get seems better than _ we have.6)_ we cant get seems better than _ we have.WhatWhatThatThatThatThat注：what 与 that在引导主语从句时的区别what what 在从句中充当句子成分，如主语、宾语、表在从句中充当句子成分，如主语、宾语、表语，而语，而that that 则不然。则不然。WhatWhatWhat thatWhat thatWhat What whatwhat二二.it 做形式主语做形式主语为了防止句子头重
11、脚轻，通常把形式主语为了防止句子头重脚轻，通常把形式主语itit放在主语放在主语位置，真正主语搁置于句末。位置，真正主语搁置于句末。1）It+be+名词/形容词+主语从句ExxExx:很肯定他会赢得比赛的。很肯定他会赢得比赛的。_ that he will win the match._ that he will win the match.It is a fact that _(It is a fact that _(地球绕着太阳转地球绕着太阳转)ItIt is very likely is very likely thatthat they will hold a meeting.they
12、 will hold a meeting.It It is important is important thatthat we all should attend the meeting.we all should attend the meeting.ItIt is still a mystery is still a mystery whatwhat caused the accident.caused the accident.It is certainIt is certainthe earth goesthe earth goesaround the sunaround the s
13、un2）It+不及物动词(seem,happen,matter)+主语从句It It seems seems thatthat he has seen the film.he has seen the film.似乎似乎It It happened happened that that they were absent.they were absent.碰巧碰巧3）It过去分词从句ItIt is said is said thatthat President President ObamaObama will visit our school will visit our school nex
14、t week.next week.据说据说 It is decided that It is decided that 据决定据决定It is believed that It is believed that 据认为据认为ItIt is known to all is known to all thatthat Li Li HuaHua is the best student in our is the best student in our class.class.众所周知众所周知1.This is natural that they should like each other.2.It
15、 is true he has made a very important discovery in chemistry.3.It doesnt matter that he is wrong or not.4.It is know to all that Lu Xun is a famous author.True or False It that whether knownWhatever he says Whatever he says isis of no importance.of no importance.Whoever says this Whoever says this i
16、sis wrong wrong但谓语动词用单数还是复数，不可一概而论，而要但谓语动词用单数还是复数，不可一概而论，而要视句子的意义而定视句子的意义而定What I need What I need isis money.money.What I need What I need areare books.books.三三.在主语从句中，谓语一般用单数单数。When and where well hold the meeting _When and where well hold the meeting _not been decided yet.not been decided yet.A.h
17、as B.is C.have D.areA.has B.is C.have D.areBlanks filling1.Who we should invite to open the conference is a question.2.Whether it should last two days or three days doesnt matter.3.Whoever wants the book may have it.4.How many people will attend the conference has not been decided.5.Which team will
18、win the football match is still unknown.6.It is uncertain when we should hold the conference,in May or June.7.Why so many people are interested in basketball is what we want to know.8.That there is life on another planet is almost impossible.9.It is still unknown who will be sent to the States.10.Wh
19、at make my life colorful in the school are my good friends and kind teachers.whether/that/who/which/when/why/what/how/whoeverRewrite the following sentences with noun clauses as the subject.P29 Ex2 His discovery has not yet been proved.Do the other astronomers accept his ideas?It remains a question.
20、The first appearance of life on earth is still a mystery to scientist.What has not yet been proved is his discovery.Whether other astronomers accepts his ideas remains a question.How life first appeared on earth is still a mystery to scientists.Why is the earth becoming warmer?It is an important top
21、ic for research.Stephen Hawking at 65 experienced zero gravity during a flight.It amazed everybody.Pluto is no longer considered a planet in our solar system.What a surprise!Why the earth is becoming warmer is an important topic for research.It amazed everybody that Stephen Hawking at 65 experienced
22、 zero gravity during a flight.It is a surprise that Pluto is no longer considered a planet in our solar system.1.What it was to become was uncertain1.What it was to become was uncertain2.it was not clear whether the shape would last or not.2.it was not clear whether the shape would last or not.3.Wha
23、t is even more important is that as the earth3.What is even more important is that as the earthcooled down,water began to appear on its surface.cooled down,water began to appear on its surface.4.It was not immediately obvious that water was to4.It was not immediately obvious that water was tobe fund
24、amental to the development of life.be fundamental to the development of life.5.What many scientists believe is that5.What many scientists believe is that6.Why they suddenly disappeared still remains 6.Why they suddenly disappeared still remains amysteryamystery.7.Whether life will continue on the ea
25、rth will depend on7.Whether life will continue on the earth will depend onFind the subject clauses in the text and translate them.P25-26A survey on school lifeExample:A-What cant you get used to?B-Getting up very early in the morning.Report:What he cant get used to is getting up early in the morning.1.What are you good at?Report:_2.What are you very proud of?Report:_3.What are you deeply interested in?Report:_4.What are you now fed up with?Report:_5.What makes you easily get annoyed about?Report:_
