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Period4. Grammar: Noun Clause used as the subjectT: Can you find the following sentence in the reading passage?What it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun.In this sentence a noun clause is used as the subject.Please pick out three more sentences with subject clauses from the reading passage.1. because it was not clear whether the solid shape was to last or not.2. What scientists think is that the earth was different because of 3. Whether life will continue on the earth for millions of years to come will depend on P64 USING STRUCTUREDo you know where we come from? How did the universe begin? Read the passage and try to understand how Stephen Hawking solved the problems?1. What has attracted Stephen Hawking all his life?What the universe is like has attracted him.2. Does he think it simple to answer the questions? Whats his opinion?No. The answers have always well beyond our reach3. What have we discovered about the universe, past and present?Milky Way galaxy; billions of galaxies, in a universe that is infinite and expanding; big bang; black hole; a dark matter; a possible Big Crunch.4.How can we have a complete picture of the universe?Learning to understand what we see.做主语用的名词性从句，因其在复合句中做主语，又称主语从句，引导主语从句的有从属连词that, whether， 连接代词who, what, which， 连接副词when, where, how, why等。1. 连接词：1）从属连词：that， whether等.that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。That she left him cut him to the heart.That he will come is certain.由whether及其他连词引导的主语从句放在句首，句后都可。 Whether it will please them is not easy to say.Whether shes coming or not doesnt matter too much.2)连接代词who ，what ，which, whatever, whichever, whoever What seems easy to some people seems difficult to others.Which side will win is not clear.3)连接副词when，where， how， why等。Why he did it remains a mystery.When they will start is not known yet.How he became a great scientist is known to us all.2.位置： 主语从句可以前置，也可以后置。用it做形式主语，而把主语从句放在句末，常用下面几种句型。1）It + be + 表语 +主语从句表语：（名词， 形容词，过去分词）It is a pity that we cant go.It is no surprise that our team should have won the game.It is an honour that I was invited to attend the meeting.It is certain that she will do well in her exam.It is true that I told her everything.It is said that Mr. Green has arrived in Beijing.It is reported that China has sent another manmade earth satellite into orbit.2）It+不及物动词或短语+主语从句It seemed (happened, doesnt matter, has turned out) that It happens that they were absent.It seems that Alice is not coming to the party at all.It doesnt matter whether she will come or not.It makes no difference where we shall have the meeting.3) It +及物动词（被动语态）+主语从句It has been decided that the exhibition will not open on Sundays.注意:1） 主语从句在句首时，必须由连接词引导，不能省略这些连接词；但是如果用it做形式主语，而把主语从句放在句末时，从属连词that可以省略。误：They should like each other is natural.正：That they should like each other is natural.正：It is natural that they should like each other.2)如果主语从句放在句首，不能用if引导，但是如果用it 做形式主语，而把主语从句放在句末时，也可以用if引导.误：If Mary really heard him is really doubtful.正：It was doubtful if Mary really heard him.单位：湖北省荆门姓名：李国E_mail：liguo619
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