高一英語（下）必修三Unit 4 課時教案Period 4

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1、 Period4. Grammar: Noun Clause used as the subject T: 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 ou

2、t 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

3、on … P64 USING STRUCTURE Do 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 ans

4、wer the questions? What’s his opinion? No. The answers have always well beyond our reach 3. 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 Crunc

5、h. 4.How can we have a complete picture of the universe? Learning to understand what we see. 做主語用的名詞性從句，因其在復(fù)合句中做主語，又稱主語從句，引導(dǎo)主語從句的有從屬連詞that, whether， 連接代詞who, what, which， 連接副詞when, where, how, why等。 1. 連接詞： 1）從屬連詞：that， whether等. that 引導(dǎo)主語從句只起引導(dǎo)作用，本身無實際意義，在主語從句中不充當任何成分，但不能省略。 That she left hi

6、m cut him to the heart. That he will come is certain. 由whether及其他連詞引導(dǎo)的主語從句放在句首，句后都可。 Whether it will please them is not easy to say. Whether she’s coming or not doesn’t matter too much. 2)連接代詞who ，what ，which, whatever, whichever, whoever What seems easy to some people seems difficult to

7、others. Which side will win is not clear. 3)連接副詞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： 主語從句可以前置，也可以后置。用it做形式主語，而把主語從句放在句末，常用下面幾種句型。 1）It + be + 表語 +主語從句 表語：（名詞， 形容詞，過去分詞） It i

8、s a pity that we can’t 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 reporte

9、d that China has sent another manmade earth satellite into orbit. 2）It+不及物動詞或短語+主語從句 It seemed (happened, doesn’t matter, has turned out) that… It happens that they were absent. It seems that Alice is not coming to the party at all. It doesn’t matter whether she will come or not. It makes no

10、difference where we shall have the meeting. 3) It +及物動詞（被動語態(tài)）+主語從句 It has been decided that the exhibition will not open on Sundays. 注意: 1） 主語從句在句首時，必須由連接詞引導(dǎo)，不能省略這些連接詞；但是如果用it做形式主語，而把主語從句放在句末時，從屬連詞that可以省略。 誤：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)如果主語從句放在句首，不能用if引導(dǎo)，但是如果用it 做形式主語，而把主語從句放在句末時，也可以用if引導(dǎo). 誤：If Mary really heard him is really doubtful. 正：It was doubtful if Mary really heard him. 單位：湖北省荊門　姓名：李國　E_mail：liguo619@