人教版高中英语必修三unit4astronomythescienceofthestars全单元课件

人教版高中英语必修三unit4astronomythescienceofthestars全单元课件内容摘要：

en， 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. ： 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 certain that she will do well in her exam. It is true that I told her everything. It is 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 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, doesn’t matter, has turned out) that… It happens that they were absent. It seems that Alice is not ing to the party at all. It doesn’t matter whether she will e 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. have always been honest and straightforward, and it doesn‘t matter ______that I’m talking to. A. who is it B. who it is C. it is who D. it is whom 2. It is pretty well understood ___ controls the flow of carbon dioxide in and out the atmosphere today. A. that B. when C. what D. how 3. _____ made the school proud was______ more than 90％ of the students had been admitted to key universities. A. What。 because B. What。 that C. That。 what D. That。 because 4. ______ we will go camping tomorrow depends on the weather. A. If B. Whether C. That D. Where 5. _______ that they can pass the written exam this time. A. That is hoped B. It is hoped C. It hopes D. That hopes 6. It was doubtful ____ Mary really heard him. A. that B. if C. whether D. what Reading prehension: Put the following sentences into Chinese: 1. What it was to bee was a mystery until the dust began to slowly bine into a ball moving around the sun. 随后它会变成什么曾经是一个谜，直到最后这团尘埃开始慢慢地合成一个环绕太阳运转的球状物。 2. The problem was that the earth became violent because it was not clear whether the solid shape was to last or not. 问题是地球（开始）变得激烈动荡，不知道这个固体形状是否会继续存在下去。 3. It allowed the earth to dissolve harmful gases, which had bee part of the earth’s atmosphere, into the oceans and seas. 它使得地球得以把曾经存在于大气层中的有害气体，溶解在海洋里。 4. Whether life will continue on the earth for millions of years to e will depend on whether this problem can be solved. 在未来的千百万年中，生命能否在地球上延续将取决于这个问题能否得到解决。 Homework Review the subjective clause. Finish the exercise on the workbook. Language points Period 5 1. What it was to bee was a mystery until the dust began to slowly bine into a ball moving around the sun. 1. _________________ （使大家吃惊的是） is that he didn’t e to the meeting. What surprised everybody 2. ________________（他所做的） added to our difficulty. What he did _____ we can’t get seems better than ____ we have. A. What。 what B. What。 that C. That。 that D. That。 what _____ made the school proud was _____ more than 90% of the students had been admitted to key universities.。 because B. What。 that。 C. That。 what。 because A B problem was that the earth became violent because it was not clear whether the solid shape was to last or not. 问题是地球开始变得激烈动荡，不知道这个固体形状是否会继续下去。 n. 固体 solid, liquid, gas adj. 固体的；实心的 ,无空隙的；结实的，坚固的 solid fuels solid food a solid sphere solid furniture a man of solid build 1) Matter has three states: solid, liquid and gas. 2) When water freezes, it bees solid and we call it ice. be to (do): (something) will definitely happen, or it must happen 不可避免要发生或必须发生 said goodbye, little knowing that they were never to meet again. She is to be honoured for this great work. Mr. Clark said to his daughter, “You are to be home by 10 o’clock at the latest.” exploded loudly with fire and rock, which were in time to produce the water vapour, … 1). （ 使某物）炸开，爆炸 2). （指感情）激发 3). （指人口）突然或迅速增加 The firework exploded in his hand and he was hurt seriously.。