高中英语 Unit 4 Astronomy the science of the stars Language points导学案（教师版）新人教版必修3

1、陕西省西安交大阳光中学高中英语 Unit 4 Astronomy the science of the stars Language points导学案（教师版）新人教版必修3第 课时课题名称时间第 周 星期课型Language points主备课人目标Knowledge aims: Learn useful words and expressions Ability aims: Use the useful words and expressions correctly.重点Master the usage of the key words and expressions.二次备课难点Mas

2、ter the sentence patterns: This produced a chain reaction, which made it possible for life to develop自主学习在课文中找出下列句子1. 没有人确切地知道地球是怎样开始的，因为它发生在很久以前。2. 地球变得如此动荡激烈以至于不知道这个固体形状是否会继续存在下去。3. 更重要的是当地球冷却下来，水就出现在其表面。4. 这就产生了一个连锁反应，是生命的发展成为可能。问题生成记录： 精讲互动1.Because the atmosphere can hold some heat from the sun

3、, otherwise the earth would be too cold to live on at night. atmosphere词性：_ 词义：_There is always a friendly atmosphere in my family when we get together. atmosphere词性：_ 词义：_2.Water had also appeared on other planets like Mars, but unlike the earth, it had disappeared later. 【归纳】unlike词性：_ 词义：_They ar

4、e both teachers. Apart from this, they are quite unlike.【归纳】unlike词性：_ 词义：_3.It is harmful to your eyes to read in the sun.【归纳】be harmful to=do harm to 【拓展】I mean no harm.翻译: We will not do anything that harm the cause of peace.翻译： 1. Dont be silly, such a thing does not exist.【归纳】exist词性：_ 词义：_【用法】

5、Fish can not exist without water.【拓展】existence n. 词义：_ come into existence,产生，开始存在 in existence,现存的5.How the earth came into being is still a puzzle to us. puzzle词性：_ 词义：_What puzzles me most is why some students are so silent in class. puzzle词性：_ 词义：_【拓展】 puzzling 词义：_ puzzled词义：_ 6.in time【用法】The

6、police came in time, so the accident was stopped. 【用法】You will succeed in time if you keep on working hard.【归纳】in time 词义_ 7.Because they gave birth to young baby animals and produced milk to feed them.【归纳】give birth to词义_【用法】This accident gave birth to the beginning of the war.【归纳】give birth to词义_8. in ones turn词义_ Thus they have, in their turn, become the most important animals on the planet.in turn, 词义_take turns to do sth 词义_by turns 词义_Its ones turn to do sth 词义_9.preventfrom 【例句】, which prevents heat from escaping from the into space. preventfrom 词义 【拓展】写出其同义短语 1