年人教版必修3导学案：unit 4 language points教师版.doc

2020年精编人教版英语资料第 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Master 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, 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 are 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. Don’t be silly, such a thing does not exist.【归纳】exist词性：_____________ 词义：___________________【用法】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 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 one’s 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_____________It’s one’s turn to do sth 词义_____________9.prevent…from 【例句】…, which prevents heat from escaping from the into space. prevent…from 词义 【拓展】写出其同义短语 10…make it possible for life to developmake it (形式宾语)for sb to do sth(真正的宾语)翻译：高科技使人类登上火星成为可能。

达标训练单项填空作业反思板书设计。