人教版高中英语必修三Unit4 Reading 重点短语和长难句分析课件 共21张PPT

1、 book3 unit 4 astronomy:the science of the stars(language points) 重点短语：重点短语：1. according to 按照，根据按照，根据 2. whetheror not 是否是否 3. in time 及时，终于及时，终于4. cool down 冷却冷却 5. be fundamental to 对对至关重要至关重要 6. dissolveinto 把把融入融入 7. a chain reaction 连锁反应连锁反应 8. lay eggs 下蛋下蛋 9. be different from 不同于不同于 10. giv

2、e birth to 产生，分娩产生，分娩 11. in ones turn 轮到某人；接着轮到某人；接着 12. look after 照顾，照看照顾，照看 13. preventfrom 阻止阻止14. escape from 逃脱逃脱 15. as a result of 作为作为的结果的结果16. depend on 依赖，依靠依赖，依靠 self-study:1. no one knows exactly how the earth began, as it happened so long ago.2. however, according to a widely accepted

3、 theory, the universe began with a “big bang” that threw matter in all directions.3. what it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 4. the earth became so violent that it was not clear whether the shape would last or not.5. t

4、hey were in time to produce carbon dioxide, nitrogen, water vapor and other gases, which were to make the earths atmosphere.6. what is even more important is that as the earth cooled down, water began to appear on its surface.7. it was not immediately obvious that water was to be fundamental to the

5、development of life. 8.what many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.9.this produced a chain reaction, which made it possible for life to develop.10. others, called amphibians, were able to live on

6、land as well as in the water.11. they produced young generally by laying eggs.12. why they suddenly disappeared still remains a mystery.13. they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. 14. so whether life will continue on

7、the earth for millions of years to come will depend on whether this problem can be solved. 1. no one knows exactly how the earth began, as it happened so long ago.how引导的句子是引导的句子是_.as 翻译为翻译为_. 引导的句子是引导的句子是_.宾语从句宾语从句“因为因为, 由于由于”“原因状语从句原因状语从句”2. however, according to a widely accepted theory, the unive

8、rse began with a “big bang” that threw matter in all directions.according to意思是意思是_that threw matter in all directions是是that引导的引导的_修饰修饰_“根据根据”定语从句定语从句“big bang”3. what it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. what引导的是引导的是_从句

9、从句, what在从句中作在从句中作become的的_。思考思考:when引导的是定语从句引导的是定语从句or时间状语从句？时间状语从句？ 主语从句中主语从句中was to become是是“be to do”结构，结构，在句中表示在句中表示_ 的动作。的动作。主语主语表语表语“不可避免不可避免将要发生将要发生”4. the earth became so violent that it was not clear whether the shape would last or not.sothat如此如此以至于以至于it is/was not clear whether不清楚是否不清楚是否i

10、t was not clear whether the shape would last or not.主主 系系表表真正主语真正主语5. they were in time to produce carbon dixoide, nitrogen, water vapor and other gases，which were to make the earths atmosphere. in time及时及时, 终于终于eg. the doctor came just in time.拓展：拓展：all the time 一直一直, 始终始终 at the same time 同时同时from

11、 time to time 时不时地时不时地 in no time 立刻立刻, 马上马上which引导的是引导的是_非限制性定语从句非限制性定语从句6. what is even more important is that as the earth cooled down, water began to appear on its surface. what 引导的从句是引导的从句是_.在从句中在从句中作作_that 引导的从句是引导的从句是_,其中又有其中又有一个一个as 引导的引导的_.译为译为_主语从句主语从句表语从句表语从句时间状语从句时间状语从句 随着随着主语主语7. it was

12、 not immediately obvious that water was to be fundamental to the development of life.that 引导的引导的从句是从句是_,是真正的是真正的主语主语, it是是_。be fundamental to 意思是意思是_主语从句主语从句形式主语形式主语对对至关重要至关重要8. what many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids

13、 into the oceans and seas.what引导的是引导的是_, what在从句中作在从句中作believe的的_.that引导的是引导的是_. dissolvedinto_主语从句主语从句宾语宾语表语从句表语从句把把融入融入9. this produced a chain reaction, which made it possible for life to develop.a chain reaction 连锁反应连锁反应which引导引导_,修饰先行修饰先行词词_make it + adj./n.(宾补宾补) (for sb. /sth.) to do sth.it 作

14、作_,真正的宾语真正的宾语_非限制性定语从句非限制性定语从句 a chain reaction 形式宾语形式宾语 动词不定式动词不定式 to 10. others, called amphibians, were able to live on land as well as in the water.此处此处called amphibians是是_, 修饰修饰_,相当于相当于定语从句定语从句_as well as:_which were called amphibians.过去分词作后置定语过去分词作后置定语也也; 和和一样一样others11. they produced young ge

15、nerally by laying eggs. lay- laid laid - laying 放置，产卵放置，产卵eg. he laid his books on the desk.注意注意: lay (laid; laid; laying) 放置放置; 产卵产卵 lie (lay; lain; lying) 躺躺; 位于位于 lie (lied; lied; lying) 说谎说谎 12. why they suddenly disappeared still remains a mystery.why 引导的是引导的是_,why在从句中在从句中作作_。remain 意思是意思是_, 是系

16、动词。是系动词。主语从句主语从句“保持着保持着”原因状语原因状语13. they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. prevent . from: _拓展拓展: prevent(from) keepfrom 阻止阻止做某事做某事 stop(from)o.将将.注入，使融入注入，使融入阻止某人做某事阻止某人做某事14. so whether life will continue on the earth for millions of years to come will depend on wheth