人教版高中英語必修三Unit4 Reading 重點短語和長難句分析課件 共21張PPT

1、 book3 unit 4 astronomy:the science of the stars(language points) 重點短語：重點短語：1. according to 按照，根據(jù)按照，根據(jù) 2. whetheror not 是否是否 3. in time 及時，終于及時，終于4. cool down 冷卻冷卻 5. be fundamental to 對對至關(guān)重要至關(guān)重要 6. dissolveinto 把把融入融入 7. a chain reaction 連鎖反應(yīng)連鎖反應(yīng) 8. lay eggs 下蛋下蛋 9. be different from 不同于不同于 10. giv

2、e birth to 產(chǎn)生，分娩產(chǎn)生，分娩 11. in ones turn 輪到某人；接著輪到某人；接著 12. look after 照顧，照看照顧，照看 13. preventfrom 阻止阻止14. escape from 逃脫逃脫 15. as a result of 作為作為的結(jié)果的結(jié)果16. depend on 依賴，依靠依賴，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引導(dǎo)的句子是引導(dǎo)的句子是_.as 翻譯為翻譯為_. 引導(dǎo)的句子是引導(dǎo)的句子是_.賓語從句賓語從句“因為因為, 由于由于”“原因狀語從句原因狀語從句”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引導(dǎo)的引導(dǎo)的_修飾修飾_“根據(jù)根據(jù)”定語從句定語從句“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引導(dǎo)的是引導(dǎo)的是_從句

9、從句, what在從句中作在從句中作become的的_。思考思考:when引導(dǎo)的是定語從句引導(dǎo)的是定語從句or時間狀語從句？時間狀語從句？ 主語從句中主語從句中was to become是是“be to do”結(jié)構(gòu)，結(jié)構(gòu)，在句中表示在句中表示_ 的動作。的動作。主語主語表語表語“不可避免不可避免將要發(fā)生將要發(fā)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 系系表表真正主語真正主語5. they were in time to produce carbon dixoide, nitrogen, water vapor and other gases，which were to make the earths atmosphere. in time及時及時, 終于終于eg. the doctor came just in time.拓展：拓展：all the time 一直一直, 始終始終 at the same time 同時同時from

11、 time to time 時不時地時不時地 in no time 立刻立刻, 馬上馬上which引導(dǎo)的是引導(dǎo)的是_非限制性定語從句非限制性定語從句6. what is even more important is that as the earth cooled down, water began to appear on its surface. what 引導(dǎo)的從句是引導(dǎo)的從句是_.在從句中在從句中作作_that 引導(dǎo)的從句是引導(dǎo)的從句是_,其中又有其中又有一個一個as 引導(dǎo)的引導(dǎo)的_.譯為譯為_主語從句主語從句表語從句表語從句時間狀語從句時間狀語從句 隨著隨著主語主語7. it was

12、 not immediately obvious that water was to be fundamental to the development of life.that 引導(dǎo)的引導(dǎo)的從句是從句是_,是真正的是真正的主語主語, it是是_。be fundamental to 意思是意思是_主語從句主語從句形式主語形式主語對對至關(guān)重要至關(guān)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引導(dǎo)的是引導(dǎo)的是_, what在從句中作在從句中作believe的的_.that引導(dǎo)的是引導(dǎo)的是_. dissolvedinto_主語從句主語從句賓語賓語表語從句表語從句把把融入融入9. this produced a chain reaction, which made it possible for life to develop.a chain reaction 連鎖反應(yīng)連鎖反應(yīng)which引導(dǎo)引導(dǎo)_,修飾先行修飾先行詞詞_make it + adj./n.(賓補賓補) (for sb. /sth.) to do sth.it 作

14、作_,真正的賓語真正的賓語_非限制性定語從句非限制性定語從句 a chain reaction 形式賓語形式賓語 動詞不定式動詞不定式 to 10. others, called amphibians, were able to live on land as well as in the water.此處此處called amphibians是是_, 修飾修飾_,相當于相當于定語從句定語從句_as well as:_which were called amphibians.過去分詞作后置定語過去分詞作后置定語也也; 和和一樣一樣others11. they produced young ge

15、nerally by laying eggs. lay- laid laid - laying 放置，產(chǎn)卵放置，產(chǎn)卵eg. he laid his books on the desk.注意注意: lay (laid; laid; laying) 放置放置; 產(chǎn)卵產(chǎn)卵 lie (lay; lain; lying) 躺躺; 位于位于 lie (lied; lied; lying) 說謊說謊 12. why they suddenly disappeared still remains a mystery.why 引導(dǎo)的是引導(dǎo)的是_,why在從句中在從句中作作_。remain 意思是意思是_, 是系

16、動詞。是系動詞。主語從句主語從句“保持著保持著”原因狀語原因狀語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.將將.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