新人教选修六Unit4Globalwarming-Languagepoints[课件].ppt

1、人教课标版 高二选修6 Unit 4,英 语 课 件,Language points,1. What do you think green house gases do? 你认为温室气体有什么作用呢? 本句中think后接了一个由what引导的宾语从句。,但应注意的是：特殊宾语从句即当一般疑问句主句的谓语动词是think, believe，suppose，consider, imagine，guess和suggest等时，表疑问的词要放在主句前即句首。,例如： 正 Who do you think will win in the game? 误 Do you think who will wi

2、n in the game?,当然一般情况下宾语从句的疑问词应放在主句之后，例如： 误 Why do you know we cant cut down the big tree? 正 Do you know why we cant cut down the big tree?,2. So how has this come about and does it matter?,考点 come about是不及物短语，意为“发生”。 Please tell me how the accident _. I am still in the dark. (2005 江西) A. came by B.

3、 came out C. came to D. came about,得到，获得,出来， 露出,达到,Its already 10 oclock. I wonder how it _ that she was two hours late on such a short trip. (湖北2006) A. came over B. came out C. came about D. came up 点拨 根据句意“已经十点钟了。我不知道是怎么回事，这么短的路程她迟到了两个小时。”选C。come over来访；come out出来，出版；come up出现，到来。,3. There is no

4、doubt that the earth is becoming warmer and that it is human activity that has caused this global warming rather than a random but natural phenomenon. There is no doubt that. There is some doubt whether. 辨析：主句为肯定句时，doubt后使用连词whether。主句为否定句时，doubt后则使用连词that。,e.g.: Theres no doubt that one day a cure

5、will be found. There is little doubt that he was the killer.,考点1 There is no doubt that .是固定句型，意为“毫无疑问”，that引导的是同位语从句，用来进一步补充说明doubt的具体内容。 考例 Some researchers believe that there is no doubt _ a cure for AIDS will be found. (广东2005) A. which B. thatC. what D. whether 点拨 根据固定搭配there is no doubt that .

6、可知选B。,考点2 it is . that .在此句中构成强调句型，强调的是主语human activity。强调句型除谓语不能强调外，可强调主语、宾语或状语。 考例1 It is not who is right but what is right _ is of importance. (重庆2007) A. which B. itC. that D. this 点拨 根据强调句型的判断方法：将it is和that去掉后，此句成为Not who is right but what is right is of importance，是一个完整的句子，故此题是一个强调句型。,考例2 I d

7、ont mind her criticizing me, but _ is how she does it that I object to. (江西2007) A. itB. thatC. this D. which 点拨 去掉it is和that后，本句相当于., but I object to how she does it，是个完整的句子。故此句是it强调句型，被强调部分是宾语从句。,4. amount of 习惯用语： an amount of 相当数量的; 一些 any amount (of) 任何数量(的); 大量(的) be of little amount 不重要; 无价值,

8、n. 数量 large amounts of money 大量的金钱 In an invoice the amount of money should be written both in words and in figures. 发票上的钱数要用字和数码写出来。,5Without the green house effect, the earth would be about thirty-three degrees Celsius cooler than it is. 如果没有温室效应，地球会比现在冷33。 这是一个含蓄虚拟条件句,应该注意有时假设的情况并不以条件从句形式表示出来，而是通

9、过一个介词短语或其他方式表示。常用的词或短语有：without, but for, but that, otherwise, or, but等。,例如： Without your help ( = If we had not had your help), we could not have succeeded 要是没有你的帮助，我们是不会成功的。,But for electricity (= If there were no electricity), there would be no modem industry 要是没有电，就不会有现代工业。,He was having a meeti

10、ng with his students; otherwise he would have come. 他当时正与他的学生进行讨论，否则的话他就来帮我们了。,He felt very tired yesterday, or he would have attended the party 他昨天很累, 不然他就参加那个聚会了。,6. It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957

11、 to 1997. 翻译 是一位名叫查尔斯奎林的科学家把1957至1997年期间大气层中二氧化碳的含量作了精确的统计。 点拨 该句是一个it was . who强调句。a scientist called Charles Keeling是被强调部分，其中called Charles Keeling为过去分词短语作后置定语，修饰a scientist。,7. result in 导致, 造成 =lead to,The accident resulted in three people being killed. 这一事故导致他的死亡。,The accident resulted in his d

12、eath.,8. On the other hand, there are those, like George Hambley, who are opposed to this view, believe that we should not worry about high levels of carbon dioxide in the air. 翻译 在另一方面, 还有一些人，对这一观点持反对态度，像科学家乔治汉布利，他们认为我们不必担心空气中高含量的二氧化碳。,点拨 该句是一个主从复合句。主句为there are those，like scientist George Hambley作

13、句子的插入语，who引导的定语从句修饰those，且在该定语从句中其谓语动词believe又带有that引导的宾语从句。句子的主要部分可以表示为: . there are those who believe that .,on the other hand: used to give another opinion or fact that should be considered as well as the one you have just given 另一方面 also on the one hand. . on the other hand,Id like to eat out, b

14、ut on the other hand I should be trying to save money. I want to go to the party, but on the other hand I ought to be studying. 我想去参加聚会，但从另一方面来说，我应该留下来学习。,9. consequence,in consequence 因此 as a consequence 结果 as a consequence of 由于的结果,10. range,in /within range 在射程之内 out of / beyond range 在射程之外,11. b

15、uild up,Build up the business Sediment (沉淀物)builds up on the ocean floor. This built up my hope after the interview.,develop 扩大, 发展,collect 累积, 收集,增加, 支持, 树立,12. even if /though: used to emphasize that, although something may happen or may be true, it will not change a situation I wouldnt tell you e

16、ven if I knew.,Even if she survives, shell never fully recover. Even though hes 24 now, hes still like a little child. I can still remember, even though it was so long ago.,I. 根据下列各句句意及所给单词的首字母或汉语提示，写出各单词的正确形式。 1. A large q_ of rice is badly needed here. 2. Students are from a wide r_ of backgrounds

17、. 3. She studied hard, and in c_ she passed the exam. 4. The park attracts 4 million visitors p_ year.,quantity,range,consequence,per,练习,5. What sort of _ (燃料) do these machines need? 6. The _ (数据) is still being analysed. So dont be so worried. 7. The earthquake was a terrible _ (大灾难). 8. A rainbow

18、 is a natural _ (现象) especially after a heavy rain. 10. The _ (曲线图) of export indicates a new success of the company.,graph,fuel,data,catastrophe,phenomenon,II. 根据句意, 选择适当的单词或短语填空 1. climate; weather a. Its very difficult for her to get used to the dry and cold _ there. b. How we wish the sunny _ co

19、uld keep up for another several days! 2. come about; come across a. Ive never _ anyone quite like her before. b. Please tell me how the accident _. I am still in the dark.,climate,weather,come across,came about,3. quantity; quality a. Much of the land was of poor _. b. Buy vegetables in small _, for

20、 your immediate use. 4. result in; result from a. The accident _ the death of three people. b. His failure _ not working hard enough.,quality,quantities,resulted in,resulted from,5. glance; glare; stare a. He _ angrily at her across the dinner table. b. She _ at the page for several minutes, trying

21、to understand. c. She _ round the room before she left.,glared,stared,glanced,III. 每空一词, 使两个句子的意思相同。 1. It was very late, but they went on working. It was very late, but they _ _ working. 2. We dont doubt that he can do a good job. _ _ _ _ _ he can do a good job. 3. Their carelessness led to the failure. Their carelessness _ _ the failure.,kept on,There is no doubt that,resulted in,4. I dont know how the accident happened. I dont know how the accident _ _. 5. The factory turns out a large number of paper products. The factory turns out _ _ _ _ paper products. 6. Alth