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1、选修6 Unit 4Language points 11. 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。Language points 1 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：你认为谁将在这场比赛中获胜？ 误 Do you think who will win in the game?正 Who do you t
2、hink will win 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 he didnt come to school yesterday? 正 Do you know why he didnt come to school yesterday? 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”。指事情已经发生了，但不知道为什么，常用语疑问句或否定句中。Please tell me how the accident _.
3、I am still in the dark. (2005 江西)A. came by B. came outC. came to D. came about得到,从旁边走过出来， 露出 达到3. There is no 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 do
4、ubt 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 he doesnt like English.There is little doubt that he was the killer.There is some doubt whether he is a thief.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 researc
5、hers believe that there is no doubt _ a cure for AIDS will be found. (广东2005) A. which B. that C. what D. whether 点拨 根据固定搭配there is no doubt that .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2
6、007) 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 dont 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
7、 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)large amounts of money 大量的金钱 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
8、式表示出来，而是通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 you had not helped us), we could not have succeeded要是没有你的帮助,我们是不会成功的。 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
9、 Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 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 =
10、lead toThe accident resulted in three people being killed. 这一事故导致了三人死亡 。 The accident resulted in his death.8. On the other hand, there are those, like George Hambley, who are opposed to this view and 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
11、 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作句子的插入语，who引导的定 语从句修饰those,动词believe又带有以 that引导的宾语从句。on the other hand 另一方面on the one hand, on the other hand一方面 ，另一方面 I want to play basketball, but on the other hand, I have to study English
12、in the classroom. 我想打篮球，但另一方面，我不得不在教室里学习英语。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. build upSediment (沉淀物)builds up on the ocean floor. This built up my hope after the interview.累积, 收集 增加, 支持, 树立12.
13、even if /though: used to emphasize that, although something may happen or may be true, it will not change a situation即使，甚至I wouldnt let it out to you even if you were my friend. Even if she survives, shell never fully recover. Even though hes 30 now, hes still like a little child.I. 根据下列各句句意及所给单词的首字
14、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. 3. She studied hard, and in c_ she passed the exam. 4. The park attracts 4 million visitors p_ year.quantityrangeconsequenceper5. What sort of _ (燃料) do these machines need? 6. The _ (数据) i
15、s still being analysed. So dont be so worried. 7. The earthquake was a terrible _ (大灾难). 8. A rainbow is a natural _ (现 象) especially after a heavy rain. 10. The _ (曲线图) of export indicates a new success of the company.graphfueldata catastrophe ktstrf phenomenonII. 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 _ could keep up for another several days! 2. come about; come across a. I
