Unit4GlobalwarmingLanguagepoints1课件（人教版选修6）.ppt

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 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 we cant cut down the big tree? [正] Do you know why we cant cut down the big tree?;2. compare;3.How has this come about and does it matter? come about : 发生，造成 相当于happen eg:你能告诉我事情是怎么发生的吗？ eg:随着电的使用，种种大变化发生了。;4. 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。 ;eg: Theres no doubt that one day a cure will be found. There is little doubt that he was the killer.;5. …it is human activity that has caused this global warming rather than a random but natural phenomenon.;rather than 而不是…… She is a career woman rather than a housewife. 她是职业妇女而不是家庭主妇。 rather than 在更大程度上 These are political rather than social matters. 与其说这些是社会问题，不如说是 政治问题。;6. phenomenon n. 现象； 奇迹，罕见的人才或事物 eg: 雨雪是天气现象。 Rain and snow are phenomena of the weather. eg:不应该简单地视未婚妈妈为一种社会现象。 Unmarried mothers should not be regarded simply_____________________. eg:贝多芬是音乐家中的天才。 Beethoven was________________ among musicians.;Harry’s rapid success made him an extraordinary person in the business would. = Harry was made ______ _______ because of his rapid success in the business world.;7. 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 ; 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。;8．Without 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，而是通过一个