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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Answer keys for Ex.1 on Page 28:,Checking answer I (2m),word,Which used,trend,fuel,state,consume,glance,1,2,2,2,1,Answer keys for Ex.2 on Page 28:,Checking answer II (,3m),data, kept on,quantities, run out,build up, catastrophe,come about,consequence,phenomenon,graph,per,even if,resulted in,Discovering useful structures,Page 29,Answer key for exercise 1:,It was a scientist called Charles Keeling, who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to1997., it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.,强调句型,强调句型，你掌握了吗？,一、,It is/was+,被强调部分,+,that,+,剩余的部分,被强调部分是人,who/whom,/ that,+,剩余的部分,注意,(,被强调部分是,:,主语，宾语，表语或状语,),强调句的连接词一般只用,that,； 强调人时，可用,who,(,主语,),或,whom,(,宾语,).,强调句的时态一般为“,It was+that”,强调句的一般疑问句句型：,Is / Was +it +,所强调的部分,+that / who/ whom?,强调句的一般疑问句句型：疑问词,+,所强调的部分,+that / who/ whom?,1.,我是在街上遇见她的父亲的。,(,强调在街上,),2.,你是,8,点开始工作的吗？（强调时间,）,3.,正是因为她病了，他们才没见她做这项工作。,4.,他为什么不能回答这个问题？,It was,in the street,that,I met her father.,Was it,at eight oclock,that,you began to work?,Because she was ill,they didnt ask her to do the job.,It was,b,ecause she was ill,that they didnt ask her to do the job.,Why was it that,he couldnt answer the question.,（强调原因）,判断是否是强调句是，可把,It is / was that,去掉，剩余部分在不增减任何词的情况下还是一个完整的句子，那么这种句子是强调句。,It was,in the street,that,I met her father.,In the street,I met her father.,It was,because she was ill,that,they didnt ask her to do the job.,Because she was ill,they didnt ask her to do the job.,二、,not . until .,的强调形式,:,It is not until,+,被强调部分,+,that,. “,直到,才,”,，,主要用于强调时间状语的强调句型。,I,didnt,realize she was a famous film star,until,she,took off her dark glasses,.,Not until,she,took off her dark glasses,did,I,realize,she was a famous film star.,It was not until,she,took off her dark glasses,that,I realized she was a famous film,star.,三、,句子,谓语,的强调手段,：,do / does / did +,动词原形,e.g,我的确相信他是老实人。,I,do believe,that he is an honest man.,他们昨天的确去看过你，但没见到你。,They,did go to see,you yesterday, but,failed to,meet you.,四、,What +,从句,+ is / was,是名词从句结构，常用来强调主语、宾语。,e.g,他最希望的是成为一名飞行员。,（,强调宾语）,What he wishes most,is,to become a pilot,.,所叙述的是,现在或者将来,发生的事情,What,+,从句,is,所叙述的是,过去,发生的事情,What,+,从句,was,What interested me most,was,the beautiful,scenery,.,给予我们鼓励的是他为我们树立的榜样。,（,强调主语,）,What encouraged us,was,the example,he set for us,.,What +,从句,+ is / was,使我最感兴趣的是那美丽的风景。,（,强调主语,）,巩固练习：,1. It was what he said _disappointed me.,2. Is it in the factory _ this type of cars are produced?,3. Is it the factory _ this type of cars are produced ?,4. It is I _ is singing in the garden.,8. It is in the west of China _ there is no doubt _ it is going to rain tomorrow.,that,that,where,who,where,that,10. It was the training _ he had as a young man _ made him such a famous writer.,9. It was 1969 _ the American astronauts succeeded in landing on the moon.,when,that,when,It is scientists who warned that greenhouse gases would warm the earth by trapping heat energy in the atmosphere.,It is the greenhouse effect that gives the earths surface the average temperature of 15,It is fossil fuels that much of the energy used to light and heat our homes comes from.,It is the developed countries that consume the most energy in the world.,It is for centuries that carbon dioxide has the tendency to stay in the atmosphere while other greenhouse gases stay in the atmosphere only for a day or less.,Answer key for exercise,2 on page 29:,It is their very existence that low-lying countries feel is in danger from rising sea levels.,It is environmentalists who have tried to stop the earths temperature rising.,It is future climate changes and their effects on our environment that scientists want to find out about.,It is by several,metres,that the level of the sea could rise in the years ahead because of global warming.,It is outer space that might provide us with new energy sources in the future.,
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