人教新课标高中英语选修六Unit4 Grammar教案
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1、 人教选修 6 Unit4 Global Warming GrammarTeaching materialNSEFC Book 6 Unit 4Teaching aimsEnable the students to master the usage of the form it is/was. that. Teaching important pointsHow to enable the students to know the structure and the usage of the form it is/was. thatTeaching difficult pointsHow to
2、 help the students to master the usage of the form it is/was. thatTeaching aidstape recorder, slidesTeaching proceduresStep1 RevisionT: First lets check answers. (slide show)Discovering useful words and expressions. (P28)1. Charles Keeling collected _on the carbon dioxide content in the atmosphere o
3、ver a forty-year period. He found that the amount of carbon dioxide _ increasing during that time.2. Although we are burning coal in huge _ every year, we wont _ of it for centuries.3. If the amount of greenhouse gases continues to _ we could be facing a global _.4. Many scientists believe that glob
4、al warming has _ through the burning of fossil fuels. They do not think that ignoring the issue is worth the _.5. _ describes weather conditions over a period of years in a particular place.6. The _ of a rising sea level would be widespread flooding.7. The use of energy in Susannas country is low _
5、the use of energy in the USA.8. The warming of the earth is a _ that causes great concern.9. The _ shows temperature changes during the 20th century.10. One hectare of forest can absorb 23 tons of carbon dioxide _ year.Keys: 1.data kept on 2. quantities; run out 3. build up; catastrophe4. come about
6、; risk 5. Climate 6. consequence pared to 8.phenomenon9. graph 10. perAnswer keys for Ex.2 on Page 28:The first graph shows the global _ between _ and _The temperature _ and decreased over this period but on the whole it _ by around _ and its highest in 2000. There was a steady _ in the temperature
7、during the twenty years after 1980. We can see from the graph that the earth has become _ since early last century.The second graph shows the amount of _in the atmosphere from _ to _ .The carbon dioxide _ steadily over this forty-year period. It went up from 315 to 370 parts _million.Keys:Temperatur
8、e;1860;2000;increased;rose ;1910 ;increase/rise;warmercarbon dioxide;1957;1997;increase/ went up;perStep2 Grammar强调句结构常考的强调句结构是it 引导的句子。一、It is (was) 被强调部分+ that (who) + 句子其他部分。此结构强调的成分仅限于主语,宾语和状语。It is from the sun that we get light and heat.It was not until I had read your letter that I understood
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