2018-2019人教新目标高中英语选修六课件:unit 4 learning about language
25页1、Unit 4 Global warming Learning about Language,Learning aims,1. Check up the answers of the exercises on P28. 2. Learn the use of “it” “it” is used for emphasis in a sentence.,( )1.Look at the picture. It is a picture of our school. ( )2.Its half past eight now. ( )3.Its only half an hours walk from here to our school. ( )4.It rains heavily. ( )5.It is quiet here. ( )6.It is possible that we will win. ( )7.I think it easy to put on weight.,Review the use of “it” Match the function of “it” with th
2、e right sentence:,C,A,D,E,B,F,G,Leading-in,A.代指时间 B.代指环境 C.代指物件 D.代指距离 E.代指天气 F.形式主语 G.形式宾语,Translate the following sentences into Chinese.,It is human activity that has caused this global warming.,Human activity has caused this global warming.,人类活动导致了全球气候变暖。,正是人类的活动导致了全球气候变暖。,Observe the sentences above ,and think about the function of “it” here?,“It” is used for emphasis(强调) here.,In the article there are two more similar sentences.,1. It was a scientist called Charles Keeling ,who made accura
3、te measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997.,2.They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide.,一、It的基本用法 1. 代词 (1)用作人称代词, 代替前文提到的事物。 My watch is missing. I cant find (it) anywhere Her father has gone abroad. Have you heard about (it)? (2)代替指示代词this, that。 Whats this? (Its) a computer Whose pen is that? (Its) mine,Grammar,(3)表示时间、天气、距离、季节、度量等。 Its time for lunch. Its getting warmer a
4、nd warmer Its forty years since my hometown was liberated Its summer now How far is it from here to the airport? Its about twenty minutes walk from here to the bus stop,2. 引导词 (1)作形式主语, 代替由不定式, 动名词或从句表示的真正主语。其基本句型为: It (形式主语) +adj. + to+ v. It (形式主语) +adj. + that (subject (主语)+v. ) It (形式主语)+adj.+ whether (subject +v.) It is adj.for (of ) sb. to do sth. Itseems (appears)that (subject v.) happens, Is _ possible to master a foreign language in two months? 在两个月内掌握一门外语可能吗?, It is very important to h
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