2018-2019人教新目标高中英语选修六课件：unit 4 learning about language

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 the 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 accurate 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 and 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 help each other 相互帮助非常重要。 It is no use / useless going there again 再去那里是没有用的。,it,(2)作形式宾语, 代替由不定式、动名词或从句表示的 真正宾语。其基本句型为: 主语谓语it (形式宾语)宾语补足语to do sth. (doing sth. 或that从句). Marx found it important to study the situation in Russia She thought it no use writing to him again. Do you think _ difficult to work out this maths problem? （it/that),it,二、it用于强调句 用在强调句型中, 为了强调句子的某一成分(通常是主语、宾语或状语), 常用结构: It is / was 被强调部分that (who) . 注意： 此结构强调的成分仅限于主语、宾语和状语。,例如： 原句：My father did the experiment in the lab yesterday evening 强调主语： It was my father who/that did the experiment in the lab yesterday evening 强调宾语： It was the experiment that my father did in the lab yesterday evening,强调时间： （2017天津高考）It was when I got back to my apartment that I first came across my new neighbors. 强调地点： It was in the lab that my father did the experiment yesterday evening,(1) It was last night _ I saw the film Star Wars (2) It is ten years _ Miss Green returned to Canada,【即学即练】选词填空 (that/who/since)。,that,since,强调句型的一般疑问句形式为: Is/Was it. that/who.? 强调句型的特殊疑问句形式为: 特殊疑问词+ is/was+that. not.until 结构的强调句型为： It is/was not until .that. 注意：否定词not要转移到until前面。that后应用肯定形式。 Is it professor Wang that/who teaches English? When is it that you will set off? It was not until 10 oclock that he went to bed.,1.（2016天津高考）You are waiting at a wrong place. _the coach picks up tourists. 你等错地方了。长途客车是在宾馆接游客。 2. (2017·6月天津高考) _ I got back to my apartment _ I first came across my new neighbors. 在我回到公寓时, 我第一次遇见了我的新邻居。,【高考链接】完成下列强调句。,It is at the hotel that,It was when,that,3. (2018·天津高考) It was only when the car pulled up in front of our house _ we saw Lily in the passenger seat. 当车停在了我们房前时我们才看到莉莉坐在乘客座上。,that,每空填一词, 使该句与所给句子的意思相同。 1. We depend on energy to do many things. _ _ energy _ we depend on to do many things. 2. He didnt go to school because he was ill. _ _ because he was ill _ he didnt go to school.,It is,that,It was,that,Class exercises,3. My father didnt return until 11 oclock last night. _ _ _ _ 11 oclock _ my father returned last night. 4. David bought a walkman from a store yesterday. _ _ David _ bought a walkman from a store yesterday.,It was not until,that,It was,that / who,5. The mountain climber was rescued with the help of the local people. _ _ with the help of the local people _ the mountain climber was rescued. 6. Her uncle moved out of the city and settled down in a small village for this reason. _ _ for this reason _ her uncle moved out of the city and settled down in a small village.,It was,that,It was,that,7. What on earth do you want me to say? _ _ _ _ you want me to say? 8. I didnt receive the managers reply until nearly a month later. _ _ _ _ nearly a month later _ I received the managers reply.,What is it that,It was not until,that,9. Marx met Tracy in