1、Unit 4 Global warmingUnit 4The sixth period Teaching methods situational teaching method;cooperative learning method;programmed teaching method;task-based and assessment teaching methods.Teaching aims and demands一、topic:Global warming;pollution;the importance of protecting the earth二、vocabulary三、fun
2、ctions:Agreement and disagreementBlame and complaint四、grammar:The use of itArrangement of teachingthe first period:warming upthe second period:language points of readingthe third period:readingthe fourth period:learning about language and language points of using languagethe fifth period:using langu
3、agethe sixth period:grammarthe seventh period:exercises 1.Check up Daily Exercises(II)It(II)It的用法及强调句型的用法及强调句型性质功 能例 句代词用作人称代词，代替上文提到的人或事物。Who is it?Its me.Youve helped me a lot;Ill never forget it.性质功 能例 句代词用以代替指示代词this或that。Whats this?Its a computer Whose book is that?Its hers性质功 能例 句代词表示时间、天气、距离、
4、价钱等。Its time for lunchIts raining hardIts two miles from the school to our home引导词作形式主语,代替由不定式、动名词或从句等表示的真正主语。It is easy to buy a new radio.It is no use telling him that.It doesnt matter whether she comes or not.引导词作形式宾语,代替由不定式、动名词或从句等表示的真正宾语。I feel it my duty to helphim.We thought it no use doing t
5、hat.Ive made it clear that nobody is allowed to smoke here.引导词表示强调,其结构是:It is/was+强调部分+that+原句剩余部分。此结构只限于强调状语、主语和宾语。注意：如果强调的是人,其后用that或who 均可;如果强调的是物、时间或地点等状语,其后只能用that不用where、when、why。引导词I saw Tom yesterday here.It was I that/who saw Tom yesterday here It was Tom that/who I saw yesterday here It wa
6、s yesterday that I saw Tom here It was here that I saw Tom yesterday引导词注意:若原句是notuntil句型,在强调until 部分时,要把否定形式放入被强调部分。例如:He didnt leave until l returned.=It was not until I returned that he left易与强调句型*若强调谓语,则用do/does/did+动词原形,常译为“的确”“一定”等,该结构只能用于陈述句或祈使句中。引导的强调句与其它从句的区别在于：Do be patient!(一定要耐心点)He does
7、want to learn English well.(他的确想学好英语。)It was in the place that I was born.(强调句)It was the place where I was born.(定语从句)混淆的其它从句 强调句型中前后时态应一致;被强调的部分为主语、宾语和状语,若把it iswas和thatwho去掉,剩下的词语能重新组成正确的句子,而且不缺成分,否则就是其它从句。It was in 1945 that World War II ended.(强调句)It was 1945 when World War II ended.(定语从句)It wa
8、s a long time since I met you last.(时间状语)It is time that you went to bed.(定语从句)口诀：代词 it 本意它,既可指这又指那;时间天气均可指,谈到距离也用它;假主假宾均可做,强调句型跟that。1.It was this village _ I was bought.A.where B.that C.on which D.which2.It was in this village _ I was bought up.A.where B.that C.on which D.which3.Can it be in the d
9、rawer _ you put your passport?A.where B.in which C.there D.that4.It was July 1,1997 _ saw the return of Hong Kong to the motherland.A.that B.when C.which D.in which5.It is two years _ I joined the army.A.before B.since C.that D.after6.It was two years _ I joined the army.A.before B.since C.that D.af
10、ter7.-Was it under the tree _ you were away talking to a friend?-Sure.But when I got back there,the bike was gone.A.that B.where C.which D.while8.-Why dont we take a little break?-Didnt we just have _?A.it B.that C.one D.this9.It was not until 1920 _ regular radio broadcast began.A.while B.which C.t
11、hat D.since10._ is the fact that English is being accepted as an international language.A.There B.This C.That D.It11.It was about 600 years ago _ first clock with a face and an hour hand was made.A.that B.until C.before D.when12.I hate _ when people talk with their mouths full.A.it B.that C.these D.
12、them 13.It was only when I reread his poems recently _ I began to appreciate their beauty.A.until B.that C.then D.so14.It is the ability to do the job _ matters not where you come from or what you are.A.one B.that C.what D.it15.The Parkers bought a few house but _ will need a lot of work before they
13、 can move in.A.they B.it C.one D.which16._ no need for us to discuss the problem again since it has already been settled.A.It has B.There has C.It is D.There is17.Was it in 1969 _ the American astronaut succeeded _landing on the moon.A.when;on B.that;on C.when;in D.that;in18.Was _ that I saw last ni
14、ght at the concert?A.it you B.not you C.you D.that yourself19._ was in 1979 _ I graduated from the university.A.That;that B.It;that C.That;when D.It;when20.What a pity my new computer doesnt work!_ must be something wrong with it.A.It B.There C.This D.That21.I like _ in the autumn when the weather i
15、s clear and bright.A.this B.that C.it D.one22.Someone is knocking at the door,but who can _ be?A.one B.he C.she D.it23.A knock on the door made him look up.But _ was only the manager.A.this B.that C.she D.it24.Someone is ringing the doorbell.Go and see _.A.who is he B.who he is C.who is it D.who it
16、is 25.Is _ necessary to complete the design before National Day?A.this B.that C.it D.he26.Does _ matter if he cant finish the job on time?A.this B.that C.he D.it27.It worried her a bit _ her hair was turning grey.A.while B.that C.if D.for28.They have made _ a rule _in the room.A.this;not to smoke B.it;smoking C.it;to not smoke D.it;not to smokeMake four sentences with it for emphasis.Homework
