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2019-2020年高一英語下冊 Unit19 Modern agriculture(第五課時)教案 大綱人教版第一冊 Teaching Aims: 1.Review the different usages of “it”. 2.Get the students to remember some useful sentence patterns. 3.Get the students to do more exercises so that they can master the grammar item. Teaching Important Points: Master the different uses of “it”,esp,the emphatic use and the use as a preparatory subject or a preparatory object. Teaching Difficult Point: How to master and use “it ” correctly. Teaching Methods: 1.Review method to revise the mon use of “it”. 2.Inductive method to go through some sentence patterns with “it”. 3.Practice to consolidate the use of “it”. Teaching Aids: 1.a projector and some slides 2.a puter for multimedia use Teaching Procedures: step Ⅰ.Greetings and Revision (Teacher greets the whole class as usual and shows the screen.) T:So far weve learned several uses of “it”.Now please look at the screen.Discuss the sentences with your partner and tell what the word “it”in each sentence refers to and its function.Write your answers on a piece of paper and later Ill ask some students to say the answers. Discuss the following sentences and tell the function of “it”. 1.Its difficult to remember all their names. 2.Its very quiet in the cafe. 3.It rained for three days. 4.He made it clear that he didnt want to speak to me. 5.It was nice seeing you. 6.It was on Tuesday that Mrs.Smith came. 7.Its three miles from here to the nearest garage. 8.A tall man stood up and shook hands.It was captain Lawrie. 9.I hear you bought a new bike.Can you show it to me? 10.It was five oclock when we got back home yesterday. 11.It was dirty and wet below the ship where the slaves were kept. 12.It was on this coast that lots of his people disappeared. 13.It was most likely that one third of them had lost their lives. (After a few minutes.) T:Are you ready? Ss:Yes. T:Who will give us the answers?One student,one sentence.Volunteers? SA:“It” is used as a formal subject in the first sentence.Its real subject is the infinitive“to remember all their names.” SB：2.“It”refers to present situation. SC:3.“It”refers to “weather”. SD:4.“It”is used as a formal object. SE:5.“It” is used as a formal subject. SF:6.This sentence is an emphatic structure,emphasizing the adverbial of time. SG:7.“It” is used here as an impersonal pronoun,referring to distance. SH:8.“It”here is used to point out definitely a person. SI:9.“It”here is applied to a new bike. SJ:10.“It”refers to time. SK:11.“It”is used as the subject,expressing state of things in general. SL:12.This sentence is also an emphatic construction,emphasizing adverbial of place “on this coast”. SM:13.The word “it”here is used as a formal subject. T:Quite right.As we all know,the word “it”can be used as a personal pronoun.In this case,“it”is not generally applied to a person,but to a thing or an animal just mentioned,such as“Sentence 9”.Secondly,“it” is used as a subject in expressions of time,weather,distance,etc,such as,in Sentence 2,3,7,10,11.Thirdly,“it”can be used as a formal subject or object.(The real subject is an infinitive or gerundial phrase or a clause.)Such as,in sentences 1,4,5,13.Fourthly,in Sentence 8,“it”points to a person and is called the Demonstrative it.It can also be used in the emphatic structure,such as in sentence 6,12. Step Ⅱ.Practice T:From the exercise weve done just now,we can see that you are all familiar with the mon use of“it”.Next,lets see some important sentence patterns.Now,Ill give you an exercise on the screen.(Show the screen.)Pair work or group work.Some of the patterns are perhaps not familiar to you.If so,look at the answers some minutes later and remember them. plete the sentences,paying attention to the structures of them and the use of“it”. 1.__________ (據(jù)報道)that dozens of children died in the accident. 2.__________(真遺憾)that he cant swim at his age. 3.__________(很可能)that they will beat us tonight. 4.__________(看來)that he enjoys pop songs very much. 5.__________(還是一個問題)when we shall have our sports meet. 6.__________(還不確定)whether he can attend this conference or not. 7.__________(不要緊，沒關(guān)系)whether we go together or separetely. 8.It is up to you__________(決定是否接受這項工作). 9.It is important__________(我們學(xué)英語). 10.It is kind__________(你幫助我). 11.It took me five days__________(解決這問題). 12.Its no use__________(與她爭論). (Some minutes later,teacher shows the answers on the screen to let the students check.) Suggested answers: 1.It was reported… It be+ p.p known,thought,told,believed,hoped…)that clause. 2.Its a pity… It+be+n.(an honour,a good thing,a fact,a surprise…)+that clause. 3.It is likely… It be+ adj.(wonderful,ture,important,surprising,clear,…)+that clause 4.It seems It seem/appear/happen+that clause. 5.It is still a question… It be + n.+whether/when/where clause 6.It is uncertain… It be + adj.(not decided,uncertain)+whether/when/how clause 7.It doesnt matter… It doesnt matter(Its no wonder.It doesnt make too much difference…)+wh-/how clasue 8.to decide whether to take the job or not Its up to sb.to do sth. 9.for us to learn English It be+ adj.(difficult,easy,hard,important)for sb.to do sth. 10.of you to help me It be+ adj.(kind,nice,brave,clever,stupid…)+of sb.to do sth. 11.to solve the problem It took sb.+time +to do sth. 12.arguing with her Its no use/no good/useless doing sth. Step Ⅲ.Practice T:(Teacher shows the screen.)There are some other useful sentence patterns for you.Please do the exercise on the screen.Have a discussion with your classmates. plete the sentences: 1.__________(已經(jīng)有三年了)since his father passed away. 2.__________(不久)the police arrived. 3.__________(已經(jīng)八點(diǎn)了)when we got home. 4.__________(該……)she wrote a letter to her boyfriend. 5.__________(這是第一次)these Europeans have visited the Great Wall. 6.__________(我們該……)to go to school. T:(Some minutes later.)Have you fi-nished it?Now look at the screen.(Teacher shows the screen.)Please remember these sentence patterns. Suggested answers: 1.It is/has been three years 2.It was not long before 3.It was already 8 oclock 4.It is high time that 5.It is the first time that 6.It is time for us Useful sentence patterns: 1.It be+a period of time+since-clause. 2.It be+a period of time+before-clause. 3.It be+a definite time+when-clause. 4.It be(high)time+that-clause. 5.It be+the first(second,third) time+that-clause. 6.It be+time for sb.to do sth. Step Ⅳ.Test T:Now lets have a quiz.Please look at the screen and do the exercise on it. Choose the right answers: 1.Does__________matter if he cant finish the job on time? A.this B.that C.he D.it 2.It was not__________she took off her dark glasses__________I realized she was a famous film star. A.when;that B.until;that C.until;when D.when;then 3.Toms mother kept telling him that he should work harder,but__________didnt help. A.he B.which C.she D.it 4.__________is a fact that English is being accepted as an international language. A.There B.This C.That D.It 5.It was about 600 years ago__________the first clock with a face and an hour hand was made. A.that B.until C.before D.when 6.Was__________that I saw last night at the concert? A.it you B.not you C.your D.that yourself 7.__________was in 1979__________I graduated from the university. A.that;that B.It;that C.That;when D.It;when Suggested answers: 1.D　2.B　3.D　4.D　5.A　6.A　7.B Step Ⅴ.Summary and Homework T:In this class,weve gone over the use of “it”.Can you remember it?Lets recall it together.“It” can be used as a personal pronoun…(The Design of the Writing on the Blackboard.)There are some useful sentence patterns.They are….After class,make sentences with them.Next class,Ill call some students to say their sentences to us.Thats all for today.Class is over. Step Ⅵ.The Design of the Writing on the Blackboard Grammar:The Use of “it” The Fifth Period 1.The Personal“It”:applied to a thing or an animal mentioned 2.The Impersonal“It”:referring to time,weather,distance,the state of things in general 3.The Demonstrative“It”:pointing to a person or a thing or the thing spoken of; 4.The Expletive“It”:A:a formal subject or a formal object; B:the Emphatic“It”:It is…that(who)… Some useful sentence patterns: It is reported that…: It is/has been three years since… It is a pity that…: It is not long before … … Step Ⅶ.Record after Teaching _____________________________________ _____________________________________ _____________________________________ _____________________________________