2019新人教選擇性必修三Unit2Discover useful structures公開課學(xué)案

1、2019新人教高中英語選擇性必修三Unit2 Discover useful structures 學(xué)案.To master the usage of the infinitive as subject.To use the relevant grammar flexibly and authentically in real situation.To understand the difference between the infinitive as subject and v.-ing form as subject.Part I ObservationActivity 1 Look a

2、t the following sentences and pay attention to the italicized infinitives tell their meanings and functions.1.7b change bad habits is never easy.2.It took the surgeon three hours to finish my mother fs lung surgery.3.To join the Peoples Liberation Army,it is required for men to shave off their beard

3、s.4.It was not polite to disturb your neighbours with loud music last night.The infinitive in each sentence functions as .Summary kmeanings and functions of the infinitive of the verb as the subject.Activity 2 Find more infinitives in the reading passage.Part II Self-directed studyActivity 1 Fill in

4、 the blanks using the right form of the word,and try to change it into another sentence pattern.Lit is important Tom to get that job.It is kind you to help me with my homework.(talk) with him is a great pleasure.一It is .(help) others is our duty,一.It took Tom 2 hours.(作準(zhǔn)備)Summary 2:不定式作主語,it作形式主語的常見

5、結(jié)構(gòu):例1It is easy for me to learn how to drive.學(xué)開車對我來說很輕松。It is clever of you to apply for the position.你申請這個職位真是明智的。例2It is our duty to take care of you,照顧你是我們的責(zé)任。例3It takes me half an hour to do my housework.我花了半個小時做家務(wù)。Activity 2 Compare the two sentences below and tell the difference in meaning.To

6、look after children is her job today.她今天的工作是看孩子。.Looking after children is her work.她的工作是照顧孩子。Summary 3:不定式作主語和動詞工g形式作主語和動詞的區(qū)別：More examples:Smoking is prohibited here.這里禁止抽煙。（抽象）It is not very good for you to smoke so much.你抽這么多煙對你身體很不好。 （具體）Climbing mountains is interesting.爬山很有趣。（的事或經(jīng)驗）To finish

7、the task will take a long time.要完成這項任務(wù)將要花費很長時間。（未完成的事或目的)Complete the sentences.Join the words to make full sentences using the infinitive.important/avoid/passive cigarette smoking.will take/nutrition specialist/a balanced diet menu/make/an hour/for you.useful/turn to/fitness consultant/for advice4.

8、illegal/dangerous/take/drugs5.harmful/skip breakfast/oftenSummary 4:Analyse the sentence patternsActivity 1 Fill in the blanks.1.Sometimes its better (remain) silent.Although is a hard task to protect the environment,we cant help but go ahead.(control) the air pollution is necessary.It was foolish h

9、im to endanger his life in that way.Dont you think it is rude him to ask a lady her age?.It is difficult him to live on such a small salary.Summary 5:1 .如果要說明不定式表示的動作是誰做的，可以在不定式前加一個由for/of 引起的短語，構(gòu)成。2.It is+adj.+for sb to do(修飾物的形容詞)(4/.:easy,difficult,comfortable,pleasant Jight,dangerous,tiresome,in

10、teresting,hea vy,fit)It is+adj.+ of sb to do(修飾人的形容詞)(tz4/.:kind,good,nice,wise,unwise,clever,silly,stupid,foolish,careless,rude,polite,n aughty)Activity 2 Complete the conversation with the correct forms of the phrases in the box.begin with be in control of make a choicedecide on make up ones mind.

11、A:Hello,doctor.! want to lose weight,but I just cant seem to do it.What can you do to help me?B:Well,first,its necessary to what you eat.Cut out all fatty food and sugary drinks,and eat more fruit and vegetables.A:I really need to a way to exercise more.I could use a fitness app,but my phones full.B

12、:So delete a few files.Fm sure the app doesnt take up much space.A:Before exercising,always do a few warm-ups to .B:I know.But then I always feel too tired to continue!.A:Should I go for the pizza or the fried chicken?! hate likethese.You know what 一Im going to eat both!B:Wow! Dont eat too much junk

13、 food一youll get fat.Fve actually to go on a diet,so ril just stick to the fruit salad.Activity 3 Complete the sentences using the correct forms of the words.(lean) out of the window is dangerous.(save) money now seems impossible.It is an offence (drop) litter in the street.It is stupid of you (write

14、) down everything that the teacher says.5.(say) is one thing and to do is another.6.It seemed a pity (waste) so much time.7.1 don9t think (你問是不禮貌的)how long theinterview will last.(保衛(wèi)是我們的職責(zé))the country against itsenemies.(花了我半個小時)to wash the clothes.Part V核心素養(yǎng)專練1.1 like eating fried tomatoes with egg

15、s,and I thought it must be easy (cook).2.1t is easy for them (care) for.3.1t was so good (feel) accepted for what Im good at.4.1t,s my first time(hear) Chinese stories told by an English speaker.5 .Then we will know how important is to have meaning in our life.6.It is not a simple matter(determine)

16、the nature of talent.7.(learn) to think critically is an important skill todays children will need for the future.8.On our way to the house,it was raining so hard that we couldnt help wondering how long it would take (get) there.參考答案Part IActivity 1the subject of the sentenceSummary 1:動詞不定式在句中作主語，有時

17、為了保持句子的平衡，防止頭重腳輕，常用讓作形式主語，而真正的主語放在句子的末尾。比方第2、3、4例句。Activity 21.1 can be easy for some of them to form bad habits.2.After all,it is not easy to break bad habits.Activity 1.for;of.To talk;a great pleasure to talk with him.To help;It is our duty to help others.to make preparationsSummary 2:例 l:It is +a

18、dj.+(ior sb) to do;It is +adj.+(oi sb) to do彳列 2:It is +n.+ to do sth(an honour,our duty,a pity,a shame)例 3:It takes/took sb some time to do sthSummary 3:動詞-沅g形式和不定式作主語都是說明一個內(nèi)容。不定式通常表 示一個將來的、具體的內(nèi)容;而動詞切g(shù)形式那么表示一種經(jīng)常性的、習(xí)慣的或抽象 的概念。t is important to avoid passive cigarette smoking.2.It will take a nutrition specialist an hour to make a balanced diet menu for you.3.1t