高中英语人教版 (2019)选择性必修 第三册Unit 2 Healthy Lifestyle图片ppt课件

这是一份高中英语人教版 (2019)选择性必修 第三册Unit 2 Healthy Lifestyle图片ppt课件，共16页。PPT课件主要包含了Summary 1， for，To talk，To help，to remain ，it ，of ，for ， Summary 5，to cook等内容，欢迎下载使用。

Teaching bjectives:
By the end f this perid, yu will be able t…
1.master the usage f the infinitive as the relevant grammar flexibly and authentically in real the difference between the infinitive as subject and V-ing frm as the subject.
1. T change bad habits is never easy.2. It tk the surgen three hurs t finish my mther’s lung jin the peple’s Liberatin Army, it is required fr men t shave ff their beards.4. It was nt plite t disturb yur neighbrs with lud music last night.
Lk at the fllwing sentences and pay attentin t the italicized infinitives, and tell their meanings and functins.
meanings and functins
⁎The infinitive in each sentence functins as the subject f the sentence.
Meanings and functins f the infinitive f the verb as the subject.
动词不定式在句中做主语，有时为了保持句子的平衡，避免头重脚轻，常用it做形式主语，而真正地主语放在句子的末尾。比如第2,3,4例句。
1__________________________________________________ 2___________________________________________________ ...
Activity 1 Find mre infinitives in the reading passage.
….it can be easy fr sme f them t frm bad habits.
After all, it is nt easy t break bad habits.
Activity2:Fill in the blanks using the right frm f the wrd, and try t change it in anther sentence pattern.
Step II Self-directed study
1. It is imprtant ______ Tm t get that jb. It is kind ______ yu t help me with my hmewrk. 2. ______( talk ) with him is a great pleasure. → It is______________________________3. ___________( help ) thers is ur duty. →______________________________4.It tk Tm 2 hurs ______________________ . (作准备)
t make preparatins
a pleasure t talk with him.
It is ur duty t help thers.
Summary 2:
例1. It is +adj.+(fr sb) t deg: It is easy fr me t learn hw t drive.学开车对我来说很轻松。 It is +adj.+(f sb) t deg:It is clever f yu t apply fr the psitin. 你申请这个职位真是明智的。例2. It is +n.+ t d sth( an hnur, ur duty, a pity, a shame)eg:It is ur duty t take care f yu. 照顾你是我们的责任。例3. It takes/tk sb sme time t d sth.It takes me half an hur t d my husewrk. 我花了半个小时做家务。
不定式作主语，it 做形式主语的常见结构：
T lk after children is her jb tday.她今天的工作是看孩子。Lking after children is her wrk.她的工作是照顾孩子。
Summary 3不定式作主语和动词-ing形式作主语的区别：
Activity3:Cmpare the tw sentences belw and tell the difference in meaning.
动词-ing形式和不定式作主语, 都是说明一个内容。不定式通常表示一个将来的、具体的内容;但是, 而动词-ing形式则表示一种经常性的、习惯的或抽象的概念。
Mre examples:
Smking is prhibited here.这里禁止抽烟。(抽象)It is nt very gd fr yu t smke s much.你抽这么多烟对你身体很不好。(具体)Climbing muntains is interesting.爬山很有趣。(已知的事或经验)T finish the task will take a lng time.要完成这项任务将要花费很长时间。(未完成的事或目的)
Step III Cmplete the sentences.
Activity 4 Jin the wrds t make full sentences using the infinitive.
1. imprtant/avid/passive cigarette smking.____________________________________________________________2. will take/nutritin specialist/a balanced diet menu/make /an hur/fr t/fitness cnsultant/fr advice_____________________________________________________________4.illegal /dangerus/take /drugs_____________________________________________________________5.harmful/skip breakfast/ften__________________________________________________________________
It is imprtant t avid passive cigarette smking.
It will take a nutritin specialist an hur fr yu t make a balanced diet menu.
It is useful t turn t fitness cnsultant fr advice.
It is illegal and dangerus t take drugs.
It is harmful t ften skip breakfast.
Summary4: 1.单个不定式作主语，谓语动词 ________ 2. 不定式作主语时,可以用 it 作__________.
StepIV. Analyze the sentence patterns Activity5:单句语法填空
（1）Smetimes it’s better 　　　　 　（remain） silent. （2）Althugh 　　 　 is a hard task t prtect ur envirnment，we can’t help but g ahead. （3） 　 　（cntrl）the air pllutin is necessary. （4）It was flish 　 　 him t endanger his life in that way. （5）Dn’t yu think it is rude　　 　 him t ask a lady her age? （6）It is difficult 　　 　 him t live n such a small salary.
T cntrl/Cntrlling
1.如果要说明不定式表示的动作是谁做的，可以在不定式前加一个由 fr/f 引起的短语,构成不定式的复合结构。2.It is+adj+fr sb t d …（修饰物的形容词）(adj.: easy ,difficult, cmfrtable, pleasant, light , dangerus， tiresme, interesting , heavy, fit) It is+adj+ f sb t d…（修饰人品形容词）(adj: kind, gd, nice, wise, unwise, clever, silly, stupid, flish, careless, rude, plite, naughty)
1. A: Hell, dctr. I want t lse weight, but I just can 't seem t d it. What can yu d t help me? B : Well, first, it's necessary t ______________ what yu eat. Cut ut all fatty fd and sugary drinks, and eat mre fruit and vegetables.2.A: I really need t ________a way t exercise mre. I culd use a fitness app, but my phne's full. B: S delete a few files. I'm sure the app desn't take up much space.3 A: Befre exercising, always d a few warm-ups t___________________. B:I knw. But then I always feel t tired t cntinue!4. A: Shuld I g fr the pizza r the fried chicken? I hate _____________ like these. Yu knw what —I'm ging t eat bth! B: Ww！Dn't eat t much junk fd-yu'll get fat. I've actually _______________ t g n a diet, s I'll just stick t the fruit salad.
be in cntrl f
begin with
t make chices
Activity 6 Cmplete the cnversatin with the crrect frms f the phrases in the bx .
made up my mind
begin with be in cntrl f make a chice decide n make up ne’s mind
1． (lean) ut f the windw is dangerus. 2． (save) mney nw seems impssible. 3．It is an ffence (drp) litter in the street. 4．It is stupid f yu (write) dwn everything (that) the teacher says. 5．__________(say) is ne thing and t d is anther. 6．It seemed a pity __________________(waste) s much time.7. I dn’t think 　_____________________________（你问……是不礼貌的） hw lng the interview will last. 8. 　　　　　　　　　　　（保卫…… 是我们的职责） the cuntry against its enemies. 9. 　　　　　　　　　　　（ …… 花了我半个小时）t wash the clthes.
Activity 7. Cmplete the sentences using the crrect frms f the wrds.
t have wasted
it is implite f yu t ask
It’s ur duty t defend
It tk me half an hur
1. I like eating fried tmates with eggs, and I thught it must be easy______(ck) . 2.It is easy fr them ________(care) fr.  3.It was s gd _______(feel) accepted fr what I’m gd at. 4.It’s my first time_______(hear) Chinese stries tld by an English speaker.