高中英语人教版 (2019)选择性必修 第三册Unit 2 Healthy Lifestyle备课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备课ppt课件，共16页。PPT课件主要包含了keys，语法研析，语法总结等内容，欢迎下载使用。

1.Enable the Ss t master the usage f the infinitive f the verb as the subject2.Enable the Ss t use the relevant grammar flexibly and authentically in the real situatin.
Teaching Gals
The Infinitive
(t d ……)
单元语法自我探究
Lk at the fllwing sentences and pay attentin t the italicized infinitives. Find mre infinitives in the reading passage, and tell their meanings and functins.1. T change bad habits is never easy.2. It tk the surgen three hurs t finish my mther’s ling 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.
Mre infinitives in the reading passage1….it can be easy fr sme f them t frm bad habits.2. After all, it is nt easy t break bad habits.
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。
Their meanings and functins
不 定 式 主 动 被 动  一 般 t write t be written  进 行 t be writing   完 成 t have written t have been written  完成进行 t have been writing 
4. It is imprtant ______ Tm t get that jb. It is kind ______ yu t help me with my hmewrk.
1. ______( talk ) with him is a great pleasure. 2. ______( help ) thers is ur duty.
It is ur duty t help thers
3.It is easy____________ __________ (学生读)
fr the students t read.
不定式作主语和动词-ing形式作主语和动词的区别：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。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。
不定式作主语，it 做形式主语的常见结构：It is +adj.+(fr sb) t dIt 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 dIt is clever f yu t apply fr the psitin.你申请这个职位真是明智的。It is +n.+ t d sth( an hnur, ur duty, a pity, a shame)It is ur duty t take care f yu.照顾你是我们的责任。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。
疑问词 + 不定式 做主语可用于该结构的疑问词疑问代词：wh，whm，what，which 疑问副词：when，where，hw 常接该结构的动词：knw，see，decide，tell，ask，cnsider，explain，learn，wnder Hw t cnstruct the theretical framewrk is very imprtant. 怎样构建理论框架很重要。（作主语）When t start develping such a vaccine is the questin . 问题是何时开始研制这种疫苗。（作主语）Where t find that patritic yung man is a headache fr me. 到哪里去找那个爱国的年轻人令我头疼。（作主语）练习：1.When and where 　　　　 　（vte） hasn’t been decided. 2.　　_______________　　（何时装修） the huse hasn’t been decided
When t decrate
3. 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_______________。
2. 不定式作主语时,可以用it作_______________.
It is+adj+fr sb t d …… 5. It is+adj+ f sb t d………
(adj: kind, gd, nice, wise, unwise, clever, silly, stupid, flish, careless, rude, plite, naughty)
1.单个不定式作主语，谓语动词_____________
(adj.: easy ,difficult, cmfrtable, pleasant, light , dangerus， tiresme, interesting , heavy, fit)
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
完成句子（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.
it is implite f yu t ask
It’s ur duty t defend
It tk me half an hur
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 advice4.illegal /dangerus/take /drugs5.harmful/skip breakfast/ften
1. imprtant/avid/passive cigarette smking.It is imprtant avid passive cigarette smking.2. will take/nutritin specialist/a balanced diet menu/make /an hur/fr yu.It will take a nutritin specialist an hur fr yu t make a balanced diet t/fitness cnsultant/fr adviceIt is useful t turn t fitness cnsultant fr /dangerus/take /drugsIt is illegal and dangerus t take breakfast/ftenIt is harmful t ften skip breakfast.