外研版 (2019)必修 第二册Unit 1 Food for thought教学演示ppt课件

这是一份外研版 (2019)必修 第二册Unit 1 Food for thought教学演示ppt课件，共38页。PPT课件主要包含了Modals 1，have to ，dare not，needn’t，fishy，情态动词1，用法辨析，can 　，cant 　，could 　等内容，欢迎下载使用。
Using language
Lk at the sentences frm the reading passage. Think and wrk ut the meanings f the wrds in bld.
a was able t hld a knife and frk—and chpsticks! b But there are still sme dishes that Dad dare nt try even after many years f marriage t my mther. c and I just have t find a way t get him int the kitchen! d ’d better nt eat t much rast fd as it may make us suffer frm heat inside ur bdies，... e “Yu needn’t try it if yu dn’t want t，”Mum said，...
Nw talk abut the functin f mdals. Then match the meanings t the wrds in bld abve. 1 be afraid t d smething 2 nt be necessary t d smething 3 give advice t d r nt t d smething 4 be necessary r give strng advice t d smething 5 have the ability t d smething
a-5　b-1　c-4　d-3　e-2
Underline the mdals in the intrductin t an app and talk abut their meanings.
Cmplete the tips fr gd table manners with the crrect frm f the mdals in Activity 1.
If yu dare nt（be afraid t d smething）try a “painful” diet t stay healthy，this new app is the perfect slutin—and yu needn’t（nt be necessary t d smething）pay fr it! The app wrks by quickly shwing phts f different fd. All yu have t（be necessary t d smething）d is select the phts f healthy fd. Then yu’ll be able t（have the ability t d smething）train yur brain t select healthy fd in real situatins. S，if yu’re a sugar addict and aren’t able t（dn’t have the ability t d smething）say n t chclate r cla，yu had better（give advice t d smething）dwnlad it nw!
While ging n yur first trip t the UK is exciting，new and different custms can als be cnfusing. Table manners are n exceptin. But dn’t wrry—here are sme tips： Yu 1 　　　　 wait until everyne else has been served befre yu start eating. Smetimes there are s many knives and frks that yu 2___________ pick them up in case yu get it wrng. The trick is t start with the nes n the utside.
When yu finish yur meal，yu3 　 　　　 place the knife and frk tgether n yur plate with the handles at the fur ’clck psitin. Table manners，hwever，can differ in different situatins. Fr example，yu 4 　　 　　 use a knife and frk when eating a hamburger r pizza. Just remember：when in Rme，d as the Rmans d，and yu will 5 　　　　　　 enjy the lcal cuisine!
had better
Read and match the cmments t the pictures.
1 Backyard BBQ, Kansas City, US
The mst tender steak I've ever had! The barbecue gives it that famus smky flavur, and it cmes with a shiny sauce that's very, very spicy!
2 Bund 59, Shanghai, China
A bwl f sup with a large, rund meatball! The meatball is cked thrugh, which lked slightly pink inside. Incredibly sft and juicy - it melts in the muth!
3 Antni's Pizzeria. Lndn.UK
Wrst pizza ever! I rdered a large vegetarian pizza, but it was tiny! It was served cld and came with sme srt f sticky sauce which tasted bitter and smelt really fishy! The waiter even spilled sme beer n me!
4 Madame Laurent's Bakery, Paris, France
Yu've gt t try the strawberry cheesecake. lt's smth and creamy with fresh strawberries, which give it a lvely sweet and fruity taste. Highly recmmended!
Underline the wrds that describe fd in Activity 4 and put them int the table. Add any mre yu can think f.
shiny large rundpink tiny fresh
smky spicy bitter sweet fruity
tender sft juicy cld sticky smth creamy
Wrk in pairs. Talk abut yur favurite fd using the wrds yu have learnt.
A: What's yur favurite fd?B: My favurite fd : Hw des it lk / smell / taste /feel?B: It lks / smells / tastes / feels…
Healthy eating
Listen t the cnversatin and tick the fd and drinks rdered.
Listen again and cmplete the ntes.
Nw talk abut what Harriet says t persuade Janet.Listen again if necessary.
Wrk in pairs. Act ut the cnversatin t persuade a custmer t buy a new mixed fruit drink.
Student A: Turn t Page 105. Student B: Turn t Page 108.
Wrk in pairs. Think f a similar situatin and have a cnversatin.
情态动词表示说话人的某种语气或情绪，如可能、意愿、猜测、义务、需要等。情态动词有一定的词义，但不能单独作谓语，后面接动词原形； 没有人称和数的变化（be able t，have t 除外）；有些情态动词有过去式，如：can—culd，may—might，will—wuld，dare—dared，have t—had t 等。
1 be able t be able t 后接动词原形，表示某人做某事的能力，可用于大多数时态。 用于过去时态时，还可表示“某人过去或当时成功地做了某事”。I will be able t speak German in anther tw mnths. 再过两个月我就能说德语了。I haven’t been able t read that reprt yet.我还没能看那份报告。 They were able t escape frm the building when the fire brke ut. 火灾发生时，他们设法从大楼里逃了出来。
can与 be able t （1）can 与 be able t 都表示能力，在许多情况下可以交替使用。 但can只有现在式和过去式（culd），而be able t 则有更多的形式。（2）can 一般指自身具有的能力，而如果要表达将来的能力，一般要用will be able t。（3）be able t 的过去式 was/were able t 在肯定句中可表示过去设法做成了某事，相当于managed t d，而culd 则无此意义。
◆选词填空（be able t/can） （1）The plice are ding all they 　　 　　 t find her. （2）Yu must 　 　　　　 　　 speak French fr this jb. （3）This time I failed the exam，but I’ll 　　 　　　　 pass the exam next time.（4）The fire was very big，but mst peple 　　　　　　　　 escape frm it. （5）I 　　　give yu details because I dn’t actually have any details. （6）He 　 　 　　　　 cme again tmrrw because he is busy. （7）When he was yung，he 　　 　　 swim very fast. （8）I’m srry I 　　 　 answer yur letter in time. （9）He said that Tm 　　　 　　　　　 get there n time because he gt up late.
be able t 　
were able t
wn’t be able t 　
haven’t been able t 　
wasn’t able t/culdn’t 　
2 dare dare 意为“胆敢，敢于”，既可作情态动词，又可作实义动词。（1）dare 作情态动词时，没有人称和数的变化，但有过去式dared， 后接动词原形，否定式为dare nt/daren’t，多用于否定句或疑问句。I am s afraid that I dare nt mve. 我害怕得不敢动。 Dare yu tell her the truth? 你敢告诉她真相吗？ She dared nt breathe a wrd f it t anybdy. 她对任何人都只字不提此事
（2）dare 作实义动词时，有时态、人称和数的变化，后接带t的不定式，否定式要在其前加dn’t/desn’t/didn’t。不定式符号t有时可以省略。I am s afraid that I dn’t dare t mve. 我害怕得不敢动。 D yu dare t fight him? 你敢和他对抗吗？ He didn’t dare（t）say what he thught. 他不敢说出他的想法。情态动词dare 可用于以下结构： I dare say... 我想/ 我认为…… Hw dare 你怎么敢……？ I dare say he will fail. 我认为他会失败。 Hw dare yu say such a thing? 你怎么敢说这样的话？
◆一句多译她晚上不敢一个人出去。（1）　　 　　　 　　　　　　　 　　（dare 作情态动词） （2）　　　　 　 　　　 　　（dare 作实义动词） 她晚上敢一个人出去吗？ （3）　　　　　 　　　　　　 　 　　（dare 作情态动词） （4）　　　　　 　　　　　　　 （dare 作实义动词） ◆完成句子（5）He wanted t ask her，but he 　　 　　 　（不敢）. （6） 　 　　　 　　（我认为） yu have knwn abut it already. （7） 　　　　　　　 　（你竟敢用） my car withut asking!
She dare nt g ut alne at night. 　
She desn’t dare (t) g ut alne at night. 　
Dare she g ut alne at night? 　
Des she dare (t) g ut alne at night? 　
dared nt/didn’t dare 　
I dare say 　
Hw dare yu use 　
3 have t 表示“必须，不得不”，是由于客观情况而“必须”，have t 的否定形式dn’t have t 表示“不必”，可用于各种时态中。They had t put ff the sprts meeting because f the bad weather. 由于天气不好，他们不得不推迟运动会。Yu dn’t have t knck—just walk in. 不必敲门——进来就是了。 I have t learn anther language. 我不得不学另一种语言。（客观情况使得） I must learn anther language.我必须学另一种语言。（说话人的意愿） Yu dn’t have t tell thers. 你不必告诉别人。Yu mustn’t tell thers. 你不准告诉别人。
◆选词填空（have t/must） （1）This bk 　　　　 nt be remved frm the library. （2）Jackie is ill s they 　　　　 　 change their plans. ◆完成句子（3）She 　　　　　　　　 　（必须自己做）. I wn’t help her. （4）She 　　　　　　　　 　（不得不自己做）. She has gt n ne t help her. （5）Yu 　　　 　　　 　 　（千万别说） things like that.（6）Yu 　　　　　　　　 　（不必说）things like that t me.
must d it herself 　
has t d it herself 　
mustn’t say 　
dn’t have t say 　
4 had better 意为“最好”，主要用来表示劝告或建议。用于一般现在时或一般将来时，适用于所有人称，否定式为had better nt。had better d sth. 最好做某事had better nt d sth. 最好不要做某事We had better call in a specialist at this critical mment. 在这个关键时刻我们最好请一位专家来。Yu had better nt d that. 你最好不要那样做。 We’d better nt just talk and let’s help them. 我们最好不要光说不做，让我们来帮助他们。
◆完成句子（1）I think yu 　　　　 　　　　　　　　 　（最好去找医生看看）abut yur cugh. （2）We 　　　　　　　　 　（最好现在就走） r we’ll miss the bus. （3）Befre getting the driver’s license，yu ____________________（最好不要驾驶）the car n the rad.
had better g t the dctr
had better leave nw 　
had better nt drive 　
5 need 意为“需要，有必要”，既可作情态动词，又可作实义动词。（1）need 作情态动词时，没有人称和数的变化，后接动词原形，常用于否定句或疑问句中，否定式为need nt/needn’t，意为“不必”。needn’t have dne 表示实际上做了本来不必做的事，意为“本来不必”。Yu needn’t finish that wrk tday. 你不必今天做完这项工作。 Need I pay the whle amunt nw? 我必须现在全部付清吗？ Yu needn’t have wrried abut the dinner — it was delicius! 你原本不必为这顿饭担心的——味道棒极了！
• 以need 开头的疑问句，否定回答可用needn’t，肯定回答用must。 • 以must 开头的一般疑问句，肯定回答用must，否定回答用needn’t 或dn’t have t。（2）need 作实义动词时，有人称和数的变化，后接名词、代词、动名词、带t的不定式，用于陈述句、否定句或疑问句中均可，否定式和疑问式要借助助动词d/des/did。need 作实义动词时常用于下列句式： sb. need（s）t d sth. 某人需要做某事（主语与d 为主动关系） sth. need（s）ding/t be dne 某事/ 某物需要被……（主语与d为被动关系）
动名词主动表被动：“需要” need、want、requireEg： He needs encuraging. Yur hair wants cutting. My phne requires repairing.2. “值得” (be) wrth （prep）、deserve、meritEg： The film is wrth seeing twice. Nne f it deserves keeping. They merit praising.3. “超越” past、beyndEg： He is past saving. 他已经无法抢救了 The prblem is beynd understanding.
t be encuraged.
t be repaired.
◆完成句子（1）I lve the weekend，because I 　　　　 　 　　　　　　（不必早起）n Saturdays and Sundays. （2） 　　　　　　　（我需要召集） the children tgether at nce? （3）We 　　　　 　　　　　　（不必打扮）. The party has been called ff. （4）I was a little nervus when I annunced my engagement t Grace，but I _________________________（本来不必担心）. （5）—Must I ask fr her permissin? —N， 　　 　 　　 　（你不必）.
needn’t get up early 　
Need I gather
dn’t need t dress up 　
needn’t have wrried 　
yu needn’t/dn’t have t 　
◆单句语法填空（6）The green beans need 　　 （harvest）. （7）My bike needs 　 　　　（mend）. （8）Yu needn’t 　 　　　（water）the flwers，fr it is ging t rain.
harvesting/t be harvested 　
mending/t be mended 　
have watered