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高中英语外研版 (2019)必修 第二册Unit 1 Food for thought优质课件ppt
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这是一份高中英语外研版 (2019)必修 第二册Unit 1 Food for thought优质课件ppt，共16页。
Mdals（1）Lk at the sentences frm the reading passage. Think and wrkut the meanings f the wrds in bld.1 What is the difference between sentences (a) and (b)?
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. Healthy Eating Trainer Health & Fitness ★★★★☆（96） DwnladDetails Reviews RelatedIf yu dare nt try a “painful” diet t stay healthy，this new app is the perfect slutin—and yu needn’t pay fr it! The app wrks by quickly shwing phts f different fd. All yu have t d is select the phts f healthy fd. Then yu’ll be able t train yur brain t select healthy fd in real situatins. S，if yu’re a sugar addict and aren’t able t say n t chclate r cla，yu had better dwnlad it nw! Sn，yu’ll be filling yur cupbards with real healthy fd.
>习题参考答案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! Sn，yu’ll be filling yur cupbards with real healthy fd.
Cmplete the tips fr gd table manners with the crrect frm f the mdals in Activity 1. 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，yu 3 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
单元语法 情态动词（1） 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。【用法辨析】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。【学法点拨】 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 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 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 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！ 【误区警示】 • 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）
◆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）. ◆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.
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
harvesting/t be harvested
mending/t be mended
have watered
Mdals（1）Lk at the sentences frm the reading passage. Think and wrkut the meanings f the wrds in bld.1 What is the difference between sentences (a) and (b)?
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. Healthy Eating Trainer Health & Fitness ★★★★☆（96） DwnladDetails Reviews RelatedIf yu dare nt try a “painful” diet t stay healthy，this new app is the perfect slutin—and yu needn’t pay fr it! The app wrks by quickly shwing phts f different fd. All yu have t d is select the phts f healthy fd. Then yu’ll be able t train yur brain t select healthy fd in real situatins. S，if yu’re a sugar addict and aren’t able t say n t chclate r cla，yu had better dwnlad it nw! Sn，yu’ll be filling yur cupbards with real healthy fd.
>习题参考答案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! Sn，yu’ll be filling yur cupbards with real healthy fd.
Cmplete the tips fr gd table manners with the crrect frm f the mdals in Activity 1. 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，yu 3 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
单元语法 情态动词（1） 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。【用法辨析】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。【学法点拨】 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 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 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 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！ 【误区警示】 • 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）
◆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）. ◆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.
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
harvesting/t be harvested
mending/t be mended
have watered
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