高中英语外研版 (2019)必修 第二册Unit 1 Food for thought课文配套ppt课件

这是一份高中英语外研版 (2019)必修 第二册Unit 1 Food for thought课文配套ppt课件，共14页。PPT课件主要包含了Modals， 基本用法，daren’t，needn’t，have，had等内容，欢迎下载使用。
a. be able tb. dare nt c. have t d. had bettere. needn’t
1. be afraid害怕 t d smething2. nt be necessary t d smething3. give advice t d r nt t d smething4. be necessary必要的 r give strng advice t d smething5. have the ability能力 t d smething
Match the meanings t the phrases.
情态动词(Mdals)表示说话人的某种语气或者情绪，如：可能，意愿，猜测，义务，需要等。情态动词本身具有一定的词义。常见的情态动词包括can (culd), may (might), will (wuld), shall (shuld), ught t,had better, must, have t，need, dare, used t等。本单元主要讲情态动词：be able t, dare, have t, had better, need.
1. 基本特征：(1)情态动词不能单独做谓语，后面接动词原形；(2)情态动词没有人称和数的变化（be able t，have t除外）
be able tdare＆needhave thad better
be able t d sth. = have the ability t d sth.
1.be able t 后接动词原形，表示某人能够做某事，有时态和数的变化。
2.be able t 用于过去时态时，表示 “某人过去或当时成功地做了某事”=managed t d sth/succeeded in ding。
If I wrk harder, I will be able t make greater prgress.
There was a big fire yesterday. Luckily, everyne was able t escape frm the fire .
dare nt d sth.不敢做某事 = be afraid t d sth.
1.dare 作情态动词时， 没有时态和数的变化，否定式是dare nt，主要用于否定句和疑问句中。
2.dare 用作实义动词时，后接t d，有时态和数的变化。用在肯定句中。
She dare nt g ut alne at night.
She dares t g ut alne at night.
needn’t d sth.不必做某事 = nt be necessary t d smething
1.need 作情态动词时，没有时态和数的变化，用于否定句needn’t或疑问句中。
2.need 作实义动词，有时态和数的变化；后接t d，常用于肯定句
Yu needn’t cme s early.
He needs t earn mre mney t supprt such a large family.
1.have t 有时态和数的变化，强调客观需要，意为 “不得不”否定形式是dn’t have t，相当于needn’t不必。2.must无时态和数的变化，强调主观意愿，意为 “必须”。
have t 不得不= be necessary r give strng advice t d sth.
There were n buses; we had t walk all the way hme.I must study hard fr my future because knwledge is mney
Yu dn’t have t/needn’t bring a gift if yu dn’t want t.
had better 后接动词原形，意为“最好”， 无有时态和数的变化。否定式had better nt d，构成疑问句时将had置于主语前。 had better nt d sth最好别做某事。
had better 最好= give advice t d r nt t d sth.
What had we better d? 我们最好怎么办？
She had better aplgize t Tm fr her had behaviur.
Let’s practice!
If yu 1________(dare) try a ‘painful’ diet t stay healthy, this new app is the perfect slutin—and yu 2_______(need) pay fr it! The app wrks by quickly shwing phts f different fd. All yu 3______(has) t d is select the phts f healthy fd. Then yu 4_____________(be able t) train yur brain t select healthy fd in real situatins. S, if yu’re a sugar addict and 5_________(able) t say n t chclate r cla, yu 6_____(have) better dwnlad it nw!
will be able t
aren’t able
Cmplete the passage with crrect frms
Cmplete the tips fr gd table manners with the crrect frm f the mdals in Actvity 1. (P7-3)
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: