Unit 1 Food for thought Using language 课件- 高一上学期英语外研版（2019）必修第二册.pptx

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1、Unit 1 Food for thought,Section B Using language,diet 词性：_ 意思：_词性：_ 意思：_a healthy/balanced/poor diet健康的/均衡的/糟糕的饮食be on a diet在节食（表示状态）go on a diet开始节食（表示动作）follow a diet按照规定饮食stick to a diet坚持某一种饮食 练习：Have you been _ a diet? You have lost a lot of weight.,on,addict 词性：_ 意思：_a video game addict电子游戏迷a

2、 TV addict电视迷a shopping addict购物狂【单词积累】addicted adj.（人）上瘾的；对着迷的addictive adj.（药物等）使人上瘾的；使人入迷的addiction n.瘾；入迷，嗜好be/become/get addicted to对上瘾；沉迷于（to是介词） 练习：What he is worried about is that his son has been addicted to _ (play) computer games.,playing,in case 意思：_【归纳拓展】in case of sth.要是, 在的时候（尤用于官方告示）

3、in any case无论如何，不管怎样in this/that case既然这样/那样；如果这样/那样的话in no case决不（位于句首时，句子用部分倒装）as is often the case（with）（对）是常有的事练习：Take an umbrella with you, in case it _ (rain).,rains/ should rain,differ 词性：_ 意思：_词性：_ 意思：_搭配：differ in在方面不同differ from与不同differ with sb.about/on/over sth.与某人在某事上持不同意见【归纳拓展】be diffe

4、rent from与不同be different in在方面不同 练习：Leaves are found on all kinds of trees, but they differ greatly _ size and shape.,to pick,Using language,Pre-class,Leading in,Please find out all the sentences with modals in the passage A Child of Two Cuisines and analyze the function of them.,.I was able to hold

5、 a knife and forkand chopsticks!But there are still some dishes that Dad dare not try even after many years of marriage to my mother. Mum and I just have to find a way to get him into the kitchen!wed better not eat too much roast food as it may make us suffer from heat inside our bodies, You neednt

6、try it if you dont want to, Mum said,.,While-class 情态动词,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 to，have to除外）；有些情态动词有过去式，如：can-could，may-might，will-would，dare-dared，have to-had to等。,1. be able to be able to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

7、事”。I will be able to speak German in another two months.【用法辨析】can与be able to（1）can与be able to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（could），而be able to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 to（3）be able to的过去式was/were able to在肯定句中可表示过去设法做成了某事，相当于managed to do，而could则无此意义。,2. dare dare意为“胆敢，敢

8、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 not/darent, 多用于否定句或疑问句。I am so afraid that I dare not move.我害怕得不敢动。（2）dare作实义动词时，有时态、人称和数的变化，后接带to的不定式，否定式要在其前加dont/doesnt/didnto不定武符号to有时可以省略。,3. have to have to表示“必须，不得不”，是由于客观情况而必须，have to的否定形式dont have to表示“不必”，可用于各种时态中。,4 had

9、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 no。had better do sth.最好做某事had better not do sth.最好不要做某事,5 need need意为“需要，有必要”，既可作情态动词，又可作实义动词。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 not/neednt，意为“不必”。neednt have done表示实际上做了本来不必做的事，意为“本来不必”。,参考答案：a-2 b-5 c-1 d-4 e-3,

10、Activity 1,a . I was able to hold a knife and fork -and chopsticks!b But there are still some dishes that Dad dare not try even after many years of marriage to my mother.c . Mum and I just have to find a way to get him into the kitchen!d .wed better not eat too much roast food as it may make us suff

11、er from heat inside our bodies,e You neednt try it if you dont want to, Mum said,1 be afraid to do something2 not be necessary to do something3 give advice to do or not to do something4 be necessary or give strong advice to do something5 have the ability to do something,1-b 2-e 3-d 4-c 5-a,Activity

12、2,Underline the modals in the introduction to an app and talk about their meanings.,dare not: be afraid to do somethingneednt: not be necessary to do somethinghave to: be necessary to do something be able to: have the ability to do somethingarent able to: dont have the ability to do somethinghad bet

13、ter: give advice to do something,Activity 3,have to,dare not,had better,neednt,be able to,Activity 4,口1 Backyard BBQ, Kansas City, US口2 Bund 59, Shanghai, China口3 Antonios Pizzeria, London, UK口4 Madame Laurents Bakery, Paris, France,Exercise 4:1c 2a 3-d 4-b,After-class,小组讨论!,Underline the words that

14、 describe food in Activity 4 and put them into the table. Add any more you can think of.,Work in pairs. Talk about your favourite food using the words you have learnt.A: Whats your favourite food?B: My favourite food is.A: How does it look /smell /taste /feel?B: It looks /smells /tastes /feels.,Thank you,