Unit 1 Food for thought Using language ppt课件-（2019）新外研版高中英语高一上学期必修第二册.pptx

1、Unit 1 Food for thought Section B Using languagediet 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 T

2、V 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.playingin case 意思：_【归纳拓展】in case of sth.要是, 在的时候（尤用于官方告示）in a

3、ny 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 different

4、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 Please find out all the sentences with modals in the passage A Child of Two Cuisines and analyze the function of them.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

5、；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，还可表示过去时态时，还可表示“某人过去或当时成功地做了某事某人过去或当时成功地做了某事”。I will be able to speak German in another two months.【用法辨析】【用法辨

6、析】can与与be able to（1）can与与be able to都表示能力，在许多情况下可以交替使用。都表示能力，在许多情况下可以交替使用。但但can只有现在式和过去式（只有现在式和过去式（could），而），而be able to则有更多的形式。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，一般要用要用will be able to（3）be able to的过去式的过去式was/were able to在肯定句中可表示过去设在肯定句中可表示过去设法做成了某事，相当于法做成了某事，相当于managed to

7、do，而，而could则无此意义。则无此意义。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 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 t

8、o的否定形式dont have to表示“不必”，可用于各种时态中。have tomust强调客观需要强调客观需要强调主观看法有多种时态形式有多种时态形式只有一种形式否定形式表示否定形式表示“不必不必”否定形式表示“禁止”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 n e e d 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：参考答案：a-2 b-5 c-1 d-4 e-3a .

9、 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 suffer from heat i

10、nside 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 something1-b 2-e 3-d 4-c 5-aUnderline the modals in t

11、he 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 better: give advice to do somet

12、hinghave to dare not had betterneednt be able to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, FranceExercise 4:1c 2a 3-d 4-bshinylargeroundpinktinyfresh可补充：可补充：transparentburntbrightcolourfulthickfishy可补充：stinkyfragrantpu

13、ngentsmokyspicybittersweetfruity可补充：sourhottastywsaltytendersoftjuicycoldstickysmoothcreamy可补充：greasycrispyhardchewyTalk 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.