2016年秋八年级英语上 module 11 way of life unit 3 language in use（典案三教学案例课件 （新版外研版.ppt

* Module 11 Way of life Unit 3 Language in use Guess the words from this module. You use them to eat something. Example chopsticks Lead-in You use it to save your money. You use it to play. You wear it on your head. You use it to look up new words. Something for you to watch. You use it to play chess. purse toy baseball cap dictionary DVD chess set 表示主观的义务和必要, 主要用于肯定句和疑问句中, 意思为 “必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或have to, 否定回答要用needn’t或don’t have to, 意思是“不必”；must的否定形式mustn’t表示禁止，意思是“不能，不许”。 Language practice  must的用法 e.g: We must find a good method to learn computer well. —Must I finish the task right now? —Yes, you must. / Yes, you have to. (—No, you needn’t. / No, you don’t have to. ) You mustn’t come here without permission. 2) 表示肯定的猜测，常用于肯定句中，意为 “一定是, 必然……”。 e.g: Your sister must be a doctor in this hospital. ( 对现在的猜测 ) He must be reading newspapers in the reading room now.（对正在进行的猜测） It must have rained last night, for the ground is wet.（对过去的猜测） can 的用法 can的否定形式为cannot，缩写为can’t。 1) 表示能力。 I can’t swim. Can you drive？ 注意：can表示能力可和be able to互换使用，且后者有更多的时态，be able to常被用来表示can所不能表示的将来或完成的概念。 They will be able to run this machine on their own in three months. 2) 表示可能性，意思是：可以，可能。 That big cinema can seat 2,000 people. He can be very friendly at times. 3) 表示允诺，意思是：可以，能够。 You can have the book when I have finished it. Can I use your pen？ 4) 表示惊异、不相信、猜测等（用于疑问句、否定句或感叹句中），意思是：会，可能。 This can’t be true. Can it be true？ School rules 1.You _______ be late for school. 2.You _______ eat in the library. 3.You _______ ride your bike in the playground. 4.You _______ do your homework. 5.You _______ listen to the teacher. Complete the sentences with must or mustn’t. mustn’t mustn’t mustn’t must must Work in pairs. Tell each other three things you must do at home and three things you mustn’t. Are your home rules different or the same? I must visit my grandparents once a week. I mustn’t smoke. I must… I mustn’t… Have a free talk Module task Wr