Unit 6 Electricity 第3课时 Grammar 课件 2022-2023学年沪教牛津版七年级下册英语

Unit 6 Electricity Period 3 Grammar 牛津深圳·广州版 七年级下册 Master three groups of modal verbs: can & cannot; may & may not; must & must not Learn how to use modal verbs correctly. Use modal verbs to express how to use electrical appliance safely. Learning objects Do you remember us? We have learnt how you humans produce electricity. Today, we will introduce our power station to you! Lead in Lead in We are Monsters, Incorporated. We can power your life. We can power your car. We can warm your home. We can light your city. In order to have a better tomorrow, we must work hard. We should carefully match every child to their ideal monster to produce the best scream. The scream can be refined into clean and dependable energy. Read the introduction and pay more attention to the red words. Lead in can, must, should What are these words? 5 A can and cannot We use can and cannot (can't) to say we are able or unable to do something. Presentation Modal verbs 都可表示能力,意思是“能,会”,can的否定形式是can’t (cannot),意思是“不能,不会”。在过去时态中则对应用could和couldn’t。如: can 和 be able to的区别： I can fly a kite. / I can’t fly a kite. When I was six, I could swim. / When I was six, I couldn’t swim. be able to可以用于各种时态，并有人称和数的变化；can只有现在和过去两时态。 Can and Can’t Presentation 可以用来表示请求许可,意思是“能,可以”。此时can 一般用于平辈、熟人之间;could语气较为委婉客气,一般用于向老师、父母和长辈请求许可。 注意:这种用法中,答句都用can的适当形式。 --- Could I watch TV now, Dad? --- No, you can’t. You must finish your homework first. Presentation 表示许可、允许,意为“可以”。 You can't play computer games on weekdays. We were totally free. We could do what we wanted. can't 还可表示否定推测,意为“不可能”。 It can't be true. 它不可能是真的。 Presentation Hi and Lo are talking about themselves. What are they saying? Read their conversation and then complete the statements below with can or cannot. Have a go 1. Hi _____ play football. 2. Lo ________ paint. 3. Hi ________ speak as many languages as Lo. 4. Both Hi and Lo _____ dance. 5. Lo ________ drive a car, but he _____ play chess. 6. Hi _____ swim, but he ________ play the guitar. can can