Unit 3 第3课时 课本讲解及语法拓展-2022-2023学年八年级英语下册同步精品课堂（牛津上海版）

Electricity 牛津上海版 英语 八年级 第二学期 Unit 3 Episode 3 A：高台跳水 Using can and cannot Can you get me a packet of electricity, please? We use can and cannot (can’t) to say we are able or not able to do things. 一、Using can and cannot I can count. You cannot spell. Can they dance? Yes, he can./No, she can’t. When we use modal verbs as can and cannot with other verbs, the verbs following the modal verbs do not change their form. 3 Read what Tom and Ann say about themselves. Then say if the statements below are T (True) or F (False). I can swim, dance, play football and speak two languages. I can’t cook, play the guitar or ride a bicycle. .I can ski, dance, play chess and speak three languages. I can’t type, paint pictures or drive a car. Tom can play football. T / F Ann cannot paint pictures. T / F Tom can speak more languages than Ann. T / F Tom and Ann can both dance. T / F Ann can drive a car, but she cannot play chess. T / F Tom can swim, but he cannot play the guitar. T / F Ann can ski and type. T / F Using must and must not You must always be careful with electricity. We use must and must not (mustn’t) to tell people what to do or what not to do. I must turn it on. You must not switch it off. Must they leave? Yes, he must./No, she mustn’t. When giving a negative reply, mustn’t can be replaced with needn’t when there is no reason to do something, e.g., ― Must I take my umbrella? ― No, you needn’t. We often use signs as well as words to tell people what to do or what not to do. Work in pairs to explain these signs. S1 says the sentences to S2. S2 gives the letters of the signs. You must turn left. You must be careful. You must not smoke. You must pay ten yuan. You must not cycle. You must not turn right. You must not make a noise. You must not enter. h c f d a b e g 9 Using may and may not May I have my packet of electricity, please? Yes, you may. We use may and may not to ask for and give permission. We also use can