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课件网) Unit 6 Electricity Module 3 Natural elements Grammar: can/cannot(can’t) must/mustn’t 英语 七年级下册 沪教牛津版 Learning Objectives （学习目标） At the end of this class, I will be able to: 1. use can/can’t and must/mustn’t; 2. talk about electricity according to the mind map(思维导图). e-mail lights e-books computer telephone refrigerator iron ceiling fan ice-maker television yogurt maker If you want to use them, you need（ ）. electricity With electricity, I can ... I can watch TV. I can use bulbs to light up the house. I can cook rice with a rice cooker. With electricity, I can... With electricity, I can: _____ _____ _____ Without electricity, I can’t: _____ _____ _____ To save electricity, I must: _____ _____ _____ To save electricity, I mustn’t: _____ _____ _____ _____ Please write down at least 2 things you can do with electricity. I can use a fridge to keep food fresh or refrigerate food. I can wash or dry clothes with a washing machine. I can cool or heat the air by using an air conditioner. With electricity, I can... I can use a fridge to keep food fresh or refrigerate food. I can wash or dry clothes with a washing machine. I can cool or heat the air by using an air conditioner. I can watch TV. I can use bulbs to light up the house. I can cook rice with a rice cooker. You You You You You You She She She She She She We We We We We We With electricity, sb. can... Without electricity, I cannot/can’t ... I cannot/can’t watch TV. I cannot/can’t use bulbs to light up the house. I cannot/can’t cook rice with a rice cooker. We We We You You You She She She Summary can/cannot(can’t) Rule 1: They don’t change with the subject. Modal verb 情态动词 Rule 2: Verbs behind them should be in their base forms. Meaning: 可以；能够/不可以；不能够 With electricity, I cannot/can’t... With electricity, I can: _____ _____ _____ Without electricity, I can’t: _____ _____ _____ To save electricity, I must: _____ _____ _____ To save electricity, I mustn’t: _____ _____ _____ _____ Please write down at least 2 things you can’t do without electricity. Summary can/cannot(can’t) Rule 1: They don’t change with the subject. Modal verb 情态动词 Rule 2: Verbs behind them should be in their base forms. must/mustn’t Follow Rule 1 and Rule 2. Meaning: 可以；能够/不可以；不能够 With electricity, we ____ do many things. Our lives are _____. Without electricity, we ____ do a lot of things. Our lives are _____. But... convenient can can’t inconvenient People waste electricity! What’s the problem With electricity, I can: _____ _____ _____ Without electricity, I can’t: _____ _____ _____ To save electricity, I must: _____ _____ _____ To save electricity, I mustn’t: _____ _____ _____ _____ But people waste electricity. We must start to save electricity! To save electricity, I must or mustn’t... I must unplug（拔下......的电源） the washing machine when I am not using it. I mustn’t leave my comput ... ...
