2020-2021学年牛津深圳版英语七年级下册Unit 6 Electricity 知识点梳理课件

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learn it every weekend.
—He is a hard-working boy.
A.mustn’t
B.may not
C.can’t
D.needn’t
II.根据句意,用 can, can’t, may, may not, must, mustn’t, needn’t
完成句子或对话。
Protecting natural resources means protecting our Earth. Let’s protect natural resources together.
六、语法归纳 情态动词的用法
情态动词本身有一定的词义,但也同助动词一样,需要与其 他词一起构成句子的谓语,另外情态动词没有人称和数的变化, 情态动词后必须跟动词原形。
Unit 6 Electricity
【单元知识点归纳】 一、重点单词 1.conversation:talk 谈话 n. 2.electricity 电 n. (electric adj.电的,用电的,发电的;electrical
adj. 有关电的,用电的。electrical 常与 equipment,appliance 等搭配)
5.The chemicals inside batteries produce electricity. 电池里的化学物质生产电。
6.Electricity makes our lives easier. 电让我们的生活变得更容易。
7.What do you know about electricity? How can we use them safely? 关于电你知道什么? 我们能怎么去安全地使用它们呢?
6.reply to:answer 回答 7.power station:a place to produce electricity 发电站 8.flow through:to move in one direction 流动 9.a moment later:after a while 一会儿以后 10.tidy up:make sth. neat and tidy 整理好
6.— Dad, may I watch TV?
—No, you ccaann’’tt . You
mmuustst
finish your
homn, don’t play with the knife. You mamyay hurt
yourself. —I am sorry, Mom. I won’t play with it again.
8.Don’t put your hand in the washing machine when it is on. 当洗衣机在工作的时候,不要把你的手放进去。
9.Before you put an object in a microwave, make sure it is microwave safe. 在你把一个物体放进微波炉时,确保它适用于微波炉。
7.moment:a very short period of time 瞬间,片刻 n. 8.battery:a device that is placed inside and that produces the
electricity that makes it work 电池 n. 9.cooker:a machine used to cook food 炉具 n. 10.fridge:a electric machine in which food is kept cold so as to
3.must 的用法 (1)must 表示主观看法,意为 “必须;一定”。如: Must I hand in my homework right now? 我现在必须交作业吗?
(2)对 must 引导的疑问句,肯定回答为 must,否定回答为 don’t have to 或 needn’t。如: —Must I finish my homework now? 我现在必须完成作业吗? —No, you don’t have to / needn’t. 不,你没有必要现在完成作业。
—I’m sorry.Children ___________ swim alone. A.Must; can’t B.May; can C.Can; mustn’t D.Can; needn’t
( CC )5.—Tom ___________ play tennis well, so he tries to
3.rule:a statement of what must or must not be done in a particular situation 规则 n.
4.anyone:anybody, any people 任何人 pron. 5.reply:to say or write as an answer to sb./sth. 回答 v. 6.connect:join, link 使连接 v.
三、重点短语 1.in a way:to a certain degree 在某种程度上 2.switch off:turn off 关掉 3.produce electricity:make electricity 生产电 4.a packet of:a small bag of 一袋 5.be connected to:be linked to 被连接到……
11.rice cooker:电饭煲(cook v.做饭;n.厨师 cooker 炉具) 12.washing machine 洗衣机 13.solar power 太阳能 14.water power 水能 15.wind power 风能
16.take the medicine on time 准时吃药 17.electrical appliance 用电设备 18.make sure:to do sth. in order to be certain that sth. else
( BB )3.—___________ I visit Lucy on Sunday, Mum?
—Yes, you ___________.
A.Must; can
B.May; may
C.Can; needn’t D.May; can’t
( CC )4.—___________ I swim here?
stay fresh 冰箱 n.
11.lock:to fasten something, usually with a key, so that other people can’t open it 锁上 v.
12.test:take an exam 测试 v. 13.tidy:make sth. in order 使整洁,使整齐 v. 14.touch:put your hands or fingers onto sb./sth. 触摸,碰 v.
(3)表示推测时,意为 “可能”,常用于否定句和疑问句中, 此时 can’t 译为 “不可能”。如: —Can he tell a lie? 他可能说谎吗? —No, he can’t. 不,他不可能。
2.may 的用法 (1)表示请求、许可,比 can 委婉。如:May I leave a message? 我可以留个言吗? (2)表示推测,谈论可能性,意为 “可能,或许” ,一般用于 肯定句中。如: She may be in the library. 她可能在图书馆。
happens 确保
四、重点句子 1.She can’t buy electricity in packets like sweets! She’ll look
foolish. 她不能像买糖果一样用袋的形式买电!她会看起来愚蠢的。
2.Electricity gives us power. It flows through wires. It’s like water, in a way. 电给我们能量。它通过电线流动。在某种程度上,它像水一样。
1.can 的用法:表示能力、许可、可能性。 (1)表示能力时,一般译为 “能、会”,即有某种能力,尤其是
生来具备的能力,此时 may 和 must 均不可代替它。如: He can dance, but I can’t. 他会跳舞,但我不能。
(2)表示许可时,常用于口语中。如: You can come to my home. 你可以来我家。
Second, we should save paper. Most of paper is made from trees. We should try to use less paper in our lives. We can also use second-hand books if they can be used by us. Third, in our lives, we should try to produce less rubbish. We can use many of things in our lives again.
3.Electricity comes into our flat through thin wires. These are connected to cables under the street. 电通过细电线来到我们公寓,这些与街道下面的电缆相连接。
4.Could anyone live in a world without electricity? 有谁能生活在一个没有电的世界里吗?
五、范文背诵(如何保护自然资源) How to protect natural resources
There are some ways to protect natural resources. First, we should try to save water and electricity in our lives. There are many ways. For example, when we don’t use water, we should turn the tap off. When there are no people in rooms, we should turn all the lights off.
6.electrical (名词) eleelcetcrtirciictiyty 7.reply(过去式) rerpeplileided 8.fool (形容词) fofoolilsihsh 9.connect(形容词) coconnnecetcetded 10.lock (现在分词) lolcokciknigng
二、单词变形
1.converse(名词) ccoonnvveerrssaattiioonn
2.ruler (动词) rule
rule
3.battery(复数) babtattetreireises 4.touch (形容词) toutocuhcehde/ dto/ utocuhcinhging
5.cooker(指人的名词) cocookok
not very sure. A.may
B.can
C.need
D.must
( BB )2.—___________ I finish the work today?
—No, you ___________.
A.Must; can
B.Must; needn’t
C.Must; need D.Can; mustn’t
(3)must 表示肯定的推测,一般用于肯定句中。如: He must be in his office now. 他现在一定在自己的办公室。
【小试牛刀】
I. 根据句意,选择正确选项。
( AA )1.—When will John come to our house?
—He ___________ come here this afternoon. I am
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