初中英语牛津版 (深圳&广州)七年级下册（2012秋审查）Unit 6 Electricity教课ppt课件

这是一份初中英语牛津版 (深圳&广州)七年级下册（2012秋审查）Unit 6 Electricity教课ppt课件，共28页。PPT课件主要包含了objective，can，cannot，speak等内容，欢迎下载使用。
T learn abut the mdal verbs can, may and must.
Have A L k
1. We can use electricity t d many things.2. ---Can yu think f an example? ---Yes, I can./ N, I cannt/can’t.3. ---May/Can I use yur mbile phne? ---Yes, yu may/can. ---N, yu may nt/can’t.4. Yu must nt/mustn’t d that, Benny.5. We must always be careful with electricity.
A can and cannt
We use can and cannt (can’t) t say we are able r nt able t d things.
①We can use electricity t d many things.②We cannt/can’t see electricity.③---Can yu think f an example? ---Yes, I can./N, I cannt/can’t.
can表示某人具备能力做某事，意为“能；会” 。
can & can’t
①I can play the pian quite well.我能把钢琴弹得相当好。②She cannt swim.她不会游泳。③— Can yu slve the math prblem? 你能做出这道数学题吗？ — Yes, I can./ N, I can’t. 是的，我能。/不，我不能。
肯定句: 主 + can + 动词原形 ……
否定句: 主 + can’t (cannt) + 动词原形 ……
一般疑问句: Can + 主 + 动词原形 …?肯定回答:Yes, 主+can.否定回答:N,主+can’t.
A Hi and L are talking abut themselves. What are they saying? Read their cnversatin and then cmplete the statements belw with can r cannt.
B may and may nt
We use may and may nt t ask fr and give permissin. In less frmal situatins, sme peple like t use can and cannt fr the same purpse.
①---May/Can I use yur mbile phne? ---Yes, yu may/can. ---N, yu may nt/can’t.②Yu may/can turn n the TV.③Yu may nt/cannt play in the kitchen.
may & may nt
①Yu may/ can turn n the TV.你可以打开电视机。②Yu may nt/ cannt play in the kitchen.你不可以在厨房玩耍。③—May I cme in? — 我能进来吗？ —Yes, yu may/ can. /N, yu may nt/ can’t. —是的，你能。/ 不，你不能。
may意为“能；可以”，表示提出委婉的请求或表示许可。can也可用来征求意见或表示许可，一般可互换，但是may比较正式，can则比较口语化。
肯定句: 主 + may/can + 动词原形 ……
否定句: 主 + may nt/ cannt + 动词原形 ……
一般疑问句: May + 主 + 动词原形 …?肯定回答:Yes, 主+may/can.否定回答:N,主+may nt/can’t.
may 较多用于一般疑问句中。
Daisy is nt feeling well tday. Benny is at hme with her. Read their cnversatin belw. Fill in the blanks with may r can.
We use must and must nt (mustn’t) t tell peple what t d r what nt t d.
C must and must nt
①Yu must nt/mustn’t d that, Benny!②We must always be careful with electricity.③They must nt/mustn’t play near the heater.
①I must phne my sister.我必须给我姐姐打个电话。②Yu must visit us while yu’re in Lndn.你在伦敦期间一定要来看我们。③Yu mustn’t tell the news t anyne else.你一定不能把这个消息告诉其他人。④Yu mustn’t drink the water frm the river.你们不能喝这河里的水。
must & mustn’t
must表示“必须做某事”或“一定要做某事”，具有强制性。
肯定句: 主 + must + 动词原形 ……
否定句: 主 + mustn’t + 动词原形 ……
Find ut the usages -- must
1.We must be careful with the fire. 2. Yu mustn’t play near the heater. 3. Must I finish all my hmewrk?4. N, yu needn’t./Yes, yu must.
观察must此时表示什么？
T tell peple what t d r what nt t d.
Daisy saw a dctr. The dctr tld her what t d and what nt t d. Help her write dwn the dctr’s instructins.
I must g t bed early.
I must take the medicine n time.
I must nt g ut alne.
I must nt share cups with thers.
Yu will be given several situatins. After reading the descriptins and lking at the pictures, decide what yu wuld say in these situatins.
a. A man is ging t see his bss. He is standing at the drway.
May I cme in?
b. A student is ging t ask the teacher a questin.
May I ask yu a questin?
c. A by is thirsty. He is asking his mther fr smething.
May I have sme water?
d. A shp assistant is serving a custmer.
May I help yu?
What d these signs mean?
（Yu mustn’t smke here.）
（Yu mustn’t climb this ladder.）
（Yu mustn’t swim here.）
（Yu mustn’t use yur mbile phne here.）
Wrk ut the rule
注: wrd 文档点击此处链接
Ⅰ. 用情态动词can/may/must或其否定形式完成句子。1. Jenny is blind, s she ________ see anything.2. — Excuse me. ________ I use yur umbrella? — Of curse. Here yu are.3. Yu _____________ play with a knife. It’s dangerus.4. Jim ________ play basketball well. It’s easyfr him.5. — ________ I return the bk t the librarytday? — Yeah. Yu see, tday is the deadline (截止日).
mustn’t/can’t
Ⅱ. 根据所给汉语提示，完成下列句子。每空一词。1. 他会唱歌和弹吉他。He ________ ________ and play the guitar.2. 明天我可以带我的朋友去那儿吗？________ ________ take my friend there tmrrw?3. 你一定不要告诉你爷爷这个坏消息。Yu ________ ________ yur grandpa the bad news.4. 这只鸟翅膀受伤了，它不能飞了。The bird hurts its wing and it _______ _______.5. 我可以看一下你的邮票集吗？____________ ___ have a lk at yur cllectin f stamps?
can sing
May/Can I
mustn’t tell
can’t fly
May/Can I
6. 每个人必须六点前完成工作。Everyne _______ _______ the wrk befre six ’clck.7. “我可以和你去吗？”“不，不可以。”“May I g with yu?” “N, yu ________ ________.”8. 十点半了，我们必须出发去火车站了。It’s ten thirty and we ________ ________ fr the train statin.
must finish
may nt
must leave
Ⅲ. 改错。将正确的句子写在横线上。1. Sam is frm the US, but he can speaking Chinese. ( )2. — Excuse me. May I sit here?( )3. — Must yu help me with my Maths, Jack? — Yes, I can. ( )4. Yu may play here. It’s against the rule. ( )___________________________________
may nt/can’t/mustn’t
Ⅳ. 翻译下列句子。1. 我们可以用太阳能发电。_______________________________________________2. 我可以借用一下你的词典(dictinary)吗？_______________________________________________3.每个人出门必须戴口罩(wear a mask)。_______________________________________________
Everyne must wear a mask when they g ut.
4. 儿童禁止在路边踢球。 ______________________________________________________5. 人们禁止在加油站(gas statin)吸烟。 _____________________________________________________6. -我必须今晚完成所有任务吗？-不，不需要______________________________________________________
We can use slar pwer t prduce electricity.
May I use yur dictinary?
Children mustn’t play ftball n the radside.
-Must I finish all the tasks tnight? –N, yu needn’t.
Peple mustn’t smke at the gas statin.