牛津深圳版英语七下Unit 6《Electricity》（Grammar）课件（共44张PPT）

课件44张PPT。Unit 6《Electricity》Grammar can may must情态动词： can may must定义：
本身具有一定的词义，表示某种感情和语气。
例句：
You can’t do it like that.(责备)
May I borrow your book?(请求)
You must finsh your homework on time.(命令)
can观察：
I can swim. Can you swim?
I can't /cannot swim, but I can ski.
总结:
1.can表示__________.
2.can 后面动词用________.
3. can的否定形式是：_______或________.
4. 一般疑问句是将can_______.有能力做某事原形can'tcannot提前Hi and Lo are talking about themselves. What are they saying? Read their conversation and then complete the statements below with
Can or Cannot. P771. 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.cancancancancannotcannotcannotcannotLet's play a chin game.(接龙)A: I can swim. Can you swim?
B: Yes, I can. I can sing. Can you sing?
C: No. I can't. I can ride a bike. Can you ride a bike?
D: ....
can/may观察：
总结：
1：can/may表示：____和_____.后接:_______
2: can的否定形式:____________
may 的否定形式：________May/Can I use your mobile phone？
Yes, you may/can.
No, you may not/can't.You may/can turn on the TV.
You may not/cannot play in the kitchen. 请求允许原形can't/cannotmay notDaisy is not feeling well today. Benny is at home with her. Read their conversation below. Fill the blanks with may or can. P78Benny: Yes. I ____. _____ I carry your bag for you?
Daisy: Yes, you may. That’s so kind of you,
Benny. I’m ready to go. _____ you open the door for me?
Benny: Yes, I can.
Daisy: Thanks. MaycanCanBenny: How are you feeling, Daisy?
Daisy: Not very well.
Benny: ____________ I get you a chair?
Daisy: Yes, thanks.
Benny: I’m going out. _____ I borrow your bicycle, Daisy?Daisy: Yes, you may. Before you go to meet your friends, can you come and see the doctor with me?MayMay/Can A man is going to see his boss.
He is standing at the doorway. May I come in?What would he say if he wants to be polite?bossCome in, please.A student is going to ask the teacher a question.May I ask you a question?teacherSure.c. A boy is thirsty.
He is asking his mother for something.May I have a glass of water?his mother
Here you are.You enter a shop. The girl will say...May I help you?I'd like to buy some...Youmust and must not观察：
总结：
1. must表示______和_______.后接：______
2. Must 提问，肯定回答：仍用______回答
否定回答：用____________或_________
1.We must listen to Miss Li carefully.
2. You must not/ mustn’t be late for class.
3. Must I clean the blackboard now?
Yes, you must.
No, you needn't. No, you don't have to.命令禁止原形must you needn'tyou don't have toDaisy saw a doctor. The doctor told her what to do and what not to do. Help her write down the doctor’s instructions. drink more water go to bed early
eat cold food share cups with others
go out alone take the medicine on timeI must drink more water.
______________________________
______________________________
I must not _____________________
______________________________
______________________________I must go to bed early.I must take the medicine on time.eat cold food.I must not go out alone.I must not share cups with others.小结：can/may/must 共同点：
1.__________________________________
2.__________________________________
3.__________________________________
不同之处：
1. can表示_________
may表示：________
must 表示：__________
2. can/may 提问遵循：_________
must 提问,否定回答：_________________后面动词都用原形。否定句都是后面加not一般疑问句都是将其提前有能力做某事/请求、允许请求/允许命令、禁止什么问，什么答needn't/don't have to我会游泳但玛丽不会。
I _____ _____ but Mary _______.
2. 我八点之前必须完成作业。
I _____ _____ my homework before eight o’clock.
3. 我可以借用你的自行车吗？
_____ ___ borrow ?
4. 你不可以在这里打篮球。
You ________ _____ _________ here.
5. -Must I stay here now?
-____, you _______. You _______ leave now.can swim can't must finishMay I mustn’t play basketballI.根据中文意思完成句子。ExercisesNo needn't may/can
AB can may mustcan/may/must的双面性观察：
1. He may be Tom. Because he looks as tall as Tom.
But I am not sure.
2. -Can the story be true?
-It can't be true. He lied.
3. He must be at home. Look! The lights are on.
总结：
1.can/may/must还可以用来表示_________.
2.可能性由大到小的排序：________________.
3. must表示一定，其“不可能”是：__________
4. 表示可能时，________不用于肯定句。推测 must---may/can can't can May he be Zhou Jielun?
It ________ be Zhou jielun.
It _______ be Jacky Cheng .duang!can't must Can she be Miss Li?
She_____ be Miss Li.
Who must she be?
She_____ be Angela Baby.can't must Who may she be?
Can she be Zhou Xun?How much do you know about your classmates?There are some things.
Do you know whose it is?情景剧A: I can play basketball.
Can/May I play basketball here?
B: No, you can't/ may not.
You mustn't play basketball in the cLassroom.
You may hurt the classmates.
You can/must play it on the playground.
a basketball fan monitor(班长)a classmateat night
in the KTVon the wall
on the paperat school.
outside the schoolA: I can ___________.
Can/May I ________________?
B: No, you can't/ may not.
You mustn't _________________________.
_________ may /must__________________
You must /may_____________________________.【中考演练】
(1) —May I change the film here? (广州.2013)
—No, you___do that in the sunshine.
A. needn’t B. don’t have to
C. can’t D. may not
(2) ---Listen! Somebody is singing in the next room. Who ____ it be? Is it Meihua?(深圳)
---No. It ____ be her. She is at school now.
A. will, may not B. must, mustn’t
C. may, can’t D. may, won’t
(3) ---- ___ I take the newspaper away?
----No, you mustn't. You____read it only here.(惠州.2011) A. Must; can B. May; can
C. Need; must D. Must; must
(4) You___ go and see a doctor at once because you‘ve got a fever.(上海)A. can B. must C. may D. could1. --May I watch TV, Dad?
--No, you _____. You must finish your
homework first.
A. mustn’t B. may not
C. couldn’t D. might not
2. -- _____ you carry the bag by yourself?
--Yes, I can.
A. Must B. Can C. Should D. May
3. You _____ throw rubbish everywhere.
A. mustn’t B. can’t
C. may not D. couldn’t II.单项选择。ABA4. -- _____ I borrow these magazines?
-- Sorry, only the magazines over there can be
borrowed.
A. Need B. would C. Must D. May
5. It’s the library! So you _____ not shout here.
A. must B. can C. should D. may
6. Many people like Jay Chou because he
_____ write and sing popular songs.
A. must B. can C. should D. mayDAB Use the following sentence “I can …” to tell
others your special ability.
For example:
I can hold my breath for two minutes.
……You will be given several situations. After reading the descriptions and looking at the pictures, decide what you would say in these situations.What do these signs mean?（You mustn’t smoke here.）（You mustn’t climb this ladder.）（You mustn’t swim here.）（You mustn’t use your mobile phone
here.） may 表示许可或请求对方允许，意为 “可
以；可能；或许”；
否定形式为may not, 意为“不可以”。除了
may not 以外, can’t、 mustn’t 都可以表
示“不可以”。 但mustn’t 语气更强。
may 构成的一般疑问句的回答形式为：
— May I...?
—Yes, you may./ No, you may not.may be 和 maybe 的区別:
may be 是 “情态动词+系动词be”结构，表示“可能是”,
maybe作副词；表示 “大概；也许”。
例如：He may be in the room. / Maybe he is in the room.◆can/cannot are words to show our abilitiescan
① be able to 能，能力
e.g. 我可以唱一首英语歌曲。
I can/am able to sing an English song.
② 过去式：could
e.g. 我十年前就能做到那样。
I could do that 10 years ago.
③否定式： cannot = can’t can
—用于一般现在（can）、
一般过去时态（could）。
be able to
—用于一般现在（am able to）、
一般过去时态（was/were able to）、
一般将来时态 （will be able to）。◆拓展 （can与 be able to 的区别）
①must be
——“肯定推测”
e.g. --- What is Tom?
--- He must be a student.
② “否定推测”
——can’t be
e.g. --- Where is Tom?
--- He can’t be in the library.◆ 拓展 (推测,可能)· He is in the classroom. 100%
· must ﹥99% (must表推测，用于肯定句)
e.g. He must be in the classroom.
他肯定在教室。
· may 50% (may表推测，用于肯定句)
e.g. He may be in the classroom.
他可能在教室。
· can’t / couldn’t (can/could表推测用于否定句)
e.g. He can’t be in the classroom.
他不可能在教室。用本单元所学的情态动词填空。
1. — Kate, you have won the English competition!
— Oh, it ____ be true. I made a lot of mistakes in it.
2. You ________ talk to your grandparents like that. It’s impolite.
3. We ____ wash our hands before meals. It is good for our health.can’tmustn’tmust4. Excuse me, ____ you tell me the way to the nearest park?
5. You ________ go with us to the zoo if you want to.
6. I ____ speak Chinese very well, but I ____ speak French at all.can can / maycancan’t翻译下列句子。
1. 门锁了。他不可能在家。
The door is locked. He _____ be at home.
2. 我的手表停了。肯定有毛病。
My watch doesn’t work. There _____ be something wrong with it.
3. — 我可以借用你的尺子吗？
— 当然可以。但是你必须明天还给我。
— ____ I borrow your ruler?
— Of course. But you _____ return it to me
tomorrow.can’tmust Maymust单项选择。( )1. ____ you help me with this maths problem?
I ____ not work it out.
A. Can; may B. Must; must
C. Can; can D. May; may
( )2. The boy ____ run very fast. He wants to be a top runner as Liu Xiang in the future.
A. can B. can’t C. may D. may notCA( )3. — May I go to the cinema, Mum?
— Certainly. But you ____ be back by 11 o’clock.
A. can B. may C. must D. need
( )4. — Must I finish the work before five o’clock?
— No, you ____.
A. mustn’t B. needn’t
C. may not D. can’t
( )5. You ____ talk here. It is against the rules.
A. mustn’t B. must C. may not D. canCBA情态动词may 的用法：表示允许。may在表达这
个意思时可以与can 互换使用。由may 引起的一
般疑问句，其否定回答用______， ______ 或
______ 。
表示请求时，could 和can 不表示时态的区别，
只是could的语气更加委婉。may notcan’t / cannotmustn’t