(共18张PPT)
In the shop
M3U3
重点单词
chocolate
glasses
magic
noodle
worry
spider
section
panda
重点单词
Let’s have a try ……
1. _______is the national animal in our country.
A. Tiger B. Dragon C. Panda D. Bird
2. Look, there is ______ rising in the house.
A. chocolate B. smoke C. section D. noodle
Keys: C 熊猫是中国的国宝。
Keys: B 那座房子在冒烟
Try again…
就画线部分提问
Lily swims in the swimming pool.(游泳池)
________________________________________.
Superman flies in the sky.
________________________________________.
I often brush my teeth in the evening.
________________________________________.
Where does Lily swim
Where does Superman fly
When do you often brush your teeth
情态动词的基本特征
★情态动词不能单独使用,必须与其后的动词原形构成谓语。
1. You can’t walk your dog here. (can’t+walk)
2. You must finish your homework today. (must+finish)
情态动词can
Jim can swim, but I can’t
Can you swim
① 表示"能、会",指脑力或体力方面的"能力"。
例1. Jim can swim but I can't.吉姆会游泳,但我不会。
例2. I can draw but I can’t sing. 我会画画,但我不会唱歌。
② 表示"可能",常用于否定句或疑问句中,指某种可能性。
例1. Han Mei can't be in the classroom.韩梅不可能在教室里。
例2. Can he come here today, please 请问他今天能到这里来吗?
情态动词can
③ 表示"可以",常用于口语中,指许可或请求做某事。
例1. Can I have a cup of tea, please 请问我可以喝一杯茶吗?
例2. You can go out.你可以出去了?
④ 否定句型为: 主语+can not(can't/cannot)+动词原形+其它。表示"某人不能(不会、不可能)做……"。其中can't是can not的缩略式,英国多写成cannot。
例1. You cannot pass the ball like this.你不能像这样传球。
例2. I can't ride a motorbike.我不会骑摩托车。
情态动词can
【巩固练习】
1. 我们班只有Tom能做出那道数学题。 ________________________________________.2. —What _____ I do for you, sir — I’d like to buy a T-shirt. A. can B. can’t C. could D. couldn’t
Only Tom can work out the math problem in our class.A
Must I clean the house before 5:00
Yes, you ____ must_____.
情态动词must
① 表示“必须”,此时可用于肯定句或疑问句。
例1. You must finish your homework before I come back.
例2. You must obey traffic rules when you cross the street.
② 用情态动词must提问,肯定回答用must;否定回答用needn’t。
例1. --Must I return the book today --Yes, you must. / --No, you needn’t
例2. --Must I hand in my homework today --Yes, You must. / -- No, you needn’t.
情态动词must
③ 用于否定句时,mustn’t的意思是“一定不要、不能”,而不表示“不必”
例1. You mustn’t walk your dog on the grass.
你不能在草坪上遛狗。
例2. You mustn’t smoke in public places.
你不可以在公共场合吸烟。
情态动词must
【巩固练习】
1. Must I clean the house before 5:00 Yes, you _________. / No, you _________.
must/needn’t
情态动词should
We should help the old people.
① should表示义务或责任时意为“应该”: 例1. We should learn from each other. 我们应该互相帮助。 例2. We should help the aged. 我们应该帮助老人。
② should的否定形式:shouldn’t不应该例1. Students shouldn’t spend too much time playing computer games. 学生们不应当花太多的时间玩计算机游戏。
情态动词should
巩固练习
1.--Could I borrow your book --Of course you ____________. A. can B. must C. should D. will 2. --Mary,__________you speak Chinese --Yes,only a little. A. Must B. Need C. May D. Can 3. Can I _______ your telephone A. to use B. using C. use 4. We________eat too much candy. It is too sweet. A. can B. may C. can't 5. Henry's father is a doctor. He be a fireman. A. must B. can C. can't
Keys: A D C C C
总结
情态动词
can是能力和不能,
must必须和禁止,
should表义务和责任
Thank you~