英语情态动词用法导学案
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情态动词讲解
一．概念引入
情态动词表示一种情感和态度，是___________________(实义动词or 助动词)，它本身语义不完整，要和实义动词一起使用，后接动词的____________形式。
注：实义动词即行为动词，表示动作的动词，可单独使用做谓语。与实义动词相对应的是非实义动词，包括（帮助构成时态、语态的）be动词，（帮助构成时态、强调、虚拟的）助动词（do / does / did, have / has / had）以及情态动词。
eg. I did a lot of homework today, and I felt satisfied.
People do love to have holidays for various reasons.
情态动词有__________________________________________________________
_______________________________________。
二．基础讲解
can / could
1. 表示_______________.
eg. My grandma is 80 years old, but she can drive without glasses.
2. 表示________________, could 可以代替can, 表示语气较为委婉。
eg. They asked whether they could smoke in the hall.
Could you please pick me up at the airport at 5 p.m. next Monday?
3. 表示推测或理论上的可能性，意为_________________.
eg. I thought the story could not be true.
Even an experience teacher can make mistakes.
may / might
1. 表示_______________, 它的否定形式可以用may not，但表示“强烈禁止”等意思时常用_______________.
eg. May I turn up the radio a little?
He said that I might use his telephone.
2. 表示______________的推测, might 比may 的语气更弱。
e g. Our football team didn’t p lay well today, but we might do better tomorrow.
3. 表示_____________.
eg. May you succeed! / May you live a happy life.
will / would
1. 表示_________________.
eg. I have told him to stop smoking many times, but he will not listen.
2. 表示询问意愿或提出请求。
eg. Will you give him a message when you see him?
Would you like to join the football club?
3. 表示___________的动作，意为_______________; will表示现在，would表示过去。eg. She will sit for hours reading in the afternoon.
We would sit around grandpa after supper, listening to his stories when we were young.
4. 表示________________________________.
eg. Wood will float on the water.
The door won’t open.
注：would vs used to
would和used to都可表示____________的习惯性动作，但used to暗含现在已不这样。eg. People _________________ to believe that the earth was flat.
shall / should / ought to
1. shall 用于第一和第三人称的疑问句，表示征求对方意见或许可。
eg. 我们能否将运动会推迟到下月。
__________ __________ __________ __________ __________ ____________ ___________ until next month?
2. shall 用于第二和第三人称的陈述句，表示_________、_________、_________等。Eg. You shall be punished if you break the rule.
You shall pay more attention to your behaviors next time.
You shall get a gift if you do well in your exams.
3. should 表示劝告和建议，作“应该”讲，和ought to相似，ought to语气更重。eg. 我认为孩子应该好好尊敬长辈。
I think _________ __________ really _________ ________ _________ _________ __________.
注：ought_______(有/无) 形式的变化，其否定式为___________________，疑问式将____________ 提至主语之前。
eg. ---Ought he to see the doctor?
---Yes, he _________________.
4. should 表示诧异，意为_______________.
Eg. It’s strange that she should do such a thing.
It was so moving that they, so poor themselves, should bring me food.
must / have to
1. must 表示___________, _____________, 在回答must 问句时，否定式常用_____________, _____________________ 表示“不必”，因为mustn’t 表示____________________.
Eg. Must I have a driver’s license if I want to drive a car?
---Must I be home before eight o’clock, Mum?
---No, you __________________________________.