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师梦圆高中英语教材同步译林版模块四 Module IV Modern lifeGrammar and usage(1): Modal verbs: general introduction下载详情
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《Grammar and usage(1): Modal verbs: general introduction》精品教案优质课下载

Step 1 Greeting

Step 2 Presentation

一、情态动态的定义:可以用来表明说话人对某一动作或状态的情感和态度

二、基本用法:后跟上省略to的动词原形/ have done

1. Tom must finish the job on time, this is an order.

2. You can use the car, if you want.

3. He might have given you more help, even though he was busy.

三、区别几组情态动词

一、can和could

表示能力。can表示现在的能力,could表示过去具有某种能力。如:

My brother can speak four foreign languages.

Sophia could read when she was four years old.

注意:can表示“能够”时,与be able to同义,但can只有过去式could,而be able to可用于各种时态。

表示许可。could比can表示的说话语气更委婉。如:

You can have a piece of cake after you’ve eaten your vegetables!

Could I have a drink of water, please?

表示可能性。此时could不是can的过去式,它表示推测的可能性比can小。如:

Can he still be alive after all this time??

If you’re not careful, you could get into even worse trouble.

二、may和might

表示许可或征求对方许可。如:

You may / might use my bicycle so long as you return it before 12:00.

I can’t eat; may / might I have a little milk?

☆表示可能性。might比may语气更不确定,表示的可能性更小。如:

He may / might get here in time, but I can’t be sure.

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