摘要：2．用may 比用 can 更有礼貌.
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根据汉语意思完成句子。
1.虽然我们年纪小，我们仍然能为保护环境做一些事情。
_______ we are young, we can still _______ _______ to protect the environ
ment.
2.怀特一家在扔垃圾之前总是要将它们分类。
The Whites always sort the waste before _______ _______ ______.
3.在你买新东西之前，想一想是否真的有必要。
Think whether it is really necessary before you buy _______ _______ .
4.为了节约资源，我们要爱护我们的物品以便它们能
长时间使用。
In order to save resources, we should look after our things _______ _______ they can last a long time.
5.用陶瓷杯比用纸杯好，因为它可以重复使用。
_______ _______ to use a china cup than a paper cup because it can be used again.
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_______ we are young, we can still _______ _______ to protect the environ
ment. 2.怀特一家在扔垃圾之前总是要将它们分类。
The Whites always sort the waste before _______ _______ ______.
3.在你买新东西之前，想一想是否真的有必要。
Think whether it is really necessary before you buy _______ _______ .
4.为了节约资源，我们要爱护我们的物品以便它们能
长时间使用。In order to save resources, we should look after our things _______ _______ they can last a long time.
5.用陶瓷杯比用纸杯好，因为它可以重复使用。
_______ _______ to use a china cup than a paper cup because it can be used again.
用情态动词 could, can, may, must, need 的正确形式填空。
1. —_______you answer this question in
—Sorry, I_______. _______I answer it in English?
—No, you_______. You _______answer it in Chinese.
2. —_______ I ask a question?
—Yes, you _______But you_______wait a minute.
3. —_______ I use your eraser, Bill?
—Sorry, I don't have one. Ask Mary. She_______have one.
4. —_______you help me do the shopping?
—OK, sure.
5. —_______you sweep the floor, please?
—OK, but I_______finish my homework first..
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—Sorry, I_______. _______I answer it in English?
—No, you_______. You _______answer it in Chinese.
2. —_______ I ask a question?
—Yes, you _______But you_______wait a minute.
3. —_______ I use your eraser, Bill?
—Sorry, I don't have one. Ask Mary. She_______have one.
4. —_______you help me do the shopping?
—OK, sure.
5. —_______you sweep the floor, please?
—OK, but I_______finish my homework first..
情景交际。
用may成can的适当形式完成对话。
David :Where are you going to spend your vacation this year ,Mary?
Mary :l __1__ go to Australia with my family. I'm not sure. My mother wants to go there ,but my father would like to Africa. They 2 make up their mind.
David :Will you travel by plane or by ship?
Mary :We__3 travel by ship.
David :Is it cheaper or more expensive ?
Mary : It _ 4 be cheaper ,but it takes a long time.
David : l'm sure you'll enjoy yourselves.
Mary: Don't be so sure. We__5 not go anywhere.
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David :Where are you going to spend your vacation this year ,Mary?
Mary :l __1__ go to Australia with my family. I'm not sure. My mother wants to go there ,but my father would like to Africa. They 2 make up their mind.
David :Will you travel by plane or by ship?
Mary :We__3 travel by ship.
David :Is it cheaper or more expensive ?
Mary : It _ 4 be cheaper ,but it takes a long time.
David : l'm sure you'll enjoy yourselves.
Mary: Don't be so sure. We__5 not go anywhere.