Grammar and usage(2): Modal verbs: comparisons优秀公开课教案

Module 4 Unit 2 Grammar and Usage Modal verbs: general introduction

Modal verbs 情态动词

表示推测

Can(能)；may（可能）；could（可能）；might （可能）；must（一定）；should（应该）；ought to（应该）；will/would（会）

表示义must（必须）；have to（不得不）；should（应该）；ought to（应务，责任，该）；need（有必要）；needn't（没有必要）；don't have to（不必）；必要

had better（最好）

表示能力

can（能够）；could（能够，过去时）；

be able to（能够）

表示请Can I...?; May I...?; Could I...?;（委婉形式）；Might I...?（委婉形求，许可，式）；Will you...?; Would you please...?; Shall I...?;

禁止

Can't（不可以）；may not（不许）；mustn't（禁止）

表示习惯used to do（过去的习惯行为）；would（过去常常）；will（常常）

和倾向

表示意志

will（第一人称，“愿意”）；shall（二、三人称，表命令、允许、强烈的意愿）；dare（敢）

情态动词should (not) have done; ought (not) to have done; +have could have done; can have done;

done may have done; might have done;

needn't have done;

would have done;

must have done Exercise :Try to finish the sentences and figure out the grammar rules. 1.

(1) A computer ______think for itself; it must (必须)be told what to do.

(2) There is someone outside. Who can it be?

译：_____________________。

(3) ---Could you tell me the way to the post office, please?

---Yes, I can/may.

(4) Can hard work change a person that much?

译：________________________。

(5) He could have given a better speech, but he was too nervous.

Mike can’t/couldn't have found his car, for he came to work by bus this morning.

can和could用法小结：

_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 2.（1）---May I leave now?

---Yes, you _________

(No, you _________.)

(2) I was afraid that you might not like grammar.

译：_______________________。

(3) He said he wouldn't change his mind ______________ they might say.

(4) _______ all your dreams come true.

祝你心想事成。

** 翻译：他到现在还没出现，可能是生病了。

________________________________________________。

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may和might 的用法小结：

_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 3. (1)---Must we hand in our English exercise books?

--- Yes, _________.

No, ________________/______________.

(2) She´s wearing a diamond necklace. She must have a lot of money. 译：_______________。

（3) It _______________ last night because it was wet in the street. （昨晚肯定下雨了）

（4）Mary have sunken eyes. She ________________ well last night. （昨晚肯定没睡好）

Must的用法小结：

_______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 4. (1) --- Need I finish the work toady?

--- Yes, you _______. / No, you __________.

(2) You _________________ her the news, for I had told her earlier. （没有必要做...）

(3) My son is not at home, but I dare say he will come back before long.

译：___________________________________。

need和dare的用法小结：

_______________________________________________________________________________ _______________________________________________________________________________ 5. (1) Where _______ we meet this evening?

(2) You shall be punished if you disobey. 译：_________________。

（3)You ___________/ _________ _____ talk like that. （不应该）

(4) ---When can I come for the photos? I need them tomorrow afternoon.

---They ________ be ready by 12:00.

A can

B. should

C might

D need

(5) Why should you be so rude to your parents? 译：__________________________。

(6) I should think you’d better try it one more time. 译：________________________。

shall和should的用法小结：

_______________________________________________________________________________ _______________________________________________________________________________ 6.

(1) If you ______ wait for a moment, I will go with you. 如果你愿意等一会儿，我就同你去。

(2) ________ you pass the dictionary to me?

(3) He _________ come to help us when he was free. 他（过去）有空时常来帮我们的忙。

(4) She will listen to records, alone in her room, for hours. 译：_____________。

will和would的用法小结：

_______________________________________________________________________________ _______________________________________________________________________________ ** would rather+句子-->虚拟

would 与used to 的区别

Can和be able to的区别

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