Module?3?Unit?6?Electricity Grammar
教案
教学目标
情态动词can ,must, may的用法
重点难点
掌握三个情态动词的用法
考点及考试要求
掌握情态动词的用法并能灵活运用。
教学过程
Step?1:?homework?checking?and?dictation?
Step?2:?情态动词?
一、概念：情态动词表示说话者的情感、态度和语气。它们本身有一定的意义，但没有人称和数的变化，不能单独作谓语，须和动词一起构成句子的谓语。表示否定时在情态动词后加not?(must，have?to除外)，表示疑问时将情态动词提至主语前即可。? 情态动词数量不多，但用途广泛，主要有：?can?(could),?may?(might),?must等?.?
二、can/could?
1.?表示能力（如体力和脑力方面），意为“能、会”?
Can?you?speak?Chinese??Can?you?play?basketball??
2.?表示请求或者允许，多用在口语中，意为“可以、能”等客观条件的允许。用于疑问句中用来提出要求，用于否定句中表示不允许。?Can?you?help?me?? You?can’t?play?the?computer?
3.?表示可能，理论上的可能,通常用于否定句及疑问句中。?It?can’t?be?sunny?all?the?time.?
4.?could可以作为can的过去式，也可以在提出请求时表示委婉。?He?could?save?the?little?boy.?Could?you?help?me??
三、may,?might?
1.?表示“许可、准许”，此时与can同义，可以互换使用You?may/can?go?to?the?cinema?this?evening.?
☆注意：表许可时其答语可以用“Yes, you?may.”但是由于用may做肯定回答语气显得生硬、严肃，因此一般用Yes,?please.?/Certainly.?/?Of?course.这些回答显得热情、客气。拒绝对方时，其答语可以用No,?you?mustn’t.?/?No,?you?can’t.?/?Sorry,?you?can’t.?/?No,?please?don’t等?
--May?I?come?in??????
?--Yes,?please?
--May?I?use?your?ruler?????????
--Certainly.?Here?you?are.?
2.?表示可能性时，常用在肯定句中，意为“可能、也许”?He?may?be?very?busy?now.? He?said?that?she?might?not?be?at?work?today.? ?can和may都可以表示推测。Can通常用在否定句和疑问句中，may通常用在肯定句和否定句中。虽然两者都可以用于否定句，但是程度不同，can’t的语气比may?not更强。?It?can’t?be?true.?It?may?not?be?true.?
3.?表示希望、祈求、祝愿，常可以译为“祝愿”?May?you?have?a?good?time.?May?you?be?happy.?
4.?might可以作为may的过去式，也可以在提出请求时表委婉；在表示可能性时，might的可能性比may更小?
☆注意：can和may的区别? 1.?can和may都可以表示“许可”，在征求对方意见时用may比较多?????May?I?go?now??
2.?在询问客观上是否可以时，用can??????Can?we?take?the?books?out??
3.?在两者都可以用时，may更客气一些?
4.?在陈述句中用can比较多?????You?can?sit?here.?
5.?can还可以表示能力，may无此用法?
6.?在否定句中一般不用may?not，常用can’t表示不可能?He?can’t?be?at?home?tonight.?
四、must?
1.?表示“必须、一定要”，多强调说话人的主观看法????否定式mustn’t表示“一定不要，禁止”??????You?must?see?the?doctor.? ?Must?you?go?soon?? ??对于must开头表必须的一般疑问句，如果要做否定回答，可以用needn’t,?don’t?have?to，不能用mustn’t???--Must?I?come?over?tonight?????--No,?you?needn’t?
2.?表示推测，意为“准是，一定是”，但是通常只用于肯定句，在否定句、疑问句中通常用can’t?It?must?be?true.? Can?it?be?true?????????It?can’t?be?true.??
Step?3：Practice?
一、用can，may，must的适当形式填空
?1.?__________?I?ask?you?a?question??
2.?Attending?a?ball?__________?be?exciting?
3.?Michael?__________?be?a?policeman,?for?he?is?mush?too?short.?
4.?–Are?you?coming?to?Jeff’s?party??????
?--I’m?not?sure.?I?__________?go?to?the?concert?instead.?
5.?He?never?takes?a?taxi.?He?__________?be?very?poor.?
6.?I?thought?you?__________?like?something?to?read,?so?I?brought?you?some?books.
?7.?Look!?I?__________?stand?on?my?hands.?
8.?He?__________?have?been?to?Shanghai.?
9.?The?play?is?not?interesting.?I?really?__________?go?now.?
10.?She?__________?like?this?place.?
二、选择?
1.?Helen?__________?go?on?the?trip?with?us,?but?she?isn’t?quite?sure?yet.?
A?shall????B?must????C?may????D?can?
2.?Johnny,?you?__________?play?with?the?knife,?you?__________?hurt?yourself.?
A?won’t, can’t??? ?B?mustn’t,?may????
C?shouldn’t,?must????D?can’t,?shouldn’t?
3.?A?computer?__________?think?for?itself;?it?must?be?told?what?to?do.?
A?can’t?????B?couldn’t????C?may?not????D?might?not?
4.?–Could?I?borrow?your?dictionary??????????
--Yes,?of?course?you?__________.?
A?must????B?might???C?can????D?could?
5.?How?__________?you?say?that?you?really?understand?the?whole?story?if?you?have?covered?only?a?part?of?the?article?
A?can???B?must????C?need????D?may?
6.?Oh,?dear!?What?on?earth?__________?this?mean?
?A?could???B?can???C?may???D?might?
7.?–Must?I?finish?my?homework?today?????????
--No,?you?__________.?
A?can’t?????B?needn’t?????C?mustn’t????D?may?not?
8.?--__________?I?speak?to?Mary????????--Speaking.?
A?Must????B?Need???C?May????D?Shall?
9.?This?match?problem?is?too?hard.?Nobody?__________?do?it.?
A?may?not????B?may???C?can’t????D?can?
10.?–Can?you?speak?Japanese???--No,?I?__________.?
A?can’t????B?mustn’t????C?may?not????D?needn’t?Homework?
1.?As?we?know,?fish?______?die?out?of?water.???
A.?may????B.?is?going?to????C.?can????D.?will?
2.?–Can?you?answer?my?question,?Lily??–Yes,?I?______.???
A.?may???B.?need????C.?must????D.?can?
3.?–Excuse?me,?______?you?tell?me?the?way?to?the?nearest?bus?station???
?--Sorry,?I?can’t.?I’m?a?stranger?here.???
A.?can????B.?need????C.?must????D.?may?
4.?After?such?a?long?journey,?the?children?______?be?very?tired?now.???
?A.?can????B.?must????C.?have?to????D.?need?
5.?You’ve?made?the?same?mistakes?again.?You?______?be?more?careful?next?time.????A.?can????B.?may????C.?had?to????D.?should?
6.?–Would?you?like?to?go?swimming?with?me?this?afternoon?????
--I’d?love?to.?But?I’m?afraid?I?______.?I?have?too?much?work?to?do.?
A.?can’t????B.?mustn’t????C.?needn’t????D.?may?not?
7.?--______?you?like?to?go?shopping?with?me??–Yes,?I?______.? ???
A.?Would,?would????B.?Will,?will?like????
C.?Would,?would?love????D.?Would,?would?love?to?
课件9张PPT。情态动词Modal verbs 情态动词一、定义
情态动词表示说话者的情感、态度和语气。它们本身有一定的意义，但没有人称和数的变化，不能单独作谓语，须和动词一起构成句子的谓语。表示否定时在情态动词后加not (must，have to除外)，表示疑问时将情态动词提至主语前即可。情态动词后接动词原形;
没有人称和数的变化;
不能单独作谓语, 后接动词原形共同作谓语;
其否定形式在后面直接加not。Modal verbs
情态动词can / can not
may / may not
must / must notModal verbs
情态动词二、常见情态动词用法 may / may not●以may开头的疑问句，其否定回答用can’t或 mustn’t。
--May I go home now?
--Yes, you may.
No, you can’t.may not的用法:must / must not1. mustn’t表示禁止(不准；不允许)
You mustn’t smoke here.
2. 以must开头表比必须的疑问句，其否定回答要用needn’t.
-- Must I clean the classroom now?
-- Yes, you must.
No, you needn’t.must not的用法:
