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英语必修3&4Unit 1 Festivals around the world评课课件ppt
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这是一份英语必修3&4Unit 1 Festivals around the world评课课件ppt，共52页。PPT课件主要包含了情态动词用法，情态动词的语法特征，表请求，表意愿，表许可，Would，Saturday，Could，Exercise ，May等内容，欢迎下载使用。
1) 情态动词不能单独做谓语, 除ught和have外, 后面只能接不带t的不定式。
2) 情态动词没有人称, 数的变化, 但有些情态动词, 如can、will也有一般式和过去式的变化。
3) 情态动词的“时态”形式并不是时间区别的主要标志, 不少情况下, 情态动词的现在式形式和过去式形式都可用来表示现在时间、过去时间和将来时间。
只作情态动词的 can / culd, may / might, ught t, must可情态可实义的 need, dare 可情态可助动词的 shall / shuld, will / wuld相当于情态动词的 have t, had better
1) can的主要用法是： A. 表示体力或脑力的能力： eg. The girl can dance very well. B. 表示说话的推测﹑事物的可能性等: eg. Can the news be true? C. 在口语中, can可以表示请求或允许: eg. Can I sit here?
can表示“能够”时与短语be able t同义，但can只用于一般现在时或过去时，而后者可用于各种时态。另外，can表示个人有某种能力，而be able t表示某人通过努力、克服困难做成某事，相当于succeed in ding sth.；叙述过去事实时，最好用was / were able t，因为culd只表示过去具有某种能力。
如：Can yu understand the different kinds f English these peple are using?Tw years later, he was able t speak very gd Chinese.
2) culd的主要用法是： A. culd 是can的过去式, 表示与过去 有关的能力和推测: e.g. We all knew that the yung man culdn’t be a dctr. B. culd可以代替can表示请求, 但语气较can客气、委婉:
e.g. Culd yu lend me yur dictinary? Culd I use yur bike? 3) can和culd接动词的完成形式，表示可能已经做某事。can用在否定和疑问句中, 表示不相信、怀疑等态度。 e.g. They can't have gne ut because the light is still n.
以culd或wuld提问时，不能再以culd或wuld作答，而应该用can或will。如：—Culd I brrw yur dictinary?—Yes, f curse yu can.
may 和might ： may 常用来表示： A. 表示请求、允许; 比can较为正式: e.g. May I cme in ? Yu may g nw. B. 表示说话人的猜测: “也许” “可能”: 通常只用于肯定句和否定句中。
e.g. --I believe the man is frm England. --But I may be wrng. The guest may arrive this afternn. 在肯定句中，may的可能性比can 高，may表示现实的可能性，can表示理论上的可能性。如：
The rad may be blcked. 这条路可能不通了。 The rad can be blcked. 这条路可能会是不通的。 在疑问句中，表示可能性用can。 如：Where can he be? 他会在哪呢？
C. 表示祝愿;但语气较正式: e.g. May yu succeed! May yu have a gd jurney! might 的用法有: 多在间接引语中表示过去的可能和允许。如: She said that he might take her bike. 她说他可以拿她的自行车去用。
除了在间接引语中以外，might 一般不表示过去的可能或者许可。如要表示过去的可能可以用culd, 表示过去的许可可以用was (were) allwed t 或者had permissin t 。 表示现在的可能，其可能性要比may 小。如：
She might g hme tmrrw. 说不定他明天会回家。 表示现在的许可, 语气比may较委婉, 一般用于疑问句(包括间接疑问句), 不可用于肯定句或者否定句。 如: Might I have a wrd with yu? 我可以和你说句话吗？
1. will是助动词或是情态动词？ will用于构成将来时是助动词。用于表示“意志”“决心”“请求”是情态动词。wuld亦同理。 e.g. I will tell yu smething imprtant. 我要告诉你一些重要的事。 （助动词）
Will yu tell her that I'm here? 请您告诉她说我在这儿，好吗？ （情态动词） 2. 在疑问句中用于第二人称，提出请求或询问。 e.g.: If yu want help - let me knw, will yu? 如果你需要帮助, 让我知道, 好吗?
Will yu type this, please? 请打印这个, 好吗？ Wn't yu sit dwn? 请坐下, 好吗？ 3. wuld比will客气委婉。 e.g.: Wuld yu help us, please? 请您帮助我们，好吗？
I’d g there with yu. 我要和你一块到那儿去。 Teacher wuldn’t allw it. 老师不会允许这件事。
shall和shuld：
1. shall用于构成将来时是助动词。 shall用于征求对方的意见，表示 “决心” 是情态动词。 e.g.: Perhaps I shall pay a visit t England this winter. 可能今年冬天我会去英国观光。 （构成一般将来时, 助动词）
Shall we g by train, Mm? 妈妈，我们乘火车去好吗？ （用于征求对方的意见，情态动词） I shall g at nce. 我必须立即去。 （表 “决心”，情态动词）
shall可以用于第一、三人称的疑问句，表示征求意见或许可；还可用于第二、三人称的陈述句中，表示允诺、警告、命令或威胁等。如：Yu shall be punished if yu break the rule.
2. shuld表示义务、建议、劝告，意为 “应该”。 “shuld+ have+过去分词” 表示本应该在过去做但没有做。 eg: Yu shuld keep yur prmise. 你应该遵守诺言。 She shuld have passed the exam. 她应该通过考试的。
must和 have t
1.must用于一般问句中,肯定回答用must否定式用 needn’t或dn’t have t，做 “不必”, mustn’t表示“禁止，不允许”
— Must I finish all assignments at a time?
—Yes, yu must. N, yu needn't.
I dn’t like this TV set. We must buy a new ne. There was n mre bus. They had t walk hme.
2.表示“必须”这个意思时，must 和have t 稍有区别。must着重说明主观看法，have t 强调客观需要。另外，have t 能用于更多时态。
Yu must be the new teacher. He must be jking. There is nbdy here. They must have all gne hme.
3.must表示对某人某事的猜测, 作“准是”, “一定” , 一般用于肯定句中。对过去发生的事情作肯定判断用must have dne
He must cme and wrry her with questin, just when she was busy cking the dinner. Of curse，after I gave her my advice，she must g and d the ppsite.
4. must表示“偏要, 硬要”, 指做令人不快的事情
can / culd, may / might, shuld和must都可表示肯定的推测。can / culd表示客观可能性；may表示推测时，其语气不肯定；might语气更弱，表示某事实际发生的可能性；shuld表示确定或可能有的未来或期待；must表示比较肯定的语气。如：
I think advertisements can be quite dangerus.The newcmer may be dismissed by the cmpany.The rescue team shuld arrive by 5 ’clck this afternn.I think the ld wman must be a nice persn.
culd, might, wuld, shuld都可表示委婉语气。如:I wnder if yu culd let me use yur cell phne. Might I knw yur telephne number?
2. A: ______ Xia Feng find the rigin f Easter frm that bk? B: N, he _____________.
1. A: ______ yu like t g t a special event with us n Saturday? B: Yes, I _____________________ _________.
’d like t g with yu n
culdn’t find it
3. A: _____ I g with my friend t the harvest festival? B: Yes, yu _________________ ________.
4. A: If I want t be a dctr _______ I study science? B: Yes, yu __________________.
shuld study science
may g (with yur
5. A: He is very handsme. ____ he play the rle f the prince? B: N, he _______________________ ______.
can’t play the rle f the
6. A: The neighbur’ s children are lder this year. _______________ they stp playing tricks at Hallween? B: Perhaps, they __________ ________________________. __________________________ ____________.
r shuld stp playing tricks
playing tricks at Hallween
at Hallween
—I think I’ll give Bb a ring later in the week. —Yu _____. Yu haven’t been in tuch with him fr ages. A. will B. may C. have t D. shuld
I. Chse the crrect answer.
2. Jhn, lk at the time. _____ yu play the pian at such a late hur? A. Must B. Can C. May D. Shuld
3. There _____ any difficulty abut passing the rad test since yu have practiced a lt in the driving schl. A. mustn’t be B. shan’t have C. shuldn’t be D. needn’t have
4. The Wrld Wide Web is smetimes jkingly called the Wrld Wide Wait because it ______ be very slw. A. Shuld B. must C. will D. can5. Helen _____ g n the trip with us, but she isn’t quite sure yet. A. shall B. must C. may D. can
6. —Smene is kncking at the dr. _____ it be Venis? —N, it _____ be her; she left fr New Yrk this mrning. A. Can; mustn’t B. Might; can’t C. May; desn’t D. Can; can’t
7. Mike prmised his dctr he _____ nt drink, and he has never drunk ever since. A. might B. shuld C. culd D. wuld
8. —Is there a mvie n in the cinema tnight? —There _____ be. I will phne the cinema and find it ut. A. might B. shuld C. can D. must
9. When I was studying at Beijing University, I _____ take a walk alng the lake every evening. A. will B. wuld C. culd D. shall
10. Mr Brwn, many students want t see yu. _____ they wait here r utside? A. Shall B. Will C. Can D. Wuld
can; culdWhen I was yung I _____ climb any tree in the frest.Learning a language _____ be a real challenge.
II. 选用正确的情态动词填空。
may; mightI asked if I _____ g hme half an hur earlier tday.There ____________ nt be enugh mney t pay fr the repairs.
may / might
will; wuldWhen he gt lder, he _____ never d his hmewrk.Nancy _____ keep talking unless yu tell her t shut up.
shall; shuldBy nw, they ______ already be in Dubai.I _____ be replaced by smene frm the New Yrk ffice.
must; can’tYu _____ have stayed up. Yu lk s tired.Yu _____ be 45! I thught yu were abut 25 years ld.
Harvest and Thanksgiving festivals canbe very happy events. (P2)[考点] 情态动词can的用法。[考例1] It is usually warm in my hmetwn in March, but it _____ be rather cld smetimes. (福建 2008)A. must B. can C. shuld D. wuld
选B。can表示“可能”，意为“有时天气可能会相当冷”。must必须、肯定；shuld应该；wuld表示过去常常。
1) 情态动词不能单独做谓语, 除ught和have外, 后面只能接不带t的不定式。
2) 情态动词没有人称, 数的变化, 但有些情态动词, 如can、will也有一般式和过去式的变化。
3) 情态动词的“时态”形式并不是时间区别的主要标志, 不少情况下, 情态动词的现在式形式和过去式形式都可用来表示现在时间、过去时间和将来时间。
只作情态动词的 can / culd, may / might, ught t, must可情态可实义的 need, dare 可情态可助动词的 shall / shuld, will / wuld相当于情态动词的 have t, had better
1) can的主要用法是： A. 表示体力或脑力的能力： eg. The girl can dance very well. B. 表示说话的推测﹑事物的可能性等: eg. Can the news be true? C. 在口语中, can可以表示请求或允许: eg. Can I sit here?
can表示“能够”时与短语be able t同义，但can只用于一般现在时或过去时，而后者可用于各种时态。另外，can表示个人有某种能力，而be able t表示某人通过努力、克服困难做成某事，相当于succeed in ding sth.；叙述过去事实时，最好用was / were able t，因为culd只表示过去具有某种能力。
如：Can yu understand the different kinds f English these peple are using?Tw years later, he was able t speak very gd Chinese.
2) culd的主要用法是： A. culd 是can的过去式, 表示与过去 有关的能力和推测: e.g. We all knew that the yung man culdn’t be a dctr. B. culd可以代替can表示请求, 但语气较can客气、委婉:
e.g. Culd yu lend me yur dictinary? Culd I use yur bike? 3) can和culd接动词的完成形式，表示可能已经做某事。can用在否定和疑问句中, 表示不相信、怀疑等态度。 e.g. They can't have gne ut because the light is still n.
以culd或wuld提问时，不能再以culd或wuld作答，而应该用can或will。如：—Culd I brrw yur dictinary?—Yes, f curse yu can.
may 和might ： may 常用来表示： A. 表示请求、允许; 比can较为正式: e.g. May I cme in ? Yu may g nw. B. 表示说话人的猜测: “也许” “可能”: 通常只用于肯定句和否定句中。
e.g. --I believe the man is frm England. --But I may be wrng. The guest may arrive this afternn. 在肯定句中，may的可能性比can 高，may表示现实的可能性，can表示理论上的可能性。如：
The rad may be blcked. 这条路可能不通了。 The rad can be blcked. 这条路可能会是不通的。 在疑问句中，表示可能性用can。 如：Where can he be? 他会在哪呢？
C. 表示祝愿;但语气较正式: e.g. May yu succeed! May yu have a gd jurney! might 的用法有: 多在间接引语中表示过去的可能和允许。如: She said that he might take her bike. 她说他可以拿她的自行车去用。
除了在间接引语中以外，might 一般不表示过去的可能或者许可。如要表示过去的可能可以用culd, 表示过去的许可可以用was (were) allwed t 或者had permissin t 。 表示现在的可能，其可能性要比may 小。如：
She might g hme tmrrw. 说不定他明天会回家。 表示现在的许可, 语气比may较委婉, 一般用于疑问句(包括间接疑问句), 不可用于肯定句或者否定句。 如: Might I have a wrd with yu? 我可以和你说句话吗？
1. will是助动词或是情态动词？ will用于构成将来时是助动词。用于表示“意志”“决心”“请求”是情态动词。wuld亦同理。 e.g. I will tell yu smething imprtant. 我要告诉你一些重要的事。 （助动词）
Will yu tell her that I'm here? 请您告诉她说我在这儿，好吗？ （情态动词） 2. 在疑问句中用于第二人称，提出请求或询问。 e.g.: If yu want help - let me knw, will yu? 如果你需要帮助, 让我知道, 好吗?
Will yu type this, please? 请打印这个, 好吗？ Wn't yu sit dwn? 请坐下, 好吗？ 3. wuld比will客气委婉。 e.g.: Wuld yu help us, please? 请您帮助我们，好吗？
I’d g there with yu. 我要和你一块到那儿去。 Teacher wuldn’t allw it. 老师不会允许这件事。
shall和shuld：
1. shall用于构成将来时是助动词。 shall用于征求对方的意见，表示 “决心” 是情态动词。 e.g.: Perhaps I shall pay a visit t England this winter. 可能今年冬天我会去英国观光。 （构成一般将来时, 助动词）
Shall we g by train, Mm? 妈妈，我们乘火车去好吗？ （用于征求对方的意见，情态动词） I shall g at nce. 我必须立即去。 （表 “决心”，情态动词）
shall可以用于第一、三人称的疑问句，表示征求意见或许可；还可用于第二、三人称的陈述句中，表示允诺、警告、命令或威胁等。如：Yu shall be punished if yu break the rule.
2. shuld表示义务、建议、劝告，意为 “应该”。 “shuld+ have+过去分词” 表示本应该在过去做但没有做。 eg: Yu shuld keep yur prmise. 你应该遵守诺言。 She shuld have passed the exam. 她应该通过考试的。
must和 have t
1.must用于一般问句中,肯定回答用must否定式用 needn’t或dn’t have t，做 “不必”, mustn’t表示“禁止，不允许”
— Must I finish all assignments at a time?
—Yes, yu must. N, yu needn't.
I dn’t like this TV set. We must buy a new ne. There was n mre bus. They had t walk hme.
2.表示“必须”这个意思时，must 和have t 稍有区别。must着重说明主观看法，have t 强调客观需要。另外，have t 能用于更多时态。
Yu must be the new teacher. He must be jking. There is nbdy here. They must have all gne hme.
3.must表示对某人某事的猜测, 作“准是”, “一定” , 一般用于肯定句中。对过去发生的事情作肯定判断用must have dne
He must cme and wrry her with questin, just when she was busy cking the dinner. Of curse，after I gave her my advice，she must g and d the ppsite.
4. must表示“偏要, 硬要”, 指做令人不快的事情
can / culd, may / might, shuld和must都可表示肯定的推测。can / culd表示客观可能性；may表示推测时，其语气不肯定；might语气更弱，表示某事实际发生的可能性；shuld表示确定或可能有的未来或期待；must表示比较肯定的语气。如：
I think advertisements can be quite dangerus.The newcmer may be dismissed by the cmpany.The rescue team shuld arrive by 5 ’clck this afternn.I think the ld wman must be a nice persn.
culd, might, wuld, shuld都可表示委婉语气。如:I wnder if yu culd let me use yur cell phne. Might I knw yur telephne number?
2. A: ______ Xia Feng find the rigin f Easter frm that bk? B: N, he _____________.
1. A: ______ yu like t g t a special event with us n Saturday? B: Yes, I _____________________ _________.
’d like t g with yu n
culdn’t find it
3. A: _____ I g with my friend t the harvest festival? B: Yes, yu _________________ ________.
4. A: If I want t be a dctr _______ I study science? B: Yes, yu __________________.
shuld study science
may g (with yur
5. A: He is very handsme. ____ he play the rle f the prince? B: N, he _______________________ ______.
can’t play the rle f the
6. A: The neighbur’ s children are lder this year. _______________ they stp playing tricks at Hallween? B: Perhaps, they __________ ________________________. __________________________ ____________.
r shuld stp playing tricks
playing tricks at Hallween
at Hallween
—I think I’ll give Bb a ring later in the week. —Yu _____. Yu haven’t been in tuch with him fr ages. A. will B. may C. have t D. shuld
I. Chse the crrect answer.
2. Jhn, lk at the time. _____ yu play the pian at such a late hur? A. Must B. Can C. May D. Shuld
3. There _____ any difficulty abut passing the rad test since yu have practiced a lt in the driving schl. A. mustn’t be B. shan’t have C. shuldn’t be D. needn’t have
4. The Wrld Wide Web is smetimes jkingly called the Wrld Wide Wait because it ______ be very slw. A. Shuld B. must C. will D. can5. Helen _____ g n the trip with us, but she isn’t quite sure yet. A. shall B. must C. may D. can
6. —Smene is kncking at the dr. _____ it be Venis? —N, it _____ be her; she left fr New Yrk this mrning. A. Can; mustn’t B. Might; can’t C. May; desn’t D. Can; can’t
7. Mike prmised his dctr he _____ nt drink, and he has never drunk ever since. A. might B. shuld C. culd D. wuld
8. —Is there a mvie n in the cinema tnight? —There _____ be. I will phne the cinema and find it ut. A. might B. shuld C. can D. must
9. When I was studying at Beijing University, I _____ take a walk alng the lake every evening. A. will B. wuld C. culd D. shall
10. Mr Brwn, many students want t see yu. _____ they wait here r utside? A. Shall B. Will C. Can D. Wuld
can; culdWhen I was yung I _____ climb any tree in the frest.Learning a language _____ be a real challenge.
II. 选用正确的情态动词填空。
may; mightI asked if I _____ g hme half an hur earlier tday.There ____________ nt be enugh mney t pay fr the repairs.
may / might
will; wuldWhen he gt lder, he _____ never d his hmewrk.Nancy _____ keep talking unless yu tell her t shut up.
shall; shuldBy nw, they ______ already be in Dubai.I _____ be replaced by smene frm the New Yrk ffice.
must; can’tYu _____ have stayed up. Yu lk s tired.Yu _____ be 45! I thught yu were abut 25 years ld.
Harvest and Thanksgiving festivals canbe very happy events. (P2)[考点] 情态动词can的用法。[考例1] It is usually warm in my hmetwn in March, but it _____ be rather cld smetimes. (福建 2008)A. must B. can C. shuld D. wuld
选B。can表示“可能”，意为“有时天气可能会相当冷”。must必须、肯定；shuld应该；wuld表示过去常常。
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