1、Learning goals:,復(fù)習(xí)部分情態(tài)動詞的用法,1,2,情態(tài)動詞的新用法情態(tài)動詞表示推測,3,對物品的歸屬進行猜測,思考？,你記得學(xué)過哪些主要的情態(tài)動詞嗎？,1,2,情態(tài)動詞有哪些語法特征呢？,can. could, may, must，might, have to,3,情態(tài)動詞如何使用呢？,1. 情態(tài)動詞有具體的詞義。 2. 情態(tài)動詞沒有人稱和數(shù)的變化。 3. 情態(tài)動詞后必須跟動詞原形，兩者 一起構(gòu)成謂語動詞。 4. 一般疑問句提前邊， 否定句在后直接加 not.,can / can not,1. 表示能力 (會) 1) Mary can speak English, but she

2、 can not speak French. 2) Can you lift this heavy box? 3) Can you skate? 2. 表示允許 (可以) 1）Can I use your dictionary? 2）- Can I go home now? - Yes, you can. / No, you cant.,1. 是can 的過去式；表示過去的能力； He could ride a bike at the age of five. 2. 用于婉轉(zhuǎn)語氣,多用于問句?！澳埽梢浴?Could you please clean the room? - Could I c

3、ome to see you tomorrow? - Yes, you can. ( No, you cant. ) 此處 could 不是過去式，只是語氣更委婉， 答語中不能用could和 couldnt，要用can 和 cant。,could,may / may not,1. 表示請求和允許 (可以), 比can正式. May I come in? Hemaycomeifhelikes.,may的用法:,may / may not,may的一般疑問句，其否定回答用 cant 或 mustnt。 1. -May I go home now? -Yes, you may. / Sure. /

4、Yes, please. No, you cant./ mustnt. 2. -May I use your washroom now? -No, you _. Theres something wrong with the toilet. A. neednt B. mustnt C. shouldnt D. didnt,B,must / must not,must 必須 ,表示說話人的 主觀意志。 You must do your homework first.,must 的用法:,must / must not,mustnt 表示禁止 ，不準(zhǔn)，不允許。 You mustnt smoke h

5、ere. Youmustntplaywithfire.,must not的用法:,must / must not,以must開頭的疑問句， 肯定回答：Yes , must. 否定回答: No, neednt. 或 No, dont have to. - Must I clean the classroom now? - Yes, you_ . - No, you _ . / No, you _ .,must,neednt,dont have to,need作情態(tài)動詞，主要用于疑問句和否定句中 need 一般疑問句: 肯定回答用 Yes, must， 否定回答用 No,neednt . 或 No

6、,dont have to. 如： Need I do it now? Yes, you _。 No, you _ . need 作行為動詞，有人稱、數(shù)和時態(tài)的 變化后接to do， 即 need to do sth.,need,must,neednt / dont have to,might / may,might 1. 是 may 的過去式。 2. 表示推測, 可能性較小。 1) Hemightbeverybusynow. 2) Yourmother mightknowthetruth. may 也表示猜測，意為“可能”。 3) Where is my English book? It m

7、ight / may be in your desk.,.用適當(dāng)?shù)那閼B(tài)動詞填空： 1. I can play football. _you swim? 2. I cant play with you. I _finish my homework first. 3. I_ get up early tomorrow. because I have a meeting. 4. Nobody _live without air.,Can,must,must,can,5._I come in ?Yes ,please. 6. _you please tell me where the station

8、is ? 7. Must I finish the work now ? No, you _. 8. -Need I take this book out? -Yes , you _ . A. can B. may C. need D. must 9. _ the girl read before she went to school? A. Can B. Must C. Can D. Could,May,Could,neednt,D,D,情態(tài)動詞表示推測,Guessing game,Whose dog is this?,It might/ could be_.,He is a singer

9、and actor, he is known by everyone.,Whose dog is this?,It must be Liu Dehuas.,It might/ could be_.,He is a singer and actor, he is known by everyone.,An actor, he is tall, cool and popular.,Whose dog is this?,It might / could be_.,An actor, he is tall, cool and popular.,Whose dog is this?,It might /

10、 could be_.,It must be Zhang Hans.,He is a basketball player.,Whose car is this?,It might / could be _.,He is a basketball player.,Whose car is this?,It might / could be _. It must be_. It cant be _.,mine,Yao Mings,He is rich but helpful.,Whose car is this?,It might/ could be _. It cant be _. It mus

11、t be_.,He is rich but helpful.,Whose car is this?,It might/ could be _. It cant be _. I must be _.,mine,Bill Gates,情態(tài)動詞表推測講解,must 表示推測,must 表示非?？隙ǖ幕蛴邪盐盏耐茰y， 意為“一定，必定”。 只用在肯定句中，不能用于否定句中。,Eg. You have worked hard all day. You must be tired.,might, could 表示推測,語氣更委婉，表示的可能性較小，說話中留有余地，意為“可能，也許，或許”。,1. The

12、football might / could be Jacks. He likes all kinds of ball games. 2. Liu Mei isnt here today. She might / could be ill.,cant 意為“不可能”, 必用在否定句中。 - The man cant be Mr. Green. - He has gone to America.,Groupwork,情態(tài)動詞must, might, could, cant 表示推測的含義與用法。 情態(tài)動詞must, might, could, cant 后面都接動詞原形，都可以表示對現(xiàn)在情況的揣

13、測或推斷，但他們的含義有所不同：,must 一定，肯定（100%的可能性）,might, could 有可能，也許（20%80%的可能性）,cant 不可能，不會（可能性幾乎為零）,活動探究,情態(tài)動詞表示推測 ?？嫉挠校?對某事判斷的程度： must could might cant,must, could, might, cant,練練吧,Choose must , might, could, cant , can to fill in the blanks.,1.The storybook_ be hers. It has her name on it. 2.The beautiful t

14、rousers _ be Lilys. Because theyre too long. 3.I cant find my key. It_ be left at home. 4.The volleyball_ be Sallys or Anns. They both like playing volleyball. 5.The piano_ belong to Alice. She often plays the piano.,must,cant,could/might,might/could,might/could,7.The pen_ belong to him. Its on his

15、desk.,might/ could,8.My mother _ be at home. She left home with me. She has gone to go to work.,cant,9.This basketball _ be Nings. He plays basketball every day.,could/ might,10.This school uniform _ be Nicks. Its too small for him.,cant,6. _that wallet yours? -No, it _be mine. Mine is here.,Can,can

16、t,用must, could, cant, might填空。,1. -Excuse me, whose book is this? - It _ be Johns. It has his name on it. 2.The man _ be my English teacher. He has gone to Canada. 3. It _ be Jims football. He likes playing football very much.,must,cant,might /could,【例1】 - Jim is reading a book under that tree. - It

17、 _ be Jim. He has gone to Hainan. A. may B. mustnt C. cant D. could,C,典型例題解析,【例2】 - Where are you going this month? - We _ go to Xiamen, but were not sure. A. neednt B. must C. might D. mustnt,C,典型例題解析,【例3】 Wheres Mr Li? I have something important to tell him. You _ find him. He _ Japan. A. may not,

18、 has gone to B. may not, has been to C. cant， has gone to D. cant, has been to,C,典型例題解析,【例4】 Could I look at your pictures? Yes, of course you _. A. could B. can C. will D. might,B,典型例題解析,【例5】Where is Jack，please? He_be in the classroom.2013 杭州 A. can B. need C. would D. must,D,典型例題解析,學(xué)習(xí)物品的歸屬,(可能是Ma

19、ry。),(不可能是Mary。),Mum: Who is it ?,J: It must be Tom.,M: It might/could be Mary.,J: It cant be Mary. She is in China.,(一定是Tom。),(可能是Kate。),(絕對不是Marry。),Mum: Who is it? Jim: (一定是Tom。),It must be Tom.,It might/ could be Kate.,It cant be Marry. She is in China.,-It_ belong to Mark or Lili Because they b

20、oth play football.,-Whose football is this ?,might could must,Lili,Mark,-It_ belong to Bush. Because_,Bush,-Whose red bicycle is this ?,cant,his bike is white and blue.,Can this T-shirt be Jims?,It cant be Jims.,Because its too small for him.,Jim,Liu xiang,-It_ be Liu Xiangs.,-Whose exercise book is

21、 this ?,must,It must belong to Liu Xiang,Because it has his name on it.,語言點：whose 誰的,1.Whose truck is that ? (同義句) _ is that _ ? 2. I think that is my fathers shirt. （就劃線部分提問） _ shirt do you think _ _ ? 3. By _ the car was invented?,Whose,that is,Whose,truck,whom,Whose is this ?,It cant be xxs.,It m

22、ust be xxs.,It could /might be xxs.,belong to xxx.,belong to xxx.,belong to xxx.,It is mine/yours/hers/his/ours.,= It belongs to me/you/her/him/us.,Its Li Pings.,= It belongs to Li Ping.,belong to sb (名詞/代詞的賓格) = be sbs (名詞所有格/ 名詞性物主代詞),belong to 屬于,1. 不能用于進行時態(tài) 2. 不能用于被動語態(tài) 3. belong to +名詞或代詞的賓格。 4.

23、 常與名詞性物主代詞或名詞所有格進行 句型轉(zhuǎn)換, 即： belong to + sb. / 代詞賓格 = be + sbs / 名詞性物主代詞。,1. Who is the owner of the black box? (同義句轉(zhuǎn)換) _ does the black box _ _ ? 2. Would you like to have a _ (野餐) with us this weekend?,課時訓(xùn)練,Who/Whom,belong to,picnic,3. This bike is Lucys. (同義句) This bike _ Lucy. 4. It must be hers.

24、 (變否定句) It _ _ hers. 5. -Whose storybook is this? - It _ Jack. I saw him reading just now. A. must be B. must belong to C. is D. be belong to,belongs to,cant be,B,小結(jié)：情態(tài)動詞歸納,can : 1. 表示能力，“能，會” 2. 表示允許，“可以”， Can I ? 較口語化。 3. 表示推測。 cant 只用于否定句中。,could : 1. 是can 的過去式，表示過去的能力。 2. could表示更為委婉的語氣。 3. 表示猜測，“很可能”,may: 1. 表示許可，“可以”。 2. 以may引導(dǎo)的一般疑問句的否定回答cant / mustnt 用。 3. 表示推測，用于肯定句中。,might : 1. 是may的過去式。 2. 表示猜測，可能性比could小。,must ： 1. 表示說話人的主觀意志，“必須”。 2. mustnt 表示“禁止，不允許”。 3. must引導(dǎo)的疑問句，否定回答用neednt / dont have to. 4.must 表示猜測，”一定“，只用于肯定句中。,need: 1.