情態(tài)動詞的用法-優(yōu)質公開課-重大三起6下課件

1、 情態(tài)動詞的用法 情態(tài)動詞的用法Yes,she can.Can she come to the party?Can sheYes,she can.Can she come to thNo,he cant.He has to study.Can he go to the baseball game?Can heNo,he cant.Can he go to the bCan they come to the party？No ，they cant.They have to study for the math test.Can theyCan they come to the party？No

2、Can you come to my party on Saturday?Sure, Id love to.Sorry, I must study for a math test.Can you go to the movies tomorrow night?Sure. That sounds great.Im afraid not. I have the flu.Can he go to the party?No, he cant. He has to help his parents.Can she go to the baseball game?No. shes not availabl

3、e. She must go to the doctor.Can they go to the movies?No, theyre not free. They might have to meet their friends.Grammar FocusCan you come to my party on Sa情態(tài)動詞主要有：may/might, can/could,must, have to, shall/should, will/would,ought to, need, dare, used to。 Grammar focus現(xiàn)在我們來著重學習情態(tài)動詞can 以及have to 的用法

4、。其特征主要有：情態(tài)動詞主要有：may/might, can/could,G1. 不能獨立作謂語，只能和動詞原形一起構成謂語，表示說話人的語氣和情態(tài)。2. 沒有人稱和數(shù)的變化。 (have to除外)3. 否定形式：在其之后加not (have to除外)。疑問形式：情態(tài)動詞提到主語之前(have to 除外)。1. 不能獨立作謂語，只能和動詞原形一起構成謂語，表示說話人 can為情態(tài)動詞, 在本單元中表示請求, 用于發(fā)出邀請，后跟動詞原形。當同意接受對方的邀請時, 常用Sure, Id love to. / Certainly. /Of course.等來回答；若不接受, 常用Sorry等來

5、有禮貌地拒絕, 一般情況下需要說明不能接受邀請的原因以表示歉意。 can為情態(tài)動詞, 在本單元中表示請求, Can you come to my birthday party tomorrow？ 明天你來參加我的生日聚會，好嗎？ Sorry, I cant. I am going to visit my grandpa. 很抱歉，我來不了，我要去看我爺爺。 Can you come to my birthda1. can/may都可表示“許可” 。may用于較正式、客氣的場合，而can比較隨便（口語）。 You may/can smoke here. Borrowers may not tak

6、e out of the library more than two books at a time.The policeman says you cant park here.1. can/may(2) May/Can I/we? 表示征詢對方許可。 Can you? 表示請求。 May I use your phone? Yes, you may./Yes, please. /No, you may not. /No, you mustnt. /No, youd better not. /Im afraid not. (2) May/Can I/we? 表示征詢對方許可。 /Im sorr

7、y. Id rather you didnt. Can I go out and play, Mum? Yes/Certainly, you can. /No, you cant. Can you help me with this bag? With pleasure./Sorry, I cant. /Im sorry. Id rathe Mr. Reed looks pale. He may be ill. (事實上的可能). Mr. Read is in poor health. He can be ill at any time. (邏輯、理論上的可能) This news may b

8、e true. (=might/could) (事實上的可能) Wang Wei can be really stubborn. (有時或偶然可能會)(=could) (3) 都可表示“可能性”肯定句 Mr. Reed looks pale. He may否定句This news may not be true. (也許不, =might not )This news cant be true. (不可能, =couldnt)疑問句Can this news be true?(=Could)May this news be true? 否定句(4) can 還可表示“能力”、“能夠” You

9、can swim, cant you? No, I cant. I cant promise anything, but Ill do what I can. Tickets can be bought from the Tourist Information Center. (4) can 還可表示“能力”、“能夠”2. might/could 分別為may和can的一般過去時，分別表示過去的“許可”、“可能”和“能力” 、“能夠”等。The children asked whether they could/might go for a swim.(過去許可) I was afraid i

10、t might rain that afternoon. (過去可能) He asked if the news could be true. (過去可能)(Can the news be true?) 2. might/could She said he could speak several languages. (過去能力) I couldnt find her telephone number. (過去能夠) (2) 都可表示現(xiàn)在或將來的“可能性”。語氣沒有may肯定。Theres someone at the door. It could/might(=may) be George.

11、 (肯定句) She said he could speak sev /It couldnt (=cant) be George.(否定句) /Could(=Can) it be George?(疑問句) According to the radio it could/might/ may rain tomorrow. Lightning could (=can) be dangerous. (3) Might/Could I/we ? Could you ? /It couldnt (=cant) be 表示更委婉、更客氣的請求。 Might/Could I ask you one more

12、 question? Yes, of course you may/might/can/ could. Could you help me with these boxes? Of course I can./With pleasure. 表示更委婉、更客氣的請求。 有時在陳述句中也表示更委婉、更客氣的請求或邀請：I wonder if I could/might leave now.I dont suppose you could/might. 有時在陳述句中也表示更委婉、更客氣的請求或邀請3. can/be able tocan= am/is/are able to = shall/wil

13、l be able to No one can do it. =No one is able to do it. Can you come tonight? =Will you be able to come tonight?3. can/be able to(2) could 表示過去的技能、本能; was/ were able to 表示過去某一具體場合經(jīng)過努力而做成某事。 I could swim when I was six. He started late, but he was able to catch the eight oclock train. =but he manage

14、d to catch =but he succeeded in catching (2) could 表示過去的技能、本能; was/ wer But: Mr. Smith couldnt/wasnt able to see you because hes got a bad cold.(3) be able to還有完成式和非謂語形式。 Im sorry I havent been able to answer your letter. =Im sorry for not being able to answer your letter. To be able to run is very

15、important for a footballer. But:4. have to的意思是“必須、不得不”, 往往 強調由于客觀原因而必須做某事。 have to 后接動詞原形；have to有人稱、 數(shù)和時態(tài)的變化, 其第三人稱單數(shù)形式為 has to, 其疑問形式和否定形式要借助于 助動詞do或does來完成。例如：4. have to的意思是“必須、不得不”, 往往We have to look after our sister at home.我們不得不在家照顧我們的妹妹。Does he have to get up early tomorrow morning? 明天早上他必須早起

16、嗎？I dont have to stay at home today.今天我不必呆在家里。We have to look after our sist情態(tài)動詞“have to”與其他的情態(tài)動詞如“can”, “may” “must”和 “should” 不同。1) 這4個情態(tài)動詞沒有人稱的變化, 而have to有, 它的第三人稱單數(shù) 為“has to” 如： He should study hard. He has to study hard. 情態(tài)動詞“have to”與其他的情態(tài)動詞2) 這4個情態(tài)動詞在一般疑問句中將它們放 在句首, 在否定句中直接在他們后邊加not即可。我們以can

17、為例:-Can he go with us? 他能和我們一起去嗎？-He cant go with us. 他不能和我們一起去。而“have to”要加助動詞do , does或did才可能完成其疑問句、否定句。2) 這4個情態(tài)動詞在一般疑問句中將它們放 5. must/have to must 表示主觀“必須”；have to表示客觀客觀需要，即“不得不” 。 I dont like this TV set. I must buy a new one. This TV set doesnt work. We have to buy a new one. (now)5. must/have t

18、o You must get up at five tomorrow. We (will) have to get up early tomorrow were going to Devon. (future) I had to leave early because I wasnt feeling well. She said she must/had to see the manager. (past) You must get up at five tom 表示邀請的句型: (你能來參加我的聚會嗎?) Can you come to my party?Could you come to

19、my party?Would you like to come to my party?接受邀請:拒絕邀請:Sure, Id love/like to.Im sorry, I cant. I have to/Im V-ingTask 總結 表示邀請的句型: (你能來參加我的聚會嗎?) CaExercise 一、選擇正確的詞1.Thank you for (ask/ asking), but I cant go to the movies with you.2.Paul has to study (at/ for) the math test tonight.3.My sister has to

20、o (much/ many) homework to do.askingformuchExercise 一、選擇正確的詞askingformuch4. Can you come to my party (at/ on) Saturday night?5. She invites me (watch/ to watch) the basketball match the day after tomorrow.6. I like playing (piano/ the piano).onto watchthe piano4. Can you come to my party 二. 對話填空。每空一

21、詞，單詞的首字母已給出。A: Hey, Xiao Wang, can you go to the m_ on Saturday?B: Im s_, I cant. I have too much h_ this weekend. And Im not f_ _ well today.A: Thats too b_. Whats the matter?ovies orryomeworkad eeling二. 對話填空。每空一詞，單詞的首字母已給出。ovies oB: Im not sure. Maybe I have a c_, as Im feeling a little cold.A: I

22、think youd b_ go to the d_.B: I also t_ so. A: Maybe Im asking you to come another time.B: Sure. T_ for asking.old etter octor hink hanks B: Im not sure. Maybe I have 三、選擇題1. Can you play tennis with on Saturday ? A. us B. we C. our D. ours2. Henry his homework this afternoon. A. have to do B. have to doing C. has to do D. has to doing3. Tony is playing tennis the school team. A. on B. in C. to D. with4. Jim play soccer with his friend this weekend, because he is very busy. A. can B. cans C. cannt D. cantACBD三、選擇題ACBD5. - ? -Its October the 14th. A. When is today B. whats today C. What time i