情態(tài)動(dòng)詞用法及練習(xí)

1、情態(tài)動(dòng)詞用法及練習(xí)1情態(tài)動(dòng)詞的語法特征 1） 情態(tài)動(dòng)詞不能表示正在發(fā)生或已經(jīng)發(fā)生的事情，只表示期待或估計(jì)某事的發(fā)生。2） 情態(tài)動(dòng)詞 除ought(to) 和have (to)外， 沒有人稱，數(shù)的變化，即情態(tài)動(dòng)詞都用原形,情態(tài)動(dòng)詞后面跟的動(dòng)詞也用原形。 2 can 和could1）can 表示能力；可能 , 注意：could不表示時(shí)態(tài) I can swim.提出委婉的請(qǐng)求，用could（注意在回答中不可用could）。 - Could I have the TV on? - Yes, you can. / No, you cant.2）在否定，疑問句中表示推測(cè)或懷疑,用could.He coul

2、dnt be a bad man. 他不大可能是壞人。3 比較may和might 表示允許或請(qǐng)求；表示沒有把握的推測(cè)；may 放在句首，表示祝愿。May God bless you! He might be at home.注意： might 表示推測(cè)時(shí)，不表示時(shí)態(tài)。只是可能性比may 小。典型例題 Peter _come with us tonight, but he isnt very sure yet. A. mustB. may C. can D. will 答案B. 表可能性只能用may.此句意可從后半句推出。 4 比較have to和must 1)兩詞都是必須的意思，have to

3、 表示客觀的需要， must 表示說話人主觀上的看法，既主觀上的必要。My brother was very ill, so I had to call the doctor in the middle of the night.我弟弟病得很厲害，我只得半夜里把醫(yī)生請(qǐng)來。(客觀上需要做這件事)He said that they must work hard. 他說他們必須努力工作。（主觀上要做這件事） 2)have to有人稱、數(shù)、時(shí)態(tài)的變化，而must只有一種形式。 He had to look after his sister yesterday.3） 在否定結(jié)構(gòu)中： dont have

4、to 表示不必mustnt表示禁止， You dont have to tell him about it. 你不一定要把此事告訴他。 You mustnt tell him about it.你一定不要把這件事告訴他。 5 表示推測(cè)的用法 can, could, may, might, must 皆可表示推測(cè)，推測(cè)的否定形式，疑問形式用cant, couldnt表示。Mike cant have found his car, for he came to work by bus this morning.邁克一定還沒有找回他的車，因?yàn)樵缟纤亲财噥砩习嗟?。注意：could, might

5、表示推測(cè)時(shí)不表示時(shí)態(tài)，其推測(cè)的程度不如can, may。 6 will和would 注意： 1）would like； Would like to do = want to 想要，為固定搭配。 Would you like to go with me?2）Will you?Would you like? 表示肯定含義的請(qǐng)求勸說時(shí)，疑問句中一般用some, 而不是any。 Would you like some cake?3）否定結(jié)構(gòu)中用will，一般不用would, wont you是一種委婉語氣。 Wont you sit down? 7 情態(tài)動(dòng)詞的回答方式 問句肯定回答否定回答Need y

6、ou?Yes, I must.No,I needntMust you?/dont have to. 情態(tài)動(dòng)詞專練一、Read and choose.（根據(jù)上下文選出正確的單詞，使對(duì)話意思合理、完整，每空分，共10分。）(away, do, meals, brother, family, wash, can, make, housework, can)My name is Ann. I have a happy _. We share the _. My father _ cook the _. My mother can _ the clothes. I can put _ the cloth

7、es. My sister _ _ the dishes. My _ can _ the bed.二、Read and finish the dialogue.（根據(jù)上下文意思，將對(duì)話內(nèi)容補(bǔ)充完整，10分。）A: Excuse me! _?B: I often help my mother do housework on weekends.A: _?B: I can wash the clothes.A: _?B: No, I cant cook the meals. But _.A: Great! Your mother is helpful. _?B: My favourite food

8、is chicken. My mother often cooks it.A: Thank you.B: You are welcome.三、 Write the sentences.（根據(jù)上下文或提示，寫出句子。共10分）1. A: _? B: The monkey can water the flowers. A: _!2. A: _? B: Yes, the rabbit can sweep the floor.3. A: Can you set the table? B: _. But Id like to have a try.4. A: Are you helpful at hom

9、e? B: _.(肯定回答) 四、Read and choose（閱讀下面的短文，選擇最適合的答句，并將其字母編號(hào)填在題前的括號(hào)內(nèi)。每小題分，共10分。）Its Sunday today. I stay at home with my parents. I want to help them do housework. I will(將要) make the bed and clean the bedroom. My father will water the flowers and sweep the floor. My mother will cook the meals and wash

10、 the clothes. After meals, I will clean the table and wash the dishes. Its a busy day for us. But we are very happy.( ) 1. What can you do after meals? A. I can make the bed and clean the bedroom. B. I am helpful. C. I can clean the table and wash the dishes.( ) 2. Can your mother water the flowers?

11、 A. Yes, she can. B. No. C. No, she cant.( ) 3. Can you go to school today? A. I stay at home with my parents. B. Yes, I can. C. No, I cant.( ) 4. Are you happy today? A. Yes, I am. B. Yes, I can. C. No, I cant.( ) 5. What can your father do? A. He can cook the meals and wash the clothes. B. I can water the flowers and sweep the floor. C. He can sweep the floor and water the flowers.五 句型轉(zhuǎn)換. 1. I can cook the meals. 否定句: 一般疑問句: 肯 否回答: 對(duì)畫線部分提問: 2. Chen Jie can swim. 否定句: 一般疑問句: 肯 否回答: 對(duì)畫線部分提問: 3. I would like to have some rice. 否定句: 一般疑問句: 肯 否回答: 對(duì)畫線部分提問: 4. He m