情態(tài)動詞用法及練習(xí)

1、情態(tài)動詞用法及練習(xí)1情態(tài)動詞的語法特征1）情態(tài)動詞不能表示正在發(fā)生或已經(jīng)發(fā)生的事情，只表示期待或估計某事的發(fā)生。2）情態(tài)動詞 除ought（to） 和have （to）夕卜，沒有人稱，數(shù)的變化，即情態(tài)動詞都用原形，情態(tài)動詞后面跟的動詞也用原形。2 can 和口 could1）can表示能力；可能，注意：could不表示時態(tài)I can swim.提岀委婉的請求，用could （注意在回答中不可用could）-Could I have the TV on? - Yes, you can. / No, you can't.2）在否定，疑問句中表示推測或懷疑，用could.He could n

2、't be a bad man.他不大可能是壞人。3比較may和might表示允許或請求；表示沒有把握的推測；may放在句首，表示祝愿May God bless you! He might be at home.注意：might表示推測時，不表示時態(tài)。只是可能性比may小典型例題 Petercome with us tonight, but he isn't 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岀。4 比較 have to 和口 must1） 兩詞都是必須的意思，have to 表示

3、客觀的需要，must表示說話人主觀上的看法，既主觀上的必要我弟弟病得My brother was very ill, so I had to call the doctor in the middle of the ni ght. 很厲害，我只得半夜里把醫(yī)生請來。(客觀上需要做這件事)He said that they must work hard.2) have to有人稱、數(shù)、時態(tài)的變化，而He had to look after his sister yesterday.3) 在否定結(jié)構(gòu)中：don't have toYou don't have to tell him a

4、bout it.You must n't tell him about it.他說他們必須努力工作。（主觀上要做這件事） must只有一種形式。表示"不必"mustn't表示"禁止"，你不一定要把此事告訴他。你一定不要把這件事告訴他。5表示推測的用法can, could, may, might, must皆可表示推測，推測的否定形式，疑問形式用can't, could n't 表示Mike can't have found his car, for he came to work by bus this morni

5、ng.邁克一定還沒有找回他的車，因為早上他是坐公共汽車來上班的。注意：could, might 表示推測時不表示時態(tài)，其推測的程度不如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?表示肯定含義的請求勸說時，疑問句中一般用some 而不是anyWould you like some cake?3）否定結(jié)構(gòu)中用 will ，一般不用 would, wo n't you

6、是一種委婉語氣Won't you sit down?7情態(tài)動詞的回答方式問句肯定回答Need you ?Yes, I must.Must you ?否定回答No,I need n't/don't have to.情態(tài)動詞專練一、Read and choose.（根據(jù)上下文選岀正確的單詞，使對話意思合理、完整，每空1分，共10分。）（away, do, meals, brother, family, wash, can, make, housework, can）My n ame is Ann. I have a happy. We share the. My fathe

7、rcook the. My mother can the clothes. I can put the clothes. My sister the dishes. Mycanthe bed.二、Read and finish the dialogue.（根據(jù)上下文意思，將對話內(nèi)容補(bǔ)充完整，10分。）A: Excuse me!?B: I ofte n help my mother do housework on weeke nds.A:?B: I can wash the clothes.A:?B: No, I can 'cook the meals. But.A: Great! Yo

8、ur mother is helpful.?B: My favourite food is chicken. My mother often cooks it.A: Thank you.B: You are welcome.三、Write the sen te nces.（根據(jù)上下文或提示，寫岀句子。共10分）1. A:?B: The mon key can water the flowers.A:!2. A:?B: Yes, the rabbit can sweep the floor.3. A: Can you set the table?B:. But I'd like to h

9、ave a try.4. A: Are you helpful at home?B:.（肯定回答）四、Read and choose（閱讀下面的短文，選擇最適合的答句，并將其字母編號填在題前的括號內(nèi)。每小題2分，共10分。）It 's Sun day today. I stay at home with my pare nts. 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 flo

10、or. My mother will cook the meals and wash the clothes. After meals, I will clean the table and wash the dishes.It 's a busy day for us. But we are very happy.（）1. What can you do after meals?A. I can make the bed and clea n the bedroom.B. I am helpful.C. I can clea n the table and wash the dish

11、es.（）2. Can your mother water the flowers?A. Yes, she can. B. No. C. No, she can'.（）3. Can you go to school today?A. I stay at home with my pare nts.B. Yes, I ca n.C. No, I ca n'.（）4. Are you happy today?A. Yes, I am. B. Yes, I ca n. C. No, I ca n'()5. What ca n 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：對畫線部分提問：2. Chen Jie can swim.