ID: 21524403

must与have to的区别 知识梳理与专项练习(含答案)

日期:2024-12-14 科目:英语 类型:小学试卷 查看:41次 大小:28618B 来源:二一课件通
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must与have to的区别 知识梳理与专项练习知识梳理 must与have to在英语中都表示“必须”的意思,但他们之间存在一些基本区别。 1.含义的区别: must:必须(主观),表示主观上的强烈意愿或命令,强调个人主观的决定或判断。 have to:不得不(客观)表示由于某种外部情况或条件而必须采取行动,强调客观必要性。 2.时态的区别: must:没有时态变化,只有现在时一种形式 (在宾语从句中可以表示过去)。 例:He said she must go with me. 他说她必须同我一起去。 have to:随时态变化而变化,通过助动词来体现。 例:现在时态下,have to可以表达为“have to do”,而must则为“must do”。 3.肯定句的区别: must:must do have to:have/has/had to do, will have to do 4.否定式意义的区别: must:must的否定形式must not=mustn't,表示“一定不要、不允许、禁止、不准。”逾期不交强烈。在回答 must 的问句时, 肯定形式用 must 来回答 但否定形式用needn't 或don't have to 来回答。而不用 mustn't来回答。 例:You mustn't tell him about it. 你一定不要告诉他这件事。(这可能是秘密)。 -Must I be home before 8 o'clock ( 8 点之前我必须回家吗 ) -Yes, you must. 是,你必须。 -No, you needn't. /No, you don't have to. 不,你不必。 have to:与否定词not连用,表示“不必”或“不需要”的意思don't/ doesn't /didn't/won't have to do 例:I don't have to go我不必去。 5.表示对过去的推测意义时的区别: must:直接使用过去时态。 例:They must go他们必须走。 have to:使用过去完成时态。 例:They must have gone他们一定已经走了。 专项练习 一、选择题。 1.-Listen! Is Professor Li giving a speech in class -No, it _____ be him. He has gone to France. A. may not B. mustn't C. needn't D. can't 2. -Will you answer the telephone -Sorry. It _____ be your mother. A. can; mustn't B. may; won't C. may; can't D. need; will 3. Four hundred dollars for a pair of shoes, you _____be joking! A. may B. can C. need D. must 4. I'm sorry. I _____ go now. My father told me on the phone that my mother was ill. A. can B. may C. have to D. think 5.-May l put my bike here -No, you _____.You should put it over there. A. couldn't B. needn't C. mustn't D. won't 6. If you know nothing about the famous program called Where are we going, dad You _____ be living in a box! A. would B. can C. must D. need 7.-Can you go shopping with us this afternoon -Sorry, l can't. I _____look after my little sister. A. can B. may C. have to D. need 8.-May l smoke here -No, you _____. This is a no-smoking room. A. needn't B. mustn't C. need D. wouldn't 9. Someone is knocking at the door. It _____be my mother. It's time for her to be back. A. can B. may not C. must D. mustn't 10. You _____take me to the station. My brother's taking me A. can't B. mustn't C. shouldn't D. don't have to 11. -Sorry, Miss Liu. I left my workbook at home. Must l hand it in(上交它) today -No, you _____. You _____bring it here tomorrow A. mustn't; should B. can't; must C. mustn't; may D. needn't; can 12. The children _____ play basketball on the road. A. can't B. can C. mustn't D. must 13. You _____ go and see a doctor at once because you got a fever(发烧). A. can B. must C. dare D. would 14. -Mum, must l finish the home ... ...

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