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1、【易錯考點回顧】must和have to【易錯點睛】1. 表示必須此時可用于肯定句、否定句或疑問句,用于否定句時,mustnt的意思是“一定不要、不能”。如:you must finish the work tonight. 你必須今晚完成這項工作。 adverbs mustnt be put between the verb and the object. 副詞不能放在動詞和賓語之間?!咀⒁狻繉τ趍ust開頭的一般疑問句,若作否定回答,可以用neednt,不能用mustnt。如:must i clean all the rooms? 這些房間我都得清掃嗎?no, you neednt. 不,

2、不必。2. 表示推測意為“一定是”,通常只用于肯定句,表示有把握的肯定推測。如:janes light is on. she must be at home. 簡的房間里開著燈。她一定在家。3. must與have to的區(qū)別must側重于說話者的主觀看法,認為有必要或有義務去做某事everyone must keep the law. 人人都要守法。have to 則重于客觀需要,含有“不得不”“被迫”之意the last train has gone. well have to walk home. 最后一班車已經(jīng)開了,我們得走回家了。從時態(tài)方面看,must 只有現(xiàn)在時一種形式,而have

3、 to則有多種時態(tài)形式。如:you will have to show your papers at the gate. 在大門口你得出示證件。【典型錯題】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【錯因分析】本題的關鍵是對語境的理解,對句意的把握會直接影響能否正確判斷空格處所缺情態(tài)動詞的意思。其次,如果沒有掌握選項中四個情態(tài)動詞的用法,也會影響正確作答?!舅悸伏c撥】首先

4、要理解題干中句子的意思,然后弄清楚四個選項中情態(tài)動詞的用法,再結合句意判斷空格處要表達的是肯定推測“一定是”,再結合選項得出正確答案?!菊_答案】正確答案為c。句意:如果你對爸爸去哪兒了這個著名的節(jié)目一無所知,那你一定是生活在盒子里。根據(jù)上文提示此空是表示肯定的推測,“一定是”要用情態(tài)動詞must,故選c。【中考鏈接】 1. (2019 重慶)you _ stop when the traffic lights(交通燈) turn red.a. can'tb. may c. mustd. needn't【答案】c解析:句意:交通燈變紅時你_停車。a. cant不能,b. may

5、可能,c. must必須,d. needn't不必,根據(jù)句意,答案選c。 2. (2019 福建) mum, may i go swimming now?yes, dear, but remember that you _ go with your dad.a. mayb. canc. must【答案】c解析:句意:媽媽,我現(xiàn)在可以去游泳嗎?是的,親愛的,但是記住你必須和你爸爸一起去。may可以;can可能;must必須。根據(jù)語境可知這里用must。故選c。3. (2019 黔西南州)must i leave now? its still raining hard outside.no

6、, you _.you can wait till the rain stops. a. dont have tob. couldntc. cantd. shouldnt【答案】a解析:句意:我必須現(xiàn)在離開嗎?外面還在下雨。不,你不必你可以等到雨停。don't have to不必;couldn't不能;cant不能;shouldnt不應該。在回答以must開頭的一般疑問句時,肯定回答用yes, sb. must,否定回答用no, sb. needn't或don't have to,結合句意,答案選a。【闖關提分訓練】must和have to1. can you

7、go shopping with us this afternoon?sorry, i cant. i _ look after my little sister.a. can b. may c. have to2. may i smoke here?no, you _. this is a no-smoking room.a. neednt b. mustnt c. need d. wouldnt3. someone is knocking at the door. it _ be my mother. its time for her to be back.a. can b. may no

8、t c. must d. mustn't4. you _ take me to the station. my brothers taking me. a. cant b. mustnt c. shouldnt d. dont have to5. sorry, miss liu. i left my workbook at home. must i hand it in(上交它) today? no, you _. you _ bring it here tomorrow.a. mustnt; should b. cant; must c. mustnt; may d. neednt;

9、 can6. excuse me, sir, visiting hours(探視時間) are over. you _ leave.pardon me(對不起), nurse. i didnt hear the bell(鈴聲).a. may b. can c. must d. need7. the children _ play basketball on the road.a. cant b. can c. mustnt d. must8. you _ go and see a doctor at once because you got a fever(發(fā)燒). a. can b. mu

10、st c. dare d. would9.mum, must i finish the homework now?no, you _.you can do it after supper.a. needn'tb. mustn't c. can'td. may not10. (2019 鹽城一模)sorry! i can't follow you. i _ finish my homework first.a. can b. may c. must d. could11. (2019·濟南三模) must i answer the question in

11、 english?no, you _. a. can'tb. mustn't c. needn't d. shouldn't12. yesterday it rained heavily when school was over. we _ stay in our classrooma. mustb. shouldc. had tod. need13. i cant go with you. i _ stay at home until my parents come back.a. canb. mayc. mustd. could14.must i finis

12、h the work today?no, you _. but you _ finish it next monday. a. mustnt; mustb. neednt; mustc. mustnt; couldd. neednt; could15. _ you _ wear your sports shoes for p.e. class?yes, we do.a. have; tob. do; havec. do; have tod. does; have to16. may i go out now, dad?well, you _ finish your school work fi

13、rst.a. canb. mayc. needd. must17. why cant nancy come to your party?because she _ do her homework.a. canb. cantc. has tod. doesnt have to18. (2019 河西區(qū)一模) mike _ finish the work at once. he can finish it tomorrow.a. must b. have to c. shouldn't d. doesn't have to 19. we shouldn't arrive late for class. we _ be on time.a. mustb. mayc. couldd. can20. it i

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