資源簡介 / 讓學習更有效 新課備課備考 | 英語學科2025年牛津上海版(試用本)九年級英語上冊精講精練Unit 3 Pets核心語法:情態動詞一、情態動詞基本概念情態動詞是用來表達說話人態度、觀點或判斷的助動詞,具有以下特點:后接動詞原形無人稱和數的變化不能單獨作謂語沒有時態變化(除can/could, will/would等)二、常見情態動詞分類表功能 情態動詞 基本含義 否定形式能力 can/could 能夠/可以 can't/couldn't許可 may/might/can/could 可以/允許 may not/might not義務 must/have to/should/ought to 必須/應該 mustn't/don't have to推測 must/may/might/could/can't 可能/肯定 may not/might not意愿 will/would/shall 愿意/將要 won't/wouldn't三、核心情態動詞詳解1. can/could用法 例句 說明能力 I can swim. She could dance at 5. could表過去能力請求 Can/Could you help me could更禮貌許可 You can go now. 口語常用可能性 It could rain tonight. 可能性較小注意:can表示理論可能性,could表示更小的可能性回答Could...問句時用can:Could I... Yes, you can.2. may/might用法 例句 說明許可 May I borrow your pen 正式場合可能性 She may be late. It might snow. might可能性更小建議 You might try this method. 委婉建議區別:may not表示"不允許"might not表示"可能不"3. must/have to用法 例句 區別義務 You must wear a seatbelt. 主觀要求推測 He must be at home. 肯定推測必須 I have to work today. 客觀要求否定形式:mustn't表示"禁止"(You mustn't smoke here.)don't have to表示"不必"(You don't have to come.)4. should/ought to用法 例句 區別建議 You should see a doctor. 常用義務 We ought to protect nature. 語氣更強推測 They should arrive soon. 合理推測否定形式:shouldn't/ought not to四、情態動詞表推測確信程度 情態動詞 例句 時間指向100%肯定 must She must be tired. 現在/一般情況80%可能 may It may rain later. 現在/將來50%可能 might/could He might be sleeping. 現在/將來不可能 can't That can't be true. 現在/一般情況注意:對過去推測:情態動詞 + have + 過去分詞She must have left.(她肯定已經離開了)五、易錯點突破can vs. be able tocan表能力或許可be able to強調通過努力獲得的能力,可用于各種時態After training, I was able to swim.must與have to的區別must have to主觀要求 客觀要求必須做 不得不做回答may/might問句問:May I... 答:Yes, you can./No, you can't.(不用may回答)六、記憶口訣"情態動詞很重要,原形動詞后面靠;can表能力或許可,may表允許更禮貌;must強調必須做,should建議要記牢;推測用法分強弱,語境判斷不可少!"1.Polluted air and water __________ kill plants, animals, and even people.A.can B.can't C.should D.shouldn't2.—Mum, will you buy me a new iPad after the Entrance Examination —I'm afraid I ________, dear. We are short of money now.A.mustn't B.can't C.shouldn't D.needn't3.—You don't have to take a raincoat. It isn't going to rain.—Well, I am not sure. It ________ do.A.must B.need C.may D.would4.— Could I look at your picture — Yes, of course you ________.A.could B.can C.will D.would5.Nowadays all passengers go through safety check before take a train.A.can B.may C.must D.will6.— Mom, what's in the box — I am not sure. It ________ be a present from your brother.A.might B.must C.should D.will7.—Can you speak Chinese, Jeff —No, I ________.A.don't B.can't C.can8.—Wilson, _________ you help me carry the box upstairs —Sure, no problem.A.might B.must C.should D.could9.— I thought you like something to read, so I have brought you some book.— Thanks a lot.A.may B.might C.could D.must10.I'm not sure. His father in the office.A.maybe B.may be C.may D.is11.—You ________ be very happy with the good grades you've got.—Yes, you're right. I'm really excited.A.may B.can C.must D.need12.—Mum, must I stay there the whole day —No, you ________.You ________ come back after lunch if you like.A.mustn't; can B.can't; must C.needn't; may D.won't; must13.—Where are you going for your winter vacation —We go to Hainan, but we are not sure.A.must B.may C.need D.should14.—Have you seen Jack His mother is looking for him all the afternoon.—No, I haven't. I am sure mother be very worried.A.must B.may C.need D.should15.— _________ I watch TV after finishing my homework —Yes, you can.A.Must B.Need C.Could D.Should16.I am proud that our Chinese survey team ________ successfully remeasure Qomolangma, the world's highest peak.A.must B.can C.may D.need17.—____I return the books this week?—No, you ____. You can do that next week.A.Must; can't B.May; needn't C.Need; mustn't D.Must; needn't18.—You_________ be excited. You have a ticket for your favourite band!—Yes. I can't believe that I can see the band play live!A.need B.can't C.must19.—I wonder if this glass is Tom's.—It ________ be his. His was broken just now.A.mustn't B.may not C.can't D.shouldn't20.Roy be very interested in English, he spends all his spare time on it.A.must B.might C.can D.may21.The little boy feels much better so you ___________________ call a doctor.A.needn't B.can't C.shouldn't D.mustn't22.— Listen! Is Sarah singing in the neighbor room —No. It ___________ be Sarah. She has gone to Italy.A.needn't B.may C.must D.can't23. We ____ smoke in all indoor public places from March 1st, 2017.A.mustn't B.needn't C.can't D.shouldn't24.The man is feeling much better now, so you ______ call a doctor.A.can't B.mustn't C.needn't D.shouldn't25. —I think the girl under the tree is Alice.—No, it ____ be her. She is on the playground now.A.mustn't B.can't C.needn't D.may not26.—My bike is broken. _________ I borrow yours —Yes, you _________.A.Could, may B.Can, could C.Could, can27.—Many toys have been left at the picnic. I wonder if the toy truck belongs to Ruby.—It ____ be hers. She wasn't at the picnic on that day.A.will B.can't C.mustn't D.might28. —Is the girl over there Amy —It ____ be her. She has gone to her hometown with her grandma.A.needn't B.can't C.may29.I like the party so much. , but I ________ go home. It is too late.A.may B.can C.have to30.— Where are you going for your summer holiday — We ________ go to Yun Nan, but we haven't decided yet.A.should B.will C.may D.must31.—May I swim here —No, you . It's dangerous here. I suggest to the indoor swimming pool.A.can't, go B.mustn't, to go C.mustn't, going32.—Do you have any plans for this Sunday —I'm not sure. I go to the countryside to see my grandmother.A.can B.must C.may D.need33.—______ I work late this evening My daughter is home alone.—No, you needn't. You can leave the office as you wish.A. May B.Must C.Shall D.Might34.As middle school students,we ______ follow the public rules wherever we go.A.would B.should C.might D.could35.—The paper cutting is pretty lively. Who made it — It ____ be. Amy. Nobody in our class, except her is able to do it.A.might B.must. C.can't D.mustn't36.—Can I walk across the road now, mum —No, you_______. You have to wait until the light turns green.A.couldn't B.shouldn't C.mustn't D.needn't37. Listen up, guys! Everyone____wear a mask. Go and buy one if you don't have one.A.can't B.can C.mustn't D.must38.—You look pretty in green, Kate.—Thank you, I like green. Green _______ give me energy.A.can B.must C.should D.may39.—Mom, can I watch TV this evening —You ________ finish your homework first.A.can B.may C.must D.shall40.You be hungry after the long walk. Help yourself to some cakes.A.should B. must C.need to D.ought to41.—Does he need _____ there at once —No, he _______ leave so hurriedly because he has enough time.A.to go; doesn't need B.go; needn't C.to go; needn't42. —Tina, is that our math teacher Mr. Wang —It ____ be Mr. Wang. He has gone to Beijing.A.must B.mustn't C.can't D.can43.—___________ you swim —No, I___________.A.Can; can B.Can;can't C.Do;can't D.Can; don't44. —Can you play the piano —Yes, I ____. I often practise it on weekends.A.needn't B.need C.can45.—I ____ find my keys.—Have you checked in your jacket pockets A.mustn't B.shouldn't C.can't D.wouldn't46.—I hope all of you ______ my birthday party.—Well, we are willing to come.A.to come to B.can come to C.are come to D.coming to47. —Shall we go skateboarding after school —Sorry, my parents said that I ____ be at home early.A.need B.must C.may48.–My brother won the first prize in the speech competition.–Congratulations! You ______ be excited about that!A.need B.must C.would D.can49. —____ I go to the movies with Jack this evening, mom —Yes, but remember to come back early.A.Must B.Should C.Can D.Might50.As middle school students, we follow the public rules wherever we go.A.would B.should C.might D.could參考答案及試題解析1.A【解析】句意:污染的空氣和水可以殺死植物、動物甚至人。can能,可以;can't不能,不會,不可能;should應該;shouldn't不應該;根據常識,污染的空氣和水對人和植物都有害, 能做某事……,表示能力,肯定意義,用can ,故選:A。【點評】考查情態動詞,牢記情態動詞的含義和用法,進行對比,排除錯誤的答案,從而做出正確的選擇。2.B【解析】句意:——媽媽,入學考試后你會給我買一個先的iPad嗎?——恐怕不能,親愛的。我們現在比較拮據。根據We are short of money now. 可知我們不能買,沒能力買,mustn't一定不要,禁止;can't不能,表示能力;shouldn't不應該;needn't不必,故選B。【點評】此題考查情態動詞辨析。弄清情態動詞的使用規則,根據上下文的聯系選出正確答案。3.C【解析】句意: —你不必帶雨衣,不會下雨。—哦,我不確定呢。可能要下雨啊。由于I am not sure“我不確定”,所以作“可能”的推測。must一定;need需要;may可能;would將要。故答案選C。4.B【解析】句意:——我能看看你的照片嗎?——是的,當然你可以。Could I… 是客氣地征求允許的句型,其肯定回答用can。故選B。【點評】考查情態動詞,注意could的一般疑問句用,肯定句can回答。5.C【解析】句意:現在,所有的乘客在上火車之前都必須過安檢。A. can能B. may可以,C. must必須D. will要。結合現在的實際情況,可知是必須,故選C6.A【解析】句意:——媽媽,盒子里是什么?——我不確定。可能是你哥哥送的禮物。might可能;must一定;should應該;will將;根據I am not sure. 可知這里不確定,意為“可能”,故答案為A。【點評】考查情態動詞。注意識記情態動詞might的用法。7.B【解析】句意:——Jeff,你能說漢語嗎?——不,我不能。含有情態動詞的一般疑問句,在回答時要借助相應的情態動詞。在此題中,問句借助了情態動詞can,因此肯定回答借助can,否定回答借助can't,根據“No”判斷出是否定回答,故選B。【點評】考查情態動詞、一般疑問句。注意含有情態動詞的一般疑問句的回答方法。8.D【解析】句意:——Wilson,你能幫我把這個盒子搬到樓上嗎?——當然,沒問題。A.might,情態動詞may的過去式,可以;B.must,情態動詞,必須;C.should,情態動詞,應該;D.could,情態動詞can的過去式,能;根據"…… you help me carry the box upstairs?"可知此處要表達你能幫我把這個盒子搬到樓上嗎,故選D。【點評】考查情態動詞。識記情態動詞might、must、should、could的用法,根據語境選擇恰當的情態動詞。9.B【解析】句意:——我原以為你會喜歡讀點東西,所以我給你帶來一些書。 ——非常感謝。A:may可能; B:might可能,may過去式; C:could可能,不用于肯定句,只用于否定和疑問句; D: must必須,一定,肯定。根據答語 so I have brought you some book. 可知賓語從句表示推測,可能性。主句中的謂語動詞thought,可知賓語從句中也要用過去式might,故選B。【點評】考查情態動詞辨析。理解情態動詞的詞義和用法,根據語境和主句的時態確定從句的時態。10.B【解析】句意:我不敢確定。他父親可能在辦公室。情態動詞may表示推測,后面須跟動詞原形,意為“或許,可能”,與后面的be構成謂語;而maybe是副詞,意為“大概;或許”,常用于句首。is是系動詞be的一般現在式形式,此句缺少謂語,結合語境是表示推測,故答案為B。11.C12.C【解析】句意:——媽媽,我必須一整天都待在哪兒嗎?——不,你不必。如果你喜歡的話你可以在午餐后回來的。mustn't 不準,禁止;can 能,可以;can't 不可能;不能;must 必須;一定;needn't 不必要;may 可能,可以;won't 將不。must引導的一般疑問句的否定答語情態動詞用needn't,根據if you like可知你可以在午飯后回來,故選C。【點評】考查情態動詞。掌握情態動詞的使用規則,根據上下文的聯系確定所使用的情態動詞。13.B【解析】句意:--寒假你們要去哪里玩呢?-我們可能要去海南,但是還不確定。A. must 必須;B. may 可能;C. need需要;D. should應該。根據句意,故選B。14.A【解析】句意:——你看見杰克了嗎?他母親整個下午都在找他。 ——不,我沒有。我相信媽媽一定很擔心。根據“ His mother is looking for him all the afternoon.”可知,他的媽媽找了他一下午都沒找到,一定是非常擔心他,而非可能或者需要、應該,故選A。【點評】語氣詞考查題,做此類題目首先要翻譯句意,根據句意判斷語氣詞的強烈程度,然后填入相應的單詞即可。15.C【解析】句意:——我可以在完成我的作業后看電視嗎?——是的,你可以。A.Must必須,肯定回答用must;B.Need需要,肯定回答用must或have to;C.Could能,肯定回答用could;D.Should應該,肯定回答用should。根據答句和上下句句意,可知應使用Could來提問。故選C。【點評】考查情態動詞。首先弄清題干和各選項意思,識記各類情態動詞的用法,然后結合語境和上下文意思,選出正確答案。16.B【解析】句意:我很自豪我們中國調查隊能夠成功的重新測量珠穆朗瑪峰,世界上最高的山峰。must—定,必須;can能夠;may也許;need需要。根據“I am proud”及“successfully”可知空格處用“can”表示“能夠”,故選B。【點評】考查情態動詞辨析。注意識記must,can,may和need的用法區別。17.D【解析】句意:——這周我必須還書嗎?——不,你不必還。你可以下周還。情態動詞一般疑問句的否定回答,由Must I…?否定回答用No,you needn't;由May I …?否定回答用No,you mustn't/ 由Need I…?否定回答用No, you needn't,結合選項,故答案選D。【點評】考查情態動詞的辨析。注意理解句意,理解選項,根據語境選出正確的答案。18.C【解析】句意:——你一定很興奮。你有一張你最喜歡的樂隊的票!——是的。我真不敢相信我能看到樂隊現場表演!A:need,需要;B:can't,不能;C:must,必須。根據下文"Yes. I can't believe that I can see the band play live!",可知這是意料之外的事情,所以上文應該是表示"肯定的推測",所以用must。故選C。【點評】考查情態動詞辨析,注意根據語境理解詞義和句意。19.C【解析】句意:——我想知道這個玻璃杯是不是湯姆的。——不可能是他的。他的剛才摔壞了。A:mustn't禁止;B:maynot可能不會;C:cant不可能;D:shouldnt不應該。根據本空后的"His was broken just now."可知本空應填can't,表示“絕對不可能”。故答案為C。【點評】考查情態動詞,注意識記can't的用法。20.A【解析】句意:羅伊一定對英語感興趣, 他把所有的業余時間都花在這上面了。 must一定,表示肯定推測;might可能,表示可能性比較小的推測;can可能,表示推測時常用于否定句;may可能,對可能性的推測,根據he spends all his spare time on it. 可知他一定對英語感興趣,故選A。【點評】考查情態動詞辨析,掌握must表示推測性的用法。21.A【解析】句意:這個小男孩感覺好多了因此你不必給醫生打電話了。needn't不必;can't不能;shouldn't不應該;mustn't一定不要,根據 The little boy feels much better 男孩感覺好多了,可知不必找醫生了,故選A。【點評】考查情態動詞。先弄清句意確定所使用的情態動詞。22.D【解析】句意:——聽!Sarah正在隔壁房間唱歌嗎?——不,不可能是她。她已經去意大利了。A、不必要;B、可能;C、一定;D、不可能。由She has gone to Italy.可知這里要說的是“不可能是她”,故選D。【點評】考查情態動詞,注意識記needn't,may,must和can't的詞義。23.A【解析】句意:從2017年3月1日起,我們禁止在所有室內公眾場合吸煙。A禁止,B不必,C不會,不能,D不應該,根據"in all indoor public places"可知在所有室內公共場合禁止吸煙,A符合題意,故選A。【點評】考查情態動詞。注意識記常見的情態動詞的用法。24.C【解析】句意:這個男人現在感覺好多了,因此你沒有必要叫醫生。A. can't不能;B. mustn't 不準;C. needn't 不必;D. shouldn't不應該。根據句意及語境此題應選C。25.B【解析】句意:——我認為樹下的那個女孩是愛麗絲。——不, 不可能是她。她現在在操場上。A:mustn't,禁止。B:can't,不能。C:needn't,不必。D:may not,不可以。根據She is on the playground now. 可知,愛麗絲正在操場上,所以此處推測那個女孩一定不是愛麗絲 ,否定推測用can't, 故選B。【點評】考查情態動詞辨析。注意情態動詞的含義以及用法,結合語境,選出合適的答案。26.C27.B【解析】句意:——野餐時留下了許多玩具。我想知道這輛玩具卡車是否屬于Ruby。——不可能是她的。那天她沒有去野餐。A.將要;B.不可能;C.禁止;D.可能。根據She wasn't at the picnic on that day. 那天她沒有去野餐,可知玩具不可能是Ruby的,故選B。【點評】考查情態動詞,首先理解情態動詞詞義,然后根據關鍵詞句She wasn't at the picnic on that day.確定情態動詞。28.B【解析】句意:——那邊那個女孩是艾米嗎?——不可能是她。她已經和奶奶一起回家鄉了。A.不需要。B.不可能。C.可能。根據原句She has gone to her hometown with her grandma.可推知這個女孩不可能是艾米,此處表示否定推測。故選B。【點評】考查情態動詞。仔細閱讀題干理清句意并根據后面句意推出前面回答。29.C【解析】句意:我非常喜歡這個聚會。 但是我必須回家。 太遲了。may可能;can能夠;have to必須,不得不。根據It's too late可知,此處表示不得不回家。故選C。【點評】考查情態動詞辨析。弄清句意,結合句子語境,識記have to不得不,選出正確答案。30.C【解析】句意:——你暑假打算去哪兒?——我可能去云南,但是我還沒有決定。A. should應該;B. will打算,將;C. may可以;D. must必須。情態動詞的特點是后加動詞的原形,這里表示推測用may。根據題意,故選C。【點評】考查情態動詞辨析,注意理解句意,根據語境選擇合適的情態動詞。31.C【解析】句意:——我可以在這里游泳嗎?——不,你不能。這里很危險。我建議去室內游泳池。can't不能,表能力;mustn't不能,表禁止。第一空根據It's dangerous here.這里很危險,可知此處應用情態動詞否定形式mustn't“不能”;第二空根據固定搭配suggest doing sth.建議做某事,可知應用動名詞going。故選C。【點評】考查情態動詞和動名詞。注意熟記固定搭配suggest doing sth.建議做某事。32.C【解析】can 能,可以,must 必須,一定,may 可能,need 需要,由I'm not sure.可知不確定,故選意思為“可能”的may,故選C。【點評】本題考查情態動詞 may 表示推測的用法。33.B【解析】句意:——我今晚必須工作到很晚嗎?我女兒獨自在家。——不,沒必要,只要你想,你可以離開辦公室。Must I....?我必須……嗎?肯定回答: Yes, you must. 否定回答:No, you needn't.,故選B。【點評】考查情態動詞。注意Must開頭的一般疑問句的肯定和否定兩種回答的不同。34.B【解析】句意: 作為中學生,我們無論去哪里都遵守公共規則。A會,B應該,C可能,D能,根據follow the public rules可知,規則是應該遵守的,故選B。【點評】考查情態動詞,注意should的用法。35.B【解析】句意:——剪紙很生動。是誰做的?——肯定是艾米。我們班除了她之外沒有人能做到。A可能,B肯定,C不可能,D禁止,根據Nobody in our class, except her is able to do it,可知表示肯定的推測,故選B。【點評】考查情態動詞,注意識記must表示推測的用法。36.C【解析】couldn't不能;shouldn't不應該;mustn't禁止,不要;needn't不必。句意:媽媽,現在我可以橫穿馬路嗎?——不,你千萬不要。你必須等到綠燈亮時。結合語境可知選C。【點評】情態動詞的考查是初中英語考查的重點,平時學習中一定要熟記這些詞的基本詞義及用法上的不同,注意其用法及在句子中表達語氣的不同。考試中結合語境選擇合適答案。37.D【解析】句意:聽好了,伙計們!每個人都必須戴口罩。如果你沒有的話就去買一個。A:can't不能;B:can能;C:mustn't禁止;D:must必須。根據下文Go and buy one if you don't have one. 如果你沒有的話就去買一個。可知此處是指必須戴口罩,應用must,故選D。【點評】考查情態動詞,注意識記情態動詞must的用法。38.A【解析】句意——凱特,你穿上綠色看上去很漂亮。——謝謝你,我喜歡綠色。綠色能給我力量。Can有能,會的意思。故答案為A。【點評】考查情態動詞辨析,注意根據句意進行判斷。39.C【解析】句意:——爸爸,我今晚能看電視嗎?——當然,但是你必須先完成你的作業。根據當向某人表示請求做某事時,可以用Can\May開頭引導請求性的疑問句,表示“我能做……嗎 Can/MayIdo sth. ";must必須,語氣強硬,必然做某事(沒得商量的),而"finish your homework first先完成作業“這句說明在”watchTV"前必須要先把作業做完,這是必定要做的事,選項C符合句意。故選C。【點評】考查情態動詞的用法。注意掌握情態動詞can、may、must的用法。40.B【解析】should應該,可能; must必須,一定;need to需要;ought to應該.句意:在遠足之后你肯定累了吧.隨便吃些蛋糕吧.結合語境可知選B.【點評】情態動詞的考查是初中英語考查的重點,平時學習中一定要熟記這些詞的基本詞義及用法上的不同,注意其用法及在句子中表達語氣的不同。考試中結合語境選擇合適答案。41.C【解析】句意:—他需要馬上去那里嗎?—不,他不必太匆忙離開,因為他有足夠的時間。need作為實意動詞,需要,need to do sth需要做某事;作為情態動詞,必須,常用于否定形式needn't,不必。所以選C。【點評】此題考查情態動詞的用法。42.C【解析】句意:——蒂娜,那是我們的數學老師王老師嗎?——不可能是王老師。他去北京了。A.必須。B.禁止。C.不可能;不能。D.可能;可以。根據原句中is that our math teacher Mr. Wang 及He has gone to Beijing.問是不是數學老師,回答他已經去北京了且未回。可推知此處表示否定推測,即不可能是王老師。can't be在此處表示否定推測,表示肯定不是。故選C。【點評】考查情態動詞。根據句中關鍵句意判斷正確的情態動詞。43.B【解析】句意:——你會游泳嗎?——不,我不會。Can you do sth 你會做某事嗎?根據No可知此處用否定回答,故為can't,故選B。【點評】考查情態動詞can的一般疑問句及其否定回答。44.C【解析】句意:—你會彈鋼琴嗎?—是的,我會,我經常周末彈鋼琴。A,我不必;B;我需要;C,我會。根據問句Can you play the piano 你會彈鋼琴嗎?和回答Yes是的,可知此處為肯定回答,I can我會,故選C。【點評】考查情態動詞,注意情態動詞can構成一般疑問句肯定回答的正確方式。45.B【解析】句意:我應該找不到我的鑰匙。您檢查過您的夾克口袋了嗎?A禁止,B應該不,C不可能,D不會,根據Have you checked in your jacket pockets,可知表示猜測,故用shouldn't,故選B。【點評】考查動詞辨析,注意識記shouldn't的用法。46.B【解析】句意:——我希望你們都能來參加我的生日聚會。——噢,我們都愿意來。A. to come to是動詞不定式;B. can come to是情態動詞+動詞原形,可以做謂語;C. are come to 動詞be和實意動詞come表示打算要做某事;D. coming to是動名詞。根據句意可知,hope后跟that引導的賓語從句,該賓語從句缺少謂語動詞。故選B。【點評】考查情態動詞。注意情態動詞+動詞原形在句中作謂語。47.B【解析】句意:放學后我們去玩滑板好嗎?—不好意思,我的父母說我必須早點回家。A,需要;B,必須;C,可能。根據my parents said我的父母說,并結合語境,此處應使用情態動詞must必須,表示父母要求自己必須早點回家,故選B。【點評】考查情態動詞,注意情態動詞must表示必要或很重要的正確使用。48.B【解析】句意:——我兄弟在演講競賽中得了一等獎。——恭喜!你一定對那感到很興奮。must be 一定,對現在進行肯定的猜測。故選B。【點評】考查情態動詞。49.C【解析】句意:——媽媽,今晚我能和杰克一起去看電影嗎?——可以,但記得早點回來。must必須;should應該;can可以;might可能。根據"I go to the movies with Jack this evening"可知此處是請求許可,用can。故選C。【點評】考查情態動詞辨析。注意:仔細閱讀題目中的句子,理解其整體意義和語境。在句子中找出情態動詞,并判斷其可能的含義和用法。逐一分析選項中的情態動詞,判斷其是否與句子的語境和邏輯相符。根據句子的語境和邏輯關系,排除不符合題意的干擾項。在排除干擾項后,選擇最符合句子語境和邏輯的情態動詞作為答案。50.B【解析】句意:作為中學生,無論走到哪里我們應該遵守公共規章制度。would將會,指將會發生的事情;should,應該,主要用于告訴某人應該做什么、給予忠告或加強語氣。might,可能,事情發生的可能性;could,能,表示委婉語氣;此處表示應該做的事情,故選B。【點評】此題考查情態動詞辨析。根據上下文的聯系確定所使用的情態動詞。21世紀教育網(www.21cnjy.com) 展開更多...... 收起↑ 資源預覽 縮略圖、資源來源于二一教育資源庫