2011高考英语备考课件：语法专题(四)情态动词

课件104张PPT。2011高考英语备考课件：语法专题(四)情态动词
一、情态动词的基本含义
1．表示能力用can，could，be able to。
注意：can与be able to常可互换，但也有不可互换的情况：
①can可用于人或物作主语的句子中，但be able to只能由有生命的名词作主语。
②can只有一般现在时和一般过去时(could)，但be able to可以用于一般现在时、一般过去时、将来时、完成时。还可用于非谓语动词短语。③be able to用于过去时表示经过一番努力才能做到，一般用肯定句和疑问句，不能用could代替。如：
After doing more practice，he was able to speak English at the meeting.做了更多的练习之后，他能在会上说英语了。这样考过
①(2007·东城)We________finish it ahead of time，though it was such a tough task.
A．could　　　　　　　 B．would
C．were able to D．ought to
解析：根据后文中tough可知所填词表示“(经过努力后)能……”，应该用be able to，因此C项正确。
答案：C②(2008·湖南)You don't have to know the name of the author to find a book.You ________ find the book by the title.
A．must B．need
C．can D．would
解析：句意：你没有必要一定要通过作者的姓名来找到一本书。你可以根据这本书的标题(书名)来找到这本书。must必须，一定；need有必要；can可以，能够；would会(表示过去将来)。根据句意，只有C选项符合题意。
答案：C
③(2007·湖南)The biggest problem for most plants，which________just get up and run away when threatened，is that animals like to eat them.
A．shan't B．can't
C．needn't D．mustn't
解析：shan't 不愿意；can't 不能，不可能；needn't 没有必要；mustn't 不允许，禁止。句意：大部分植物当受到威胁的时候不能站起来逃跑，所以对它们来说最大的问题是动物喜欢吃它们。
答案：B2．表示可能性注意：①can，could，may，might可能性依次减少。②can表示理论上的可能性，指某事或情况可能发生，但并不说明实际上真会发生；如要表达某事发生的实际可能性，要用may，could或might等：
Anybody can make mistakes.任何人都可能犯错误。这样考过
④(宁波两地联考)He ________ the test again；in that case，his mother will be very disappointed.
A．should fail B．must have failed
C．might fail D．could have failed
解析：由句意知“他可能会考试又不及格；那样的话，他妈妈会很伤心。”might表推测，表示不太确定，故选C。
答案：C⑤(2008·浙江)You ________ be hungry already—you had lunch only two hours ago!
A．wouldn't B．can't
C．mustn't D．needn't
解析：句意：你不可能已经饿了——你两个小时前才吃的午饭。can't“不可能”；mustn't意为“绝对不可，被禁止”。
答案：B⑥(北京朝阳区)—Will Helen get disappointed if I tell her she failed?
—I think she ________.
A．may B．has to
C．should D．need
解析：据句意：——如果你告诉海伦她考试没过，她会失望吗？——我认为她可能会。may“可能”，用来表示推测。
答案：A⑦(潍坊质检)My mother is a great cook and we ________ never get enough of her cookies.
A．may B．need
C．should D．can
解析：由句意“……好厨师，她做的甜饼我们永远吃不够。”知选D“能够”，表示推测。may也可表示推测，但语气较弱。
答案：D⑧(北京丰台区)—It's supposed to rain tomorrow.
—I know，but the forecast ________ be wrong.Weather forecasts are far from 100 percent accurate.
A．must B．could
C．should D．will
解析：此处需表达的意思为“可能”，只有B项符合题意。
答案：B3．表示许可　注意：①在会话中，用could和might征求许可，表示语气委婉。②给予许可时也可以使用其他委婉用语，如sure，certainly，go ahead，please等。这样考过
⑨(宁波质检)—Mr Smith，________ he have all these letters typed for you right away?
—He ________.They should be ready by 10 o'clock this morning.
A．will; must B．shall; has to
C．need; will D．would; ought to
解析：shall用于一、三人称的疑问句中表示征求对方意见。
答案：B⑩(江西师大附中)—________ I book a table for dinner a few days ahead of time?
—Yes，you ________.The restaurant is always full，especially during the holidays.
A．Must; will B．Must; can
C．Shall; shall D．Shall; must
答案：D?(2008·成都)If you think the price of pork is too high，you ________as well buy some beef.It depends on you!
A．should B．will
C．would D．may
解析：may/might as well是固定用法，表示“不妨，倒不如”。
答案：D4．表示建议可用can，may，will，would，you'd better(not)等。
这样考过
?(北京东城区)—I feel bored with nothing interesting to do.
—You ________ watch TV.There will be a very good Hollywood film on this evening.
A．need B．could
C．would D．shall
解析：上文提出没事可干很烦。下文提出建议，你可以看电视啊，could在此处表示提建议，would是指习惯性的动作，shall表示威胁的语气，need 需要。
答案：B可能这样考
?You________phone him if you want to，but you ________.He'll surely phone you.
A．may; mustn't B．have to; needn't
C．might; won't D．can; needn't
解析：根据题意，第一个空须填“可以”，用may或can皆可，从后句可以判断“你没有必要给他打电话”，第二个空只能填needn't。
答案：D5．表示义务、命令、要求等用must，have to，should，ought to等，意为“必须，应该”
这样考过
?(四川)—I don't care what people think.
—Well，you ________.
A．could B．would
C．should D．might解析：句意：——我不在乎人们想什么。——不对，你应该在乎。根据语境，后半句中省略了一些与前句相同的内容。该题目实际上考查了情态动词的用法。should用以表示义务或责任，如：You shouldn't drink and drive.你不应该喝酒后开车。
答案：C
?(湖南)—It's the office！So you ________ know eating is not allowed here.
—Oh，sorry.
A．must B．will
C．may D．need
解析：句意：——这是办公室！——所以你必须知道这里不许吃东西。——噢，对不起。must“必须”，在此处语气最强烈。
答案：A?(2008·海淀)—Please carry a cellphone to make it easier for me to get hold of you.
—OK，Dad.But I am eighteen.You ________ worry so much.
A．can't B．mustn't
C．shouldn't D．wouldn't
解析：说话人认为自己不再是小孩子了，对方“不应该”再如此担心。
答案：C注意：①must的否定形式是need not(不必，没有必要)，不用must not(禁止)。②should还表示吃惊，不耐烦，不相信等。?(海淀)The purpose of education ________ be to provide students with a value system—not to prepare them for a specific job.
A．will B．should
C．could D．may
答案：B6．表示意愿和决心用shall，will，would，would rather。
(1)shall表示说话人的强烈意志，有“命令，警告，允诺，威胁”等含义，因此用于第二、第三人称。
这样考过
?(2008·北京)John promised his doctor he ________ not smoke，and he has never smoked ever since.
A．might B．should
C．could D．would解析：句意：约翰答应他的医生不再吸烟了，且从那时起就再也不吸了。might not可能不；should not不应该；could not不可能(推测)，不能(表能力)；would有“决心、决意”等意思。根据句意，可知D项正确。
答案：D?(合肥一六八中联考)—Hello，Peter.Would you please go shopping with me after school?
—Sorry.Our school is a boarding school.In school days nobody ________ go out of school without the head teacher's permission.
A．will B．can
C．may D．shall
解析：据句意“我们学校是寄宿制学校，没有班主任的允许任何人不得离校。”知这是学校的规定。规定、规则或法律条文用情态动词shall，表示“命令、警告、允诺、威胁”等意义，故选D。其他选项无此用法。
答案：D?(北京东城区)After the bell rings，which indicates the ending of the exam，you ________ stay where you are until all your papers are collected.
A．shall B．would
C．Will D．can
解析：shall表示说话者的命令、意图等。意为“一定”。
答案：A(洛阳统考)They want to take possession of my house，but they ________ not have it.
A．shall B．must
C．would D．need
解析：shall表示强烈的意志，也表示说话人的意图，决心。句意为：他们想占有我的房子，但是他们不会得逞的。
答案：A(2)will可以用于各种人称，表示意愿。
这样考过
(江西吉安一中)If you ________ let me pay for the bill today，then at least allow me to drive you home.
A．shouldn't B．needn't
C．won't D．mustn't
答案：C(2006·重庆)—Mr.Gordon asked me to remind you of the meeting this afternoon.Don't you forget it!
—OK.I________.
A．won't B．don't
C．will D．do
解析：句意：别忘了开会的事呀。好的，我不会的。注意情态动词的语气。
答案：A特例：will的主语若是无生命的东西，则表示它本身的一种特性或自然属性；won't则表示失去某种功能，意为“不起作用，就是不……”如：
Oil will float on water.油会浮到水面上。
Though he tried hard，the door wouldn't open.
尽管他费尽了力气，门就是不开。(3)would rather意为“宁愿”。
这样考过
(2008·山东寿光现代中学)—I didn't go to the museum yesterday.
—Yes，but I would rather you ________ there too.
A．went B．had gone
C．should go D．would have gone解析：would rather后跟句子时，要用虚拟语气，如果是与现在或将来相反从句要用过去时；如果与过去时相反则用过去完成时。根据上一句中的时间状语看应该表达的是与过去相反的虚拟语气，所以要用过去完成时。
答案：B
还可能这样考
—Would you like to have a taxi?
—No，I________walk there.It's such a lovely day.
A．can B．ought to
C．had better D．would rather
解析：根据最后一句“It's such a lovely day(天气这么好)”，判断前一句应是“我宁愿步行去那”，用would rather表示自己的意愿。其他项不能表示此意，故选D。
答案：D7．would或“used to＋动词原形”表过去的习惯。
(1)在表示过去重复的习惯时，used to可用would代替。
这样考过
(2007·郑州)I tried to get through to her，but she simply________not turn on her cellphone as she was busy.
A．could B．might
C．would D．should解析：此处所填词表“习惯”。而情态动词中只有will，would和used to表“习惯”，其中will表“经常性的习惯”，would和used to表“过去的习惯”，而would与used to的区别是：used to表过去有而现在已经没有了的习惯，即表过去与现在对比；而would只表过去的习惯，不涉及现在。根据句意，此处用would。
答案：C(2)used to强调过去的行为同现在的对比，含有“过去怎样，而现在却不这样了”的含义；而would则单纯表示过去的习惯性动作，常同often，every day等连用。
She isn't what she used to be.她跟过去不一样了。(表示对比，不可用would)
We would sit in the yard every evening and listened to his story.我们每天晚上坐在院子里，听他讲故事。(表示过去的重复性行为)可能这样考
Mother________us stories when we were young.
A．used to tell B．used to telling
C．would tell D．will tell
解析：本句中有确定的时间段when we were young，因此要用would。
答案：C(3)表示过去的状态，只能用used to，不可用would。
There used to be a park here.以前这里有一个公园。
可能这样考
He________a waiter，but now a taxi driver.
A．would be B．used to be
C．could be D．should be
解析：根据题意可知他过去是个侍者，而现在不是了，是一个出租车司机，因此要用used to be。
答案：B8．dare和need的用法
(1)dare的用法：情态动词dare主要用于疑问句与否定句中，后接动词原形(不带to)，没有人称和数的变化，但过去式为dared；dare也可以用作行为动词，后跟to do不定式。
可能这样考
—Miss White has decided to explore in the forest by herself.
—She________ask her boyfriend to if she________go walking in the forest.A．needn't to; dares to
B．doesn't need; dares
C．need not to; dare to
D．needn't; dare
解析：本题考查need和dare作情态动词的用法。
答案：D—There is a lot of smoke coming out of the teaching building there.
—Really？It ________be a fire，most probably.
A．ought to B．can
C．have to D．must
解析：表示推测，依据most probably，语气应为“应该”。
答案：A(2)need的用法：need作情态动词时。没有人称时态的变化，后接动词原形，多用于疑问句或否定句中；need也可用作行为动词，后接名词、代词或带to的不定式。
这样考过
(2007·长沙)Generally，reporters take positive lines.They do point out a few problems that we________aware of，but there's nothing worrying.
A．need to B．need
C．need be D．need to be解析：need用作情态动词时，主要用于否定句，疑问句和条件从句中，后跟动词原形；need用作行为动词时，用于肯定、否定和疑问句，后跟名词、代词、动词不定式或动词v-ing形式(用v-ing主动形式表示被动意义)。此处是肯定句，故need用作行为动词，后跟动词不定式；be aware of“知道”，因此选D。
答案：D
(2010·淄博上学期期末)In fact, you ________ go outside at all. There’s a supermarket just downstairs.
A．couldn't B．mustn't
C．needn't D．shouldn't
答案：C(2007·江西九所)—I didn't go to work today.
—You________；it is Sunday.
A．didn't need to B．mustn't have
C．can't have D．needn't have
解析：一般情况下，动词不定式可省略to后的成分，而动词不定式本身的标志词to不能省略。
答案：A二、情态动词表示推测
1．情态动词用于对现在和过去的推测。注意：①在表示推测时，can不用于肯定句，may不用于疑问句。②should可用于表将来的推测。这样考过
(成都检测)I can't find Mr.Li anywhere in the office building.Where ________ he have gone?
A．must B．could
C．should D．would
解析：could have done“有可能做了某事”，用于推测时，常用在否定句中和疑问句中；must have done“肯定是做了某事”，用于肯定推测，用在肯定句中；should have done“该做某事而事实上未做”；would have done“将有可能做”。据句意知：他有可能去了哪里呢？综上，选B。
答案：B
(重庆)—Hi，Tom.Any idea where Jane is?
—She ________ in the classroom.I saw her there just now.
A．shall be B．should have been
C．must be D．might have been
解析：句意：——嗨，Tom，知道Jane在哪儿吗？——她肯定在教室里。我刚才在那儿看到她了。从对话中可以看出该空是对现在情况的较肯定的猜测。
答案：C(2008·重庆)—I can't find my purse anywhere.
—You ________ have lost it while shopping.
A．may B．can
C．should D．would
解析：句意：——我到处都找不到我的钱包。——你可能在购物的时候弄丢了。根据句意首先排除C、D两项；can表“实际”的可能性时，只能用于否定句、疑问句，故被排除；A项表“推测”时常用于肯定句。
答案：A(北京西城区)There ________ be any difficulty in passing the oral test since you have practiced a lot in school.
A．mustn't
B．shan't
C．shouldn't
D．needn't解析：由句中“since you have practiced a lot in school”即“既然你在学校进行了大量的训练”推知“应该”是不会有什么困难。should表推测“按常理推测”。故选C。
答案：C
(上海)It ________ have been Tom that parked the car here，as he is the only one with a car.
A．may B．can
C．Must D．should
解析：句意：一定是汤姆把车停在这里的，因为只有他有车。此句为强调句型，谓语动词为must have been，用must表示语气肯定的推测。must have done表示“(过去)一定做了某事”。
答案：C(南通调研)—John，how did your English exam go?
—I thought I ________，but in fact I came in the top 10%in the class.
A．should have failed B．couldn't have failed
C．might have failed D．mustn't have failed解析：由句中“I thought I ________，but in fact I came...”知我通过了考试，而在此之前担心“有可能考试不及格”，故选C。
答案：C(福州模拟)—Where is Michael？I cannot find him anywhere.
—He ________ have been off long.I saw him study in the room just now.
A．shouldn't B．can't
C．mustn't D．needn't解析：can't(不可能)；shouldn't(不应该)；mustn't(不可以)；needn't(不必)。由句中“我刚才还看见他在屋里学习呢。”可推知“他还没走多长时间。”can表推测，主要用于否定句和疑问句中。综上，选B。
答案：B2．情态动词＋have done的其他含义
(1)“should/ought to ＋have＋v.-ed“意为“本应该”，表示过去应该做而没有做的事，也可表示惊讶、赞叹等情绪。
这样考过
(2007·陕西)I told your friend how to get to the hotel，but perhaps I________have driven her there.
A．could B．must
C．might D．should解析：后半句的意思是：但也许我本应该开车送她去那儿。用should，构成should＋have done结构，意思是：本应该做。
答案：D(2)“shouldn't/ought not to＋have＋v.-ed”意为“本不应该”，表示过去不应该做某事但却做了。
这样考过
(天津河西区)He ________ back to work without the doctor's permission.Now，he has to stay in bed for a couple of days.
A．wouldn't have gone
B．couldn't have gone
C．needn't have gone
D．shouldn't have gone 解析：由句中后半句“he has to stay in bed for a couple of days.”知“他未遵医嘱”，含有“不该做某事而做了”之意，故选D。wouldn't have gone“本不会做而做了”；couldn't have gone“本不可能做而做了”；needn't have done“本不需做而做了”。
答案：D(厦门质检)You ________ late for yesterday's class meeting，as it was so important.
A．couldn't be
B．shouldn't be
C．mustn't have been
D．oughtn't to have been
解析：oughtn't to have done同于shouldn't have done表示“不该做某事而做了”。由句意知D合题意。
答案：D(3)“could＋have＋v.-ed”意为“本能够，本可以”，表示过去本可以做某事，但却没做。
这样考过
(江苏)He did not regret saying what he did but felt that he ________ it differently.
A．could express
B．would express
C．could have expressed
D．must have expressed解析：句意：他不后悔说了他做了什么，而认为他本能够用不同的方式表达。could express 能够表达；would express 要表达；could have expressed 本来能够表达；must have expressed(表推测)肯定已经表达。
答案：C(4)“needn't＋have＋v.-ed”意为“本没有必要”，表示过去本没有必要做某事，但却做了。
注意：“need not＋have＋v.-ed”表示过去本不必做但却做了的事；“did not need to＋动词原形”表示过去不必做某事而实际上也没有做。如：
She need not have come yesterday.她昨天本不必要来的。(但却来了)
She didn't need to come yesterday.她昨天不必来。(实际上也没来)三、固定用法
can't too...无论怎样也不过分，越……越好；can't help doing情不自禁做某事；may/might as well还是做……的好；would rather...than宁愿做……也不愿做……。
这样考过
(龙岩质检)Traffic safety is so important that everyone ________ take safety measures too seriously.
A．shouldn't B．mustn't
C．cannot D．won't
解析：can't...too...表示“怎么都不过分，千万，非常。”
答案：C(北京朝阳区)She couldn't help，even though she tried not to，________ at the strange clothes her friend was wearing.
A．to laugh B．laugh
C．laughing D．laughed
解析：couldn't help doing 禁不住做某事；even though she tried not to是状语从句，插到主句中了。
答案：C
Ⅰ.单项填空
1．—Isn't that Ann's husband over there?
—No，it________be him.I'm sure he doesn't wear glasses.
A．can't　　　　　　　　　B．must not
C．won't D．may not
答案与解析：A　can用于否定的猜测表示“不可能”。故选A。2．Kunming is called“Spring City”，but it________snow in winter.
A．shall B．can
C．must D．might
答案与解析：B　情态动词can表示客观的可能性，“有时可能”。3．You ________fail to pass the entrance examination if you don't study harder.
A．shall B．could
C．must D．should
答案与解析：A　shall用于二、三人称的陈述句中，表示说话者的意愿，有命令、警告、威胁、允诺、决心之意。此题用shall，表示警告。4．He didn't agree with me at first，but I________persuade him to sign the agreement later.
A．could B．might
C．should D．was able to
答案与解析：D　情态动词can和be able to都可表示能力。当表示“过去成功地做了某事”时，用was/were able to。5．When I was studying at Beijing University，I________take a walk along the lake every evening.
A．will B．would
C．could D．shall
答案与解析：B　情态动词would表示过去经常性或习惯性的动作。 6．— Will you stay for lunch?
—Sorry，________.My brother is coming to see me.
A．I mustn't B．I can't
C．I needn't D．I won't
答案与解析：B　根据题义可知，因为“我弟弟要来看我”，所以“不能留下”，用can't，表示对别人的邀请或要求给予礼貌的拒绝。A项表示“禁止”；C项表示“不必要”；而D项表示“不会”，均不符合题义，故本题选B。7．All the speech competitors ________ remain in their own seats until the contest is over，according to the competition rule.
A．must B．may
C．shall D．need
答案与解析：C　shall用于表示规定要求。8．— Mum，I climbed to get the Teddy Bear from the top of the shelf.
—My goodness！You________yourself.You mustn't do that next time.
A．must have hurt B．should have hurt
C．may have hurt D．can have hurt
答案与解析：C　你可能会伤了你自己。may/might have done表示对过去发生情况的可能性推测。9．—I can't get through to the general manager's office anyhow.
—The line is busy.Someone________the telephone.
A．must use B．uses
C．must have been using D．must be using
答案与解析：D　must be doing表示对现在正发生情况的肯定推测。must have been using是对过去的猜测，表示过去一直在做某事，不符合句义。10．—Tom，did you see the film Avatar last night?
—Yes，but I really________，because I had lots of work to do.
A．couldn't have B．mustn't have
C．needn't have D．oughtn't to have
答案与解析：D　题意为：“汤姆，昨天晚上你看电影《阿凡达》了吗？”“是的，但是我确实不应该看，因为我有许多工作要做。”ought to have done意为“应该做却没做”，oughtn't to have done意为“不该做却做了”。11．Her brother ________ be at home now，because he was seen playing basketball in the stadium just now.
A．mustn't B．needn't
C．can't D．shouldn't
答案与解析：C　由playing basketball可知表语气较为肯定的否定推测，故选C。can't be at home意为“不可能在家”。12．The little child________go out alone at night，so he
________walk in the dark that night.
A．daren't; didn't dare to
B．doesn't dare; dare not
C．isn't dare to; dared not to
D．doesn't dare to; dare not to答案与解析：A　题意为：这个小男孩晚上不敢单独出去，所以那天晚上他不敢走夜路。dare作为情态动词，后面直接跟动词原形，否定形式在dare后面直接加not；dare作为一般动词使用时，用dare to do结构，否定形式在dare前面加助动词和not。故选A。13．—I don't know what I________without the suitcase you lent me.
—Glad to have been of some help to you.
A．would have done B．would do
C．should have done D．should do
答案与解析：A　题意为：“我不知道没有你借给我的手提箱我将怎么办。”“很高兴对你有帮助。”would have done表示对过去事情的推测，意为“过去可能做……”；should have done表示对某事的责备和批评，意为“本该做却没做”。14．—Well，lost again!
—It's not very important.We________forget about it，OK?
A．can't B．may so soon
C．might as well D．won't soon
答案与解析：C　题意为，“哦，又输了！”“那不重要。我们不妨把这件事忘了，好吗？“might as well意为“无妨；只好”是固定用法。15．It rained a lot during their journey，so they________have had a good time.
A．can't B．must
C．shouldn't D．might
答案与解析：A　A项表示对过去事情否定的推测，can't have done意为“不可能做……”，shouldn't have done表示对某事的责备和批评，意为“本不该做却做了”。B、D都表示肯定的推测，由．..rained a lot知意义不对。16．The public transportation is very convenient in that big city，so there________be any difficulty in traveling around.
A．mustn't B．wouldn't
C．shouldn't D．needn't
答案与解析：C　题意为：那个大城市公共交通非常方便，在周围旅行不应该有任何困难。根据题意选shouldn't“不应该”。17．—That woman has been taking care of the two white tigers for 8 years.
—Oh，dear！She________a lot of difficulties!
A．could go through
B．might go through
C．ought to have gone through
D．must have gone through答案与解析：D　题意为：“那个女人已经照顾那两只白虎8年了。”“哦，天啊！她一定吃了很多苦。”must have done表示对过去事情的肯定推测，意为“一定做过……”。18．You________me up so early.I don't have to go to school today and I can sleep for more hours.
A．needn't wake
B．don't need to wake
C．needn't have woken
D．didn't need to wake
答案与解析：C　题意为：你没必要那么早叫我起床，今天我不上学，可以多睡几个小时。needn't have done表示对某事的责备和批评，意为“没必要做而做了”。19．All my family are looking forward to meeting you.You
________come over and have dinner with us this weekend.
A．Will
B．must
C．may
D．shall
答案与解析：B　题意为：我家所有人都盼望和你见面，这个周末你一定要过来和我们共进晚餐。根据题意可知选must“必须”。
20．—This________John's car.Its number is AC506.
—I don't think so.He said a small white car but this is a small yellow one.
A．can't be B．must be
C．may not be D．should be
答案与解析：B　题意为：“那一定是约翰的汽车，车牌是AC506。”“我认为不是。他说他的是一辆白色的小轿车，但这是一辆黄色的。”根据题意可知是表示对现在肯定的推测，故选B。21．Being examined twice a year，whether it is a car or a bus or a truck，is the rule that every driver________obey in this city.
A．shall B．can
C．ought to D．need
答案与解析：A　题意为：无论是小汽车、公共汽车还是卡车，在这个城市里年检两次是每位司机应该遵守的规定。当表示按要求“必须，应该”做的事并且主语是二、三人称时只能用shall。22．Last night I tried to call on you but your dog simply________not let me come through the gate.
A．might B．could
C．should D．would
答案与解析：D　题意为：昨天晚上我试图拜访你但是你的狗就是不让我进门。might表示“也许”；could表示“可能”；should表示“应该”；would表示“意愿”。根据题意选D。23．—Why don't you buy the necklace since you like it so much?
—I________，but I don't have the money.
A．would B．will
C．should D．may
答案与解析：A　题意为：“既然你非常喜欢那串项链，为什么不买呢？”“我是想买，但是我没有钱。”根据题意空处表示“想买”的意愿，所以排除C、D；因为“想买”是过去的意愿，所以选would。24．—Look！The clouds are gathering.
—Yes.I'm afraid it________be pouring down soon.
A．can B．must
C．should D．might
答案与解析：D　题意为：“看！云团在聚集。”“是的，可能马上就会大雨倾盆了。”由句子提示看出此处表推测，由I'm afraid看出把握不是非常大，故用might。can用于疑问句表示推测。25．—________he come to see you as he promised?
—Of course，please.And I'd rather he________me the truth.
A．Will; tells B．Shall; told
C．Should; will tell D．Can; is telling
答案与解析：B　题意为：“你要他像他答应的那样过来看你吗？”“当然，而且我宁愿他告诉我真相。”表示征求对方意见或请求，第三人称作主语用shall；I'd rather后面的从句要用虚拟语气，故选B。