【弯道超车】Unit 8 A green world 核心语法之含有情态动词的被动语态-2026年春译林版(2024)八年级英语下册精讲精练 (含答案解析)

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【弯道超车】Unit 8 A green world 核心语法之含有情态动词的被动语态-2026年春译林版(2024)八年级英语下册精讲精练 (含答案解析)

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/ 让学习更有效 新课备课备考 | 英语学科
2026年春译林版(2024)八年级英语下册核心语法精讲精练
Unit 8 A green world
核心语法:含有情态动词的被动语态
一、核心概念
1. 什么是“情态动词 + 被动语态”?
将情态动词(can, must, should, may等)与被动语态结合使用,表达“能够被……”、“必须被……”、“应该被……”等含义。
核心结构:
情态动词 + be + 过去分词 (p.p.)
二、结构公式
1. 基本结构:情态动词 + be + 过去分词
情态动词 结构 例句
can can be done The problem can be solved easily.
must must be done The work must be finished today.
should should be done Trees should be planted in spring.
may may be done The meeting may be put off.
need need be done The room need be cleaned.
have to have to be done The car has to be repaired.
2. 各种句式变化
句型 结构 例句
肯定句 主语 + 情态动词 + be + 过去分词 These bottles can be recycled.
否定句 主语 + 情态动词 + not + be + 过去分词 This cannot be done in five minutes.
一般疑问句 情态动词 + 主语 + be + 过去分词? Can the work be finished today
特殊疑问句 疑问词 + 情态动词 + 主语 + be + 过去分词? When should the task be completed
3. 注意:need 的两种用法
need 作情态动词:主要用于否定句和疑问句,后接动词原形
The work need not be done today.
need 作实义动词:肯定句中常用 need to be done
The room needs to be cleaned.
三、主动语态变被动语态
转换三步法
找宾语:主动句的宾语 → 被动句的主语
变谓语:主动句的谓语(情态动词 + do)→ 情态动词 + be + 过去分词
加by短语:原主语前加by(可省略)
转换示例
步骤 示例
主动句 We must protect the environment.
① 宾语变主语 The environment...
② 谓语变被动 ... must be protected ...
③ 加by短语 ... by us.
被动句 The environment must be protected by us.
常见转换对比表
主动语态 被动语态
We can repair this watch. This watch can be repaired.
You must finish the work. The work must be finished.
We have to clean the classroom. The classroom has to be cleaned.
Can they solve the problem Can the problem be solved
四、不同情态动词的语义区别
情态动词 含义 用法侧重 例句
must 必须 主观必要、义务 The rules must be followed.
have to 不得不 客观必要 The car has to be repaired.
should 应该 建议、义务 Litter should be put in the bin.
can 能够 能力、可能性 Glass can be recycled.
may 可以 许可、可能性 The meeting may be put off.
need 需要 必要性 The work need not be done.
五、特殊句型处理
1. 短语动词的被动语态
短语动词在被动语态中应视为一个整体,介词或副词不能省略。
主动句 被动句
They should take care of the old. The old should be taken care of.
We must hand in our homework. Our homework must be handed in.
You can't laugh at the poor. The poor can't be laughed at.
2. 双宾语动词的被动语态
当主动句有两个宾语时,有两种被动形式:
主动句 被动句1(人作主语) 被动句2(物作主语)
We should give him a chance. He should be given a chance. A chance should be given to him.
They will send us new books. We will be sent new books. New books will be sent to us.
3. 使役动词和感官动词的被动语态
主动语态中省略的to,在被动语态中要还原:
主动句 被动句
The teacher made him retell the story. He was made to retell the story.
We saw them play basketball. They were seen to play basketball.
4. 疑问句的被动语态
类型 结构 例句
一般疑问句 情态动词 + 主语 + be + 过去分词? Can the problem be solved
特殊疑问句 疑问词 + 情态动词 + 主语 + be + 过去分词? When should the work be finished
六、常见错误提醒
常见错误及纠正:
遗漏be动词(最高频错误!)
The work must finished today.
The work must be finished today.
情态动词后动词形式错误
This can be do easily.
This can be done easily.
need在肯定句中误用为情态动词
The room need be cleaned.(肯定句)
The room needs to be cleaned.
短语动词介词遗漏
The children must be taken good care.
The children must be taken good care of.
使役动词被动忘记加to
He was made do the work.
He was made to do the work.
must与have to的否定混淆
You mustn't do it today = 不必(错,mustn't表禁止)
You don't have to do it today.(不必)
七、记忆口诀
情态动词被动语态口诀
情态被动很容易,情态加be加过分;
can/must/should 都一样,be动词后跟过分。
否定句加not紧跟,疑问句情态提前行;
短语动词是整体,介词副词不能分。
need 用法要注意,肯定句中加to才能行;
使役感官被动态,省略to的要还原。
绿色环保常使用,should/must be done记心间;
垃圾分类can be recycled,节约能源should be saved。
1.A lovely Mickey Mouse can _____ when you walk into the park.
A.see B.saw C.seen D.be seen
2.—Shenzhen Ping'an Financial Center is the tallest building in the city.
— from here
A.Can it see B.Can it be seen
C.Does it see D.Can be seen
3.I think that bicycles for this trip. It will be fun and good for our health.
A.should use B.will use
C.should be used D.will be able to use
4.If a child is under 6years old, he ____________to visit the zoo for free.
A.can allow B.can't allow
C.can be allowed D.can't be allowed
5.— Should the bad ones______
— Yes, _______. They should be thrown away.
A.be picked out; they should B.pick out; they shouldn't
C.be picked out; they cannot D.pick out; they can
6.—How often do you feed your pet dog
—It _______ food every four hours.
A.must be given B.must give C.must be gave
7.—The clothes on the bed ____________very dirty, Mum. They smell terrible.
—Yes, they ____________.
A.can be; should be washed B.must be; should wash
C.can be; should wash D.must be; should be washed
8.Your bag ______ into the classroom. You should put it outside.
A.should bring B.should be brought
C.shouldn't bring D.shouldn't be brought
9.—When should I hand in my paper
—Your paper must as soon as the bell .
A.hand in, rings B.hand in; will ring
C.be handed in; will ring D.be handed in ; rings
10.The meeting _______ put off because of the heavy rain.
A.must B.must to C.must be D.must being
11.As everyone knows, rubbish _________ everywhere.
A.need be thrown B.mustn't be thrown
C.can't thrown D.may throw
12.— What should we do first if we want to develop our village
— First of all, a new road ______, I think.
A.must build B.has to build C.must be built D.has built
13.I promise that my parents will _______ if they grow old.
A.be taken care B.be taken care of
C.take care D.take care of
14.—When should I hand in my paper
—Your paper must as soon as the bell .
A.hand in; rings B.hand in; will ring C.be handed in; rings
15. The baby must____well.
A.be looked after B.look after C.look for
16.—How long may I________your dictionary
—For one week.But it mustn't________to others.
A.keep;be lent B.borrow;lend
C.lend;be borrowed D.have;borrow
17.Mr. Lee has a loud voice. His voice can _______ clearly even in that big classroom.
A.hear B.be hearing C.have heard D.be heard
18.People who drink wine to drive after May Day.
A.don't allow B.isn't allowed
C.mustn't allowed D.mustn't be allowed
19.Teenagers should to take care of themselves from a young age.
A.educate B.be educating C.be educated
20.Waste paper shouldn't _______everywhere. It's our duty to keep our city clean.
A.be thrown B.throw C.is thrown D.are thrown
21.— Must colours ______ to the cartoon, Mr. White
— Yes, they ______.
A.add; must B.add; mustn't
C.be added; must D.be added; mustn't
22.Twelve-year-olds should not to drive in China.
A.allow B.be allow C.be allowed D. allowed
23. If both drivers and pedestrians (行人) are careful enough, many accidents can .
A.protect B.be protected C.prevent D.be prevented
24. The sick girl ____ to the hospital at once.
A.must send B.be must sent
C.must be sent D.be sent
25.These books _______ to the library on time.
A.should are returned B.should be returned
C.should returned D.should return
26.How dirty the tables are! They need ______.
A.to clean B.clean C.cleaning D.cleaned
27. The rivers smells terrible People must ____ dirty things into it.
A.be stopped to throw B.be stopped from throwing
C.stop to throw D.stop from throwing
28.Children _____ to watch this kind of movie because it's too scary.
A.should allow B.shouldn't be allowed
C.should be allowed D.don't allow
29.Tom insisted that his sister ________ to school.
A.is sent B.will be sent C.would be sent D.should be sent
30.I think much attention________ to your table manner.
A.should pay B.should be paid C.ought be paid D.must pay to
31.—The sick monkey to the animal centre tomorrow morning.
— I hope it will be better soon.
A.is sent B.will send
C.may be sent D.is going to send
32.Don't put off today's work for tomorrow. I mean, today's work _____ today.
A.may do B.must do C.may be done D.must be done
33.Dry clothes shouldn't up near a fire.
A.hang B.be hung C.be hanging
34.His room needs so be must have it .
A.painting;painted B.painted;painting
C.painting;painting D.painted;fainted
35.Children under 14 must be _____ by an adult.
A.company B.accompany C.companied D.accompanied
36.The old men and children must _______ in our country.
A.take good care B.be taken good care
C.take good care of D.be taken good care of
37.The flowers often.
A.must be water B.must be watered C.must watered
38.Attention, please! All the mobile phones ____ during the meeting.
A.must be kept off B.are keeping off
C.kept off D.have kept off
39.A good student ____________what to do next and he should be independent.
A.should always be told B.should always tell
C.shouldn't always be told D.shouldn't always tell
40.Good books _______ again and again.
A.should be read B.should read C.must read D.can read
41.The word couldn't ________this way.
A.be used B.use C.used D.be using
42.Dry clothes shouldn't _______up near a fire.
A.hang B.be hung C.be hanging D.be hanged
43.Old people must _______.
A.look after well B.be looked well
C.looked well after D.be looked after well
44.—The river water keeps rising and the rice fields are in danger.
—Action now!
A.should take B.has taken C.must be taken D.need taking
45.—Final exam is coming. Tom, don't watch TV for too long.
—I'm not a child any more. I what to do.
A.should always tell B.should always be told
C.shouldn't always tell D.shouldn't always be told
46.— What's the meaning of the activity "Let's Save"
— Paper shouldn't in everyday life.
A.waste B.wasted C.be wasted
47.Our room must ________clean.
A.keep B.be kept C.to be kept D.to keep
48.This village can ________ into a place of interest.
A.be turned B.turns C.is turning D.turned
49.Thanks to the Internet, different kinds of information _______ in a short time.
A.can be learned B.has been learned
C.can learn D.has learned
50. It is essential that all buildings ____ to withstand earthquakes.
A.design B.designed C.be designed D.are designed
参考答案及试题解析
1.D
【解析】句意:当你走进公园时,可以看到一只可爱的米老鼠。see动词原形; saw 过去式;seen 过去分词;be seen 被动语态;can后跟动词原形,排除B和C;由句意可知这里是被动语态,故答案为D。
【点评】考查被动语态。注意识记被动语态的用法。
2.B
【解析】句意:——深圳平安金融中心是全市最高的建筑。——从这里可以看到吗?A.它能看,带情态动词的主动语态;B.它能被看,带情态动词的被动语态;C.它看到了,一般现在时的主动语态;D.被看到,带情态动词的被动语态。根据空格,可知本句缺少主语it指代上句提到的Shenzhen Ping'an Financial Center;再根据 Shenzhen Ping'an Financial Center is the tallest building in the city. 深圳平安金融中心是全市最高的建筑,可知应是询问:从这里可以看到吗?应用情态动词can引导疑问句;再根据主语it和动词see的被动关系,可知应用被动语态can it be seen。故选B。
【点评】考查带情态动词的被动语态。注意掌握带情态动词的被动语态的结构:情态动词+be+过去分词。
3.C
【解析】句意:我认为自行车应该被使用在本次旅行。对于我们的健康它将是有趣的和有好处的。use使用,实义动词,主语bicycles是动作use的承受者,should和will是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,排除A、B、D,use的过去分词是used,故选C。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词。
4.C
【解析】句意:如果一个孩子小于6岁,他能被允许免费参观动物园的。根据常识可知小孩子是免费参观动物园的,句子的主语和谓语之间是被动关系,可知这是含有情态动词的被动语态,情态动词+be+done,故选C。
【点评】考查含有情态动词的被动语态。注意识记其结构。
5.A
【解析】句意:——坏的应该被挑出来吗? ——是的,它们应该。 它们应该被扔掉。 pick out挑选,动词短语,此处是情态动词的被动语态:情态动词+be+done结构;should提问的一般疑问句,还是用should回答,故选A。
【点评】考查情态动词的被动语态及一般疑问句,注意情态动词的被动语态的构成及用法。
6.A
【解析】句意:——你通常多久喂一次你的宠物狗?——它肯定是每四个小时被喂一次。must be,表肯定的推测,食物是被给,因此用must be given,故选A。
【点评】考查情态动词,注意情态动词被动语态的用法。
7.D
【解析】句意:——床上的衣服很脏,妈妈。它们闻起来很难闻。——是的,它们应该洗了。 They smell terrible. 可知这些衣服一定是脏的,对事情表示肯定推测用情态动词must;它们应该洗了,句子的主语和谓语之间是被动关系,故选D。
【点评】考查情态动词和含情态动词的被动语态。注意根据句意和语境确定语态。
8.D
【解析】句意:你的书包不应该带进教室。你应该把它放在外面。根据句子You should put it outside. 可知书包不应该被带进教室,是否定的,排除A和B;根据句意可知是被动语态:be+过去分词,故答案为D。
【点评】考查被动语态。注意识记被动语态否定式的结构和用法。
9.D
【解析】句意:——我应该什么时候上交我的试卷?——铃声一响,你的试卷必须被交上。hand in上交,实义动词短语,主语paper是动作hand in的承受者,must是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,hand的过去分词是handed,排除A、B。ring铃声响,实义动词,as soon as引导的时间状语从句,从句用一般现在时,主语是单数bell,所以ring用单三式rings,故选D。
【点评】考查含有情态动词的被动语态和时间状语从句,注意平时识记含有情态动词的被动语态结构情态动词+be+动词过去分词。
10.C
【解析】句意: 由于下大雨,会议将被推迟。the meeting是put off的动作承受者,此处是含情态动词的被动语态,用must be done,故选C。
【点评】考查含情态动词的被动语态。注意根据语境选择正确的语态。
11.B
【解析】句意:众所周知,禁止到处扔垃圾。need需要;mustn't禁止;can't不能;may或许,rubbish与动词throw之间是动宾关系,句子使用情态动词的被动语态,故选B。
【点评】考查情态动词的被动语态,注意情态动词的被动语态的构成及用法。
12.C
【解析】句意:——如果我们想要发展我们的村庄,我们首先应该做什么?——首先,我认为必须修建一条新路。A.must build必须建;B.has to build 不得不建;C.must be built必须建(被动语态) ;D.has built(已经)建;根据句意可知主语a new road和谓语动词build的承受者,应该用被动语态。故答案为C。
【点评】考查含有情态动词的被动语态。主语识记被动语态的构成和用法。
13.B
【解析】句意:我保证,如果我的父母变老了,他们会得到照顾。A.被保重,被动语态;B.被照顾,被动语态;C.保重,主动语态;D.照顾,主动语态。if they grow old如果我的父母变老了,结合选项可知讲的是他们会得到照顾,排除A、C;主语parents是动作take care of的承受者,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,故选B。
【点评】考查被动语态,首先理解选项区别,然后根据句意确定短语,最后根据主语和谓语关系确定语态,理解含有情态动词的被动语态结构。
14.C
【解析】句意:——我应该什么时候交论文?——铃声一响,你的论文必须上交。paper与hand in是被动关系,as soon as遵循“主将从现”,也就是从句部分不能用一般将来时,故选C。
【点评】考查含有情态动词的被动语态。
15.A
【解析】句意:这个婴儿必须被照顾好。be looked after被照顾;look after照顾;look for寻找。根据题意可知,婴儿必须被照顾好,因此为含有情态动词的被动语态,谓语动词用be done的形式,故选A。
【点评】考查含有情态动词的被动语态和短语辨析,注意被动语态的用法和区分短语的含义。
16.A
【解析】句意:——我可以借你的字典多长时间?——一周。但是它禁止被借给他人。keep保存,借,是borrow和lend的延续性动词;borrow借来,非延续性动词;lend借给,非延续性动词;have拥有,延续性动词。how long引导的句子要用延续性动词,排除B、C。lend sth. to sb.把某物借给某人,固定搭配,it代指dictionary,是动作lend的承受者,must是情态动词,所以用含有情态动词的被动语态,结构是情态动词(not)+be+动词过去分词,lend的过去分词是lent,故选A。
【点评】考查动词辨析及被动语态,注意平时识记延续性动词和非延续性动词。
17.D
【解析】句意:李先生声音很大。即使在那间大教室里,他的声音也听得很清楚。由voice与hear之间是被动关系,被听见,要用被动关系,空格前有情态动词can,要用情态动词的被动语态:can+be+过去分词,hear的过去分词heard,故选D。
【点评】考查情态动词can的被动语态的构成。根据主语与动词的关系确定语态。
18.D
【解析】句意:五一之后喝酒的人不允许开车。allow允许,实义动词,主语people是动作allow的承受者,mustn't是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,allow的过去分词是allowed,故选D。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词。
19.C
【解析】句意:青少年应该从小被教育照顾他们自己。根据Teenagers和to take care of themselves可知,青少年应该被教育照顾自己,所以此句用被动语态,空格前有should,所以后面用be动词原形be,所以是be done,故选C。
【点评】考查情态动词should后接被动语态的用法。注意should be done的用法。
20.A
【解析】句意:废纸不应该被扔得到处是。保持我们城市干净是我们的职责。throw扔,实义动词,主语paper是动作throw的承受者,shouldn't是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,throw的过去分词是thrown,故选A。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词。
21.C
【解析】句意:——怀特先生,这幅漫画必须加颜色吗 ——是的,他们必须。根据答语yes可知这里是肯定回答,must的肯定回答是,yes,主语+must,排除B和D;句子主语colour是动词add的承受者,用被动语态be+过去分词,故答案为C。
【点评】考查被动语态。注意识记被动语态的构成和用法。
22.C
【解析】句意:在中国,十二岁的孩子不应该被允许开车。 主语Twelve-year-olds和谓语动词allow是动宾关系,应该用被动语态,前面有情态动词should,结构为:should be done。故选C。
【点评】考查被动语态,注意情态动词的被动语态的用法。
23.D
【解析】句意:如果司机和行人都足够小心,许多事故都可以避免。A保护,B被保护,C防止,D被防止,根据drivers and pedestrians(行人) are careful enough,可知结果是事故都可以避免,动词和accidents是被动关系,can是情态动词,被动形式是can be done,故选D。
【点评】考查动词,注意识记情态动词被动语态的用法。
24.C
【解析】句意:生病的女孩必须马上被送到医院。send,送,动词,与主语the girl存在被动关系,需要使用被动语态,must,必须,情态动词,含情态动词的被动语态结构是:主语+情态动词+be+过去分词+其他,send的过去分词是sent,所以A B D选项错误,故选C。
【点评】考查含情态动词的被动语态。注意含情态动词的被动语态的句型结构。
25.B
【解析】句意:这些书应该准时归还到图书馆。books与return之间是被动关系,要用被动语态。句子谓语动词要用情态动词should的被动语态,should +be +过去分词,return的过去分词returned,故选B。
【点评】考查情态动词should的被动语态的构成。根据主语与动词的关系确定语态。
26.C
【解析】句意:桌子太脏了!它们需要被清理。 某物需要被……可以表达为need to be done或者need doing; 根据 How dirty the tables are! (桌子太脏了!)可知桌子是主语,需要被清理,故选C。
【点评】考查固定搭配。理解句意,注意识记need to be done或者need doing的意思。
27.B
【解析】句意: 这条河里的气味很难闻,一定要阻止人们把脏东西扔进河里。stop sb from doing sth阻止某人做某事,固定搭配,此处people是stop的动作承受者,前面有情态动词must,此处应该是含情态动词的被动语态,用must be done,故选B。
【点评】考查固定搭配和含情态动词的被动语态。注意固定搭配stop sb from doing sth。
28.B
【解析】句意:孩子们不被允许看这种电影,因为它是太吓人了。allow允许,实义动词,主语children是动作allow的承受者,所以用被动语态,排除A、D。should是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,allow的过去分词是allowed,根据because it's too scary可知电影太吓人,所以不被允许观看,所以用否定,故选B。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词,然后根据关键词句确定。
29.D
【解析】句意: 汤姆坚持要他妹妹上学。send送,动词,send sb. to sp.送某人去某地,固定搭配,所以此处his sister是send的动作承受者,用被动语态,insist后跟宾语从句,从句应该用虚拟语气,用should do形式,此处应该是含情态动词的被动语态,用should be done,故选D。
【点评】考查含情态动词的被动语态。注意insist后跟的宾语从句用虚拟语气。
30.B
【解析】句意: 我认为要注意你的餐桌礼仪。attention是pay的动作承受者,此处需被动语态,p排除A和D;should应该,ought to应该,C项结构错误,此处是含情态动词的被动语态,故选B。
【点评】考查含情态动词的被动语态。注意含情态动词的被动语态结构。
31.C
【解析】句意:这只生病的猴子明天上午要被送到动物中心。——我希望它很快好起来。结合语境可知本句表示的是将来的动作,故用一般将来时态或者虚拟语气,句子主语是动作对象,故用被动语态。选项BD不是被动语态,故选C,可能被送到。
【点评】英语中的时态主要是借助于时间状语与上下文语境来进行判断。解答此类题型,首先要注意句子中的时间状语,如果没有则要通过分析上下文,结合语境来判断句子的时态。语态的判断主要是确定句子主语与谓语动词的关系。如果是主动关系则用主动语态,反之如果是动宾关系,则用被动语态,尤其要注意一些特殊动词的用法。
32.D
【解析】句意:不要把今天的工作留到明天。我的意思是,今天的工作必须今天完成。may可以,可能;must必须,一定。结合语境可知下文主语为动作对象,故用被动语态。 选D。
【点评】考查情态动词的被动语态。
33.B
【解析】句意:干衣服不应该被悬挂在火的旁边。hang up,悬挂,过去分词是hung up。结合选项可知,衣服被悬挂,所以要用被动语态,且用在情态动词shouldn't后面动词要用原形,所以用be done,故选B。
【点评】考查情态动词和被动语态用法。注意情态动词后用动词原形。
34.A
【解析】他的房间需要被粉刷,所以一定要粉刷它。need +动词ing,意为需要被……;have sth. +动词ed,也为使某物被……。房间是被粉刷,所以都是被动。故选A。
【点评】本题考查了两种不同的被动表达形式,need+动词ing与have sth. +动词ed,一定要掌握好,不要弄混淆。
35.D
【解析】句意:14岁以下的儿童必须由成年人陪伴。company陪伴,不可数名词; accompan陪伴,动词。选项C,companied,没有这种形式。主语Children under 14 与accompany之间是被动关系,用被动语态,空格前有must be,可知用情态动词的被动语态must be+过去分词,accompany的过去分词accompanied,故选D。
【点评】考查情态动词的被动语态的构成和用法。根据句子结构和主语与谓语动词之间的关系,缺少语态。
36.D
【解析】句意:在我国老年人和儿童必须得到很好的照顾。take good care of好好照顾......,固定短语,相当于及物动词;take good care小心,动词短语,相当于不及物动词。由 the old men and children与take good care of之间是被动关系,被照顾。空格前有情态动词must,要用情态动词的被动语态,must+be+过去分词,take的过去分词taken,故选D。
【点评】考查情态动词的被动语态。根据主语与动词之间的关系确定语态。同时要注意只有及物动词或短语才能用被动语态。
37.B
【解析】句意:这些花必须经常被浇水。含有情态动词被动语态的结构是情态动词+be done,故选B。
【点评】考查含有情态动词被动语态。
38.A
【解析】句意:请注意!开会时,所有的手机都要关掉。A.must be kept off必须关掉(被动语态); B.are keeping off正关掉(现在进行时);C.kept off 关掉(过去时);D.have kept off 已经关掉(现在完成时)由句意可知主语all the mobile phones和动词keep off之间是被动关系,用被动语态,故答案为A。
【点评】考查被动语态。注意识记被动语态的构成和用法。
39.C
【解析】句意:一个好学生不应该经常被告诉下步要做什么,他应该学会独立。根据 he should be independent 可知不应该经常被告诉怎么做,主语和谓语之间是被动关系,故选C。
【点评】考查含有情态动词的被动结构。注意理解句意,掌握其结构。
40.A
【解析】句意:好书应该再读一遍。由books与read是被动关系,书被读,要用被动语态。情态动词的被动语态:情态动词+be+过去分词,read的过去分词read,故选A。
【点评】考查情态动词的被动语态。根据主语与动词的关系,确定语态。
41.A
【解析】句意:这个单词不能用这种方式被使用。use使用,实义动词,word单词,主语word是动作use的承受者,couldn't是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,use的过去分词是used,故选A。
【点评】考查含有情态动词的被动语态结构,注意平时识记其结构是情态动词+be+动词过去分词。
42.B
【解析】句意:干衣服不应该被悬挂在火旁。hang悬挂,实义动词,主语clothes是动作hang的承受者,shouldn't是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,hang的过去分词是hung,故选B。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词。
43.D
【解析】句意:老人们必须被好好照顾。look after well好好照顾,主语people是动作look after well的承受者,must是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,look的过去分词是looked,故选D。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词。
44.C
【解析】句意:——河水不断上涨,稻田岌岌可危。——现在必须采取行动!A.应该采取,带情态动词的主动语态;B.已经采取,现在完成时的主动语态;C.必须被采取,带情态动词的被动语态;D.必须采取,主语和动作是被动关系。根据 The river water keeps rising and the rice fields are in danger. 河水不断上涨,稻田岌岌可危,可知应是强调:现在必须采取行动!再根据主语action和动作take的被动关系,可知应用带情态动词must的被动语态must be taken。故选C。
【点评】考查带情态动词must的被动语态。注意带情态动词被动语态的结构:情态动词+be+过去分词。
45.D
【解析】句意:——期末考试就要到了。汤姆,不要看电视太久。——我不再是个孩子了。我不应该总是被人指手画脚。A:应该随时告诉;B:应该经常被告知;C:不应该总是这么说;D:不应该总是告诉;根据 I'm not a child any more. 可知这里应该是不应该被告知做什么,故答案为D。
【点评】考查含有情态动词的被动语态。识记被动语态的构成和用法。
46.C
【解析】句意:——“让我们节约”活动的含义是什么?——在日常生活中,我们不应该浪费纸张。save的含义就是not waste,因paper与save之间存在被动意义,要用被动语态,故选C。
【点评】考查被动语态。注意熟记含有情态动词的被动语态的基本结构
47.B
【解析】句意:我们的房间必须被保持干净。keep保持,系动词。room是动作keep的承受者,must是情态动词,所以用含有情态动词的被动语态,结构是情态动词+be+动词过去分词,keep的过去分词是kept,故选B。
【点评】考查含有情态动词的被动语态,注意平时识记其结构情态动词+be+动词过去分词。
48.A
【解析】句意:这个村子可以变成一个名胜古迹。村子被变成名胜古迹,用被动语态。句子含有情态动词can,则为can be done。故选A。
【点评】考查情态动词can的被动语态。
49.A
【解析】结合语境可知句意为“多亏了互联网,不同种类的信息能够在很短的时间内被知道”。此处应用被动语态,can be learned意为“能够被知道”。故选A。
50.C
【解析】句意: 至关重要的是,所有建筑物都应该被设计成可以抵抗地震。design设计,动词, It is essential that 后跟should加动词原形,should可以省略,此处主语all buildings是design的动作承受者,所以此处用含情态动词的被动语态,should可以省略,故选C。
【点评】考查固定搭配和含情态动词的被动语态。注意 It is essential that 后面从句需要用should加动词原形的用法。
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