2024年英语中考语法专题清单十一动词的语态详解真题训练

知识导图2024年江苏中考英语语法专题清单专题十二、动词的语态知识导图语态是动词的一种形式，表示主语和谓语动词之间的具体关系，分为主动语态和被动语态两种。主动语态表示主语是谓语动词所表示的动作的执行者，被动语态表示谓语动词表示的动作的承受者。被动语态的基本结构是“be+动词的过去分词”。几种常见时态及情态动词的主被动语态结构如下：时态主动语态被动语态一般现在时do/does/am/is/aream/is/are/was/were+done一般过去时did/was/werewas/were+done现在进行时am/isare+doingam/isare+beingdone现在完成时have/has+donehave/has+beendone一般将来时will/shall+dowill/shall+be+done过去进行时was/were+doingwas/were+being+done过去完成时had+donehad+been+done过去将来时would/should+dowould/should+be+done包含情态动词can/may/must+docan/may/must+bedone1、各种时态的被动语态（1)一般现在时的被动语态一般现在时的被动语态的构成是“am/is/are+过去分词”。He

is

loved

by

all

his

pupils.他受到他所有学生的爱戴。Is

King

Lear

written

by

Shakespeare?《李尔王》是莎士比亚写的吗？－What

a

beautiful

factory!

I

want

to

work

in

it.

－Well,workersvery

much

here.

needing

needed

need解析

句意：－多漂亮的工厂啊！我想在里面工作。－哦，这里非常需要工人。工人们是“被需要”，所以选C.

（2)一般过去时的被动语态一般过去时的被动语态的构成为“was/were+过去分词”。

The

letter

was

written

in

Spanish.这封信是用西班牙语写的。

Paperabout

2,

000

years

ago

in

China.

creating

created

created

created解析

句意：纸是大约2,

000年前在中国被发明的。本题考查动词的时态和语态。根据时间状语about

2,

000

yearsago可知，此处应用一般过去时；paper与create(发明）之间是被动关系，应用被动语态。故选D项。（3）一般将来时的被动语态一般将来时的被动语态的构成为“will/shall+be+过去分词”。shall

主要用于第一人称I,we;will可用于各种人称。

I

shall

be

given

a

chance

to

play

in

this

game

again.我将获得再一次参加比赛的机会。When

will

the

work

be

finished?工作什么时候完成？例－Can

I

move

into

the

new

room?－No,you

can't.

Itsoon.

paintedB.willpaint

be

paintedD.waspainted解析句意：－我能搬到新房间吗？－不，你不能。它马上就要被粉刷了。本题考查动词的时态和语态。It指the

new

room,与paint(粉刷）之间是被动关系，要用被动语态，排除B.根据soon(不久以后）可知要用一般将来时，故选C.(4)现在进行时的被动语态现在进行时的被动语态的构成为“am/is/are+being+过去分词”。

The

school

library

is

now

being

built.学校图书馆正在建设中。

例题A

new

cinemahere

now.

They

hope

to

finish

it

next

month.

be

built

building

built

being

built解析

句意：现在这里一个新的电影院正在被建，他们希望下个月完工。由now可知表示现在正在进行的动作，应用现在进行时；“cinema”和“build”之间是被动关系，要用被动语态，故选D.（5）过去进行时的被动语态过去进行时的被动语态的构成为“was/were+being+过去分词”。The

car

was

being

fixed

when

you

meant

to

drive

it

away.当你打算把车开走时，车正在修理。Trees

here

this

time

last

year.were

being

planted

planted

planting

解析

句意：去年的这个时候这里正在植树。this

timelast

year是过去的时间点，应用过去进行时；又因为“Trees”与“plant”

A（6）现在完成时的被动语态现在完成时的被动语态的构成为“have/has+been+过去分词”。

The

homework

has

been

finished.

作业已经做完了。例－How

many

Chinese

astronauts(航天员）intospace

since

2003?

－Eleven,including

two

women.

sent

been

sent

sent解析

句意：－从2003年到现在有多少名中国航天员被送人太空？－11名，其中包括两名女性。本题考查动词的时态和语态。由句意可知astronauts

和send之间是被动关系，故用被动语态；由since

2003可知应用现在完成时。现在完成时的被动语态结构为；have/has+been+动词过去分词，所以答案为：C(7)过去完成时的被动语态过去完成时的被动语态的构成为“had+been+过去分词”。The

room

had

been

broken

into

before

we

came.我们来之前有人闯进过这间屋子。(8)过去将来时的被动语态过去将来时的被动语态的构成为“would/should+be+过去分词”。

My

sister

would

be

taken

care

of

by

Grandma.我妹妹将得到奶奶的照料。情态动词的被动语态(1)肯定句：主语＋情态动词＋be+过去分词Such

work

can

be

done

in

an

hour

or

so.这样的工作可以在一个小时左右做完。The

puter

must

be

repaired

now.这台电脑必须立刻修理。(2)否定句：主语＋情态动词＋not+be+过去分词Anything

here

can't

be

touched.这里的任何东西都不能碰。(3)一般疑问句：情态动词＋主语＋be+过去分词Shall

dogs

and

cats

be

taken

into

this

park?狗和猫允许被带到这个公园里吗？例Thanks

tothe

Internet,different

kinds

of

informationin

a

short

time.

be

learned

been

learned

learn

learned解析

句意：多亏了因特网，人们可以在短时间内了解到不同种类的信息。本题考查语态。由于本句中主语与谓语构成被动关系，故要用被动语态，可排除C、D,再结合句意可知选A.

1、不知道或不必提及动作的执行者不知道或没必要提到动作的执行者是谁时，常用被动语态。

Three

people

were

injured.

三人受伤了。The

building

was

burned

down.

大楼被烧毁了。2、强调动作的承受者当强调动作的承受者，将承受者作为谈话的中心时，常用被动语态。这类句子常有一个by引导的短语说明动作的执行者，有时也可没有。

This

poem

was

written

by

Whitman.这首诗是由惠特曼写的。These

children

were

well

tended

by

neighbors.这些孩子是由邻居精心照料的。3、动作的执行者很模糊当动作的执行者很模糊时（如people,one等），常用被动语态。

The

song

is

said

to

be

very

popular

abroad.据说这首歌在国外很流行。The

letter

has

been

opened.

这封信有人拆开过。4.出于礼貌，避免说出动作的执行者有时出于礼貌，不便提到动作的执行者，此时用被动语态。动作的执行者有可能是别人也有可能是自己。The

window

was

broken

this

morning.今天早上窗玻璃让人打碎了。My

diary

has

been

browsed.

我的日记让人看了5.当动作的执行者不是人时，多用被动语态The

window

was

blown

open

by

wind.窗户被风吹开了。The

whole

village

has

been

washed

away

by

the

flood.整个村庄都被洪水冲走了。科技文献中为了客观地描述事物及其变化过程应使用被动语态

The

film

is

coated

with

lightsensitive

chemicals,whichare

changed

by

the

different

shades

and

colors

of

light.

胶卷上涂有一层能感光的化学物质，这些物质随着光的不同色度与颜色的变化而改变。

The

WestEast

Gas

Pipeline

Project

was

kicked

off

on

July4,

2002,a

big

event

in

the

nation's

West

Development

Strategy.西气东输工程于2002年7月4日全线开工，这是国家西部大开发战略的一件大事。

He

was

born

in

this

city.

他出生在这个城市。1、主动语态变被动语态（1)要将主动句里的宾语变为被动句中的主语，若主动句中的宾语是人称代词，要将宾格变为主格。（2)把主动句中的主语变为被动句中的宾语，主格变为宾格，并由by引出。（3)谓语动词变成相应的被动形式。主动语态：动作执行者＋谓语动词主动形式＋动作承受者。被动语态：动作承受者＋谓语动词被动形式＋by+动作执行者。主动语态Samplantedthetreelastyear主语谓语宾语状语被动语态ThetreewasplantedbySamlastyear主语be+过去分词by+原主语状语2.带双宾语的谓语动词变为被动语态带双宾语的谓语动词变为被动语态时，既可以将间接宾语转化成主语，也可以将直接宾语转化成主语。若将间接宾语转化成主语，则保留直接宾语；若将直接宾语转化成主语，则保留间接宾语，且在被保留的间接宾语前加上介词to或for.

She

gave

me

a

book.

(变为被动语态）→I

was

given

a

book

by

her.

(间接宾语me变为主语）→A

book

was

given

to

me

by

her.

(直接宾语a

book变为主语）※温馨提示间接宾语前带to的动词有：bring,give,send,show,pass,take,lend,post,teach,write,throw,hand等。间接宾语前带for的动词有：buy,cook,find,get,make,save等。

许多由不及物动词构成的短语动词相当于及物动词，可以有宾语，也可以有被动语态。

The

children

have

been

taken

good

care

of.这些孩子得到了很好的照料。

※温馨提示短语动词是一个不可分割的整体，在变为被动语态时，不能丢掉构成短语动词的介词或副词。

We

should

speak

to

the

old

politely.

(变为被动语态）→The

old

should

be

spoken

to

politely.

In

many

places

in

China,

the

old

over

90notonly

by

their

familybut

also

by

the

government.

taking

good

care

taken

good

care

of

taking

good

care

of

taken

good

care解析

the

old为复数概念与take

good

care

of

为被动关系，take

good

care

of

为短语动词，在变为被动语态时不能丢掉介词，故选B项。4、带复合宾语的动词变为被动语态宾语加上宾语补足语一起构成复合宾语。变被动语态时，只把宾语变为被动句的主语，宾语补足语保留在原处，成为主语补足语。

I

heard

Jane

playing

the

piano

in

her

room.

(变为被动语态）→Jane

was

heard

playing

the

piano

in

her

told

us

to

follow

her

instructions.

(变为被动语态）→We

were

told

to

follow

her

instructions.

※温馨提示在see,watch,hear,notice,make等动词后作宾语补足语的动词不定式都不带to,但变成被动语态后都要带上to,这时不定式为主语补足语。也就是说，不定式作主语补足语时不存在省略to的问题。

We

often

hear

him

play

the

guitar.

(变为被动语态）→He

is

often

heard

to

play

the

guitar.

If

you

see

the

cartoon

film,you

willlaugh.be

made

made

to

to

解析

make

sth.

made

to

do

sth.

,故选B项。5、含有情态动词的句子变为被动语态若主动语态中谓语含有情态动词，在相应的被动语态中通常应保留该情态动词，其结构为“情态动词＋be(或be的适当时态形式）＋过去分词”。

Everyone

must

know

this.→This

must

be

known

by

everyone.The

boss

may

have

sent

her

to

work

elsewhere.→She

may

have

been

sent

to

work

elsewhere

by

the

boss.

（1)

open,lock,write,read,sell,clean,wash,cut,burn,drive,peel等词作不及物动词时，它们的主语为物，可用主动形式表被动意义。被动语态的注意事项

This

kind

of

shirt

sells

well

here.这种样式的衬衫在这里很好卖。This

shirt

washes

well.

这件衬衫很耐洗。The

car

drives

well.

这辆车很好开。This

orange

peels

easily.

这个橘子很容易剥皮。（2)look,sound,taste,smell,feel

等系动词用主动形式表被动意义。Uniforms

look

ugly

on

us.

制服穿在我们身上很难看。Mooncakes

taste

delicious.

月饼尝起来很可口。The

song

sounds

wonderful.

这首歌听上去棒极了。例－The

food

looked

bad,but

it_OK.－So

we

can't

judge

a

man

by

his

appearance.is

tasted

tasted解析

由句中的looked可知用一般过去时，又因本题中taste为系动词，应用其主动形式表被动意义，故选B项。

（3)在be

worth

doing

中，doing表被动意义。This

book

is

worth

reading.

这本书值得一读。The

football

match

is

well

worth

watching.这场足球赛很值得观看。（4)want,need,require等动词表示“需要”，后面常可跟v.

ing形式表被动，相当于to

be

done.

My

bike

needs

repairing.＝My

bike

needs

to

be

repaired.我的自行车需要修理了。Your

hair

wants

cutting.

你的头发该理了。2、被动形式表主动意义常见的用被动形式表主动意义的词或词组有以下这些：be

seated坐着，就座，相当于seat

is

seated

on

a

bench.

(=He

seats

himself

on

a

bench.)他坐在长凳上。Please

be

seated,ladies

and

gentlemen!女士们，先生们，请就座！be

lost迷路He

was

lost

in

the

forest.

他在森林里迷路了。（3)be

dressed穿着The

girl

was

dressed

in

a

red

skirt.这个女孩穿着一件红色的短裙。（1)被动语态表示以主语为动作的承受者，而系表结构则表示主语的特点或所处的状态。二者形式相同，意义却不一样。The

shop

is

closed

at

9:

00

pm.这个商店晚上九点钟关门。（动作）The

shop

is

closed

today.这个商店今天不营业。（状态）（2)系表结构中的过去分词常有固定的介词搭配，被动语态结构中则没有。Miss

Wang

is

satisfied

with

us.

(系表结构）王老师对我们很满意。（3)系表结构中的过去分词可以被副词修饰。She's

so

worried

about

her

exams.

(系表结构）她非常担心她的考试。系表结构通常只有一般现在时和一般过去时，而被动语态可用于多种时态。New

products

are

being

made.新产品正在制造中。The

book

has

already

been

translated

into

many

languages.这本书已经被译成了许多种语言。The

meeting

will

be

put

off.

会议将延期。以上三个句子是被动语态，而不是系表结构。4、不能使用被动语态的情况（1)主动句的宾语是相互代词each

other

或反身代词时，不能用被动语态。①The

man

introduced

himself

as

Mr

White.

(主动语态）那个人自我介绍说他是怀特先生。②Himself

was

introduced

as

Mr

White.

(误）They

help

each

other

study

English.

(主动语态）他们互相帮助学习英语。Each

other

is

helped

to

study

English.

(误）（2）当主动句的谓语动词是表状态的及物动词时，不能用于被动语态。We

will

have

a

meeting.

(主动语态）我们打算开一个会。A

meeting

will

be

had

by

us.

(误）句的宾语是不定式或动名词时，不能作被动语态中的主语。①My

brother

enjoys

watching

TV.

(主动语态）我弟弟喜欢看电视。Watching

TV

is

enjoyed

by

my

brother.

(误）②He

asked

to

have

a

try.

(主动语态）他请求试一次。To

have

a

try

was

asked

by

him.

(误）（4）宾语是谓语动词的同源宾语时，不可用于被动语态。①They

live

a

happy

life.

他们过着幸福的生活。A

happy

life

is

lived

by

them.

(误）②The

girl

dreamed

a

sweet

dream.那个女孩做了个甜美的梦。A

sweet

dream

was

dreamed

by

the

girl.

(误）（5）宾语带有与主语有照应关系的物主代词时，不可用于被动语态。

①The

old

man

broke

his(=the

old

man's)legs.

(主动语态）那位老人把自己的腿摔断了。The

old

man's

legs

were

broken

by

him.

(误）②The

girl

shook

her(=the

girl's)head.

(主动语态）那个女孩摇了摇头。The

girl's

head

was

shaken

by

her.

(误）5、被动语态结构的习惯用法表示“据说”、“大家相信”、“众所周知”等的句型，由Itis+"believe/report/say/think/know.

.

.的过去分词＋that.

.

.

”构成。现在这些句型已成为习惯用法。

It

is

said

that.

.

.

据说······It

is

reported

that.

.

.

据报道······It

is

believed

that.

.大家相信...方法1

判断动作的执行者或承受者对于被动语态，试题主要是让大家能够找出动作的执行者或承受者，这就要根据句子的意思进行判断，然后根据句子中的时间作出正确的选择。1、Liu

Xiangby

his

coach

to

train

regularly.advised

advised

advised解析

句意：刘翔的教练建议他进行有规律的训练。本题考查被动语态。被动语态的结构为“be+动词的过去分词”，be根据不同的时态要发生相应的变化。根据句意可知用一般过去时的被动语态，故选C项。

2、－How

often

do

I

need

to

feed

the

dog?－Itfood

every

day,or

it

will

be

hungry.must

give

be

give

begiven

be

gave解析

句意：－我需要多久喂一次狗？－它必须每天喂，否则它会饿的。本题考查被动语态。含情态动词的被动语态的构成：情态动词＋be+过去分词。故正确答案为C.

方法2时态判断法被动语态的使用，离不开时态。所以应根据句中所提供的时间状语或上下文的暗示来分析判断应该使用哪种时态的被动语态。1、More

than

100

workersfrom

the

coal

mine

inApril

this

year.

B.saved

saved

saved解析

句意：今年四月份有一百多名工人被从矿井中救了上来。根据时间状语可知此处用一般过去时，而workers与save之间是被动关系，应用被动语态，故选D项。

2Are

you

going

to

the

party?－No,because

I

A.wasn't

invitedB.haven't

invitedC.didn't

inviteD.haven't

been

invited

解析

句意：－你去参加那个聚会吗？－不去，因为我还没有受到邀请。由语境可知应用现在完成时的被动语态，故选D.

1.Theweathermansaidmorestorms_______inJulyinthesouthofChina.A.wouldexpect B.wereexpected C.areexpected

解析：气象预报员说,预计7月份中国南方将有更多的暴风雨。考查宾语从句时态及语态。根据said可知,从句应用过去的时态,排除A选项;结合“morestorms...inJuly”可知,句子主语与动词之间是被动关系,应用过去时的被动,故选B。2.Mymothertoldmethatmyhomeworkmust________ontime. B.befinish C.befinished 解析：我母亲告诉我,我的家庭作业必须按时完成.可知myhomework作主语,所以推出此句是考查含有情态动词的被动语态,其基本结构是:情态动词+be+过去分词,故选C。3.Ayearhasfourseasonsandit_____twelvedifferentstarsigns.A.dividedinto B.isdividinginto C.isdividedinto D.dividinginto解析：一年有四个季节,它被分成12个不同的星座。dividesth.into:把某物分成,描述真实的情况要用一般现在时,根据句意可知要用被动语态,it是主语,故选C。4.Mom,sweepingrobots_____moreandmorewidely.Whynotbuyone?A.Use B.areused C.areusing D.wereused解析：use使用。选项A是动词原形;选项B是一般现在时被动语态;选项C是现在进行时;选项D是一般过去时被动语态。根据分析句子的时态是一般现在时,因此可排除C和D。句子的主语与谓语之间有被动关系,应用被动语态,因此本题正确答案是B。5.SpudWebb________atfirstbecauseofhisheight,buthedidn’tloseheart.A.refuses B.refused C.wasrefused D.willberefused解析：refuses第三人称单数形式;refused过去式/过去分词;wasrefused一般过去时态的被动语态;willberefused一般将来时态的被动语态。主语SpudWebb与动词refuse"拒绝"之间存在逻辑上的被动关系,即他被拒绝,故为被动语态。根据didn't可知,用一般过去时态的被动语态。故选:C。6.—TherearemoreandmoreConfuciusInstitutesinmanyothercountries.—Yes.Chinese________inthosecountries.IamproudofthatasaChinese. B.isspeaking C.isspoken 解析：根据语境,设空句主语Chinese(汉语)和其谓语speak(说)之间是被动关系,且题干表述的是现在的客观情况,因此设空处应用一般现在时态的被动语态,即isspoken符合语境。故选:C。’snotyourturnyet.Pleasewaitonthechairoverthereuntilyou________.A.arecalling B.havecalled C.arecalled 解析：本题考查被动语态。这里表达的意思是:你在那边椅子上等着,直到你被叫。应该用被动语态。选项A是现在进行时主动语态结构,选项B是现在完成时主动语态结构,选项D是一般过去时主动语态结构,所以都不对,只有选项C是一般现在时被动语态结构,符合要求,所以选C。8.—Doyouknowanythingaboutthe5Gmobilephone?—Sure.Thefirst5Gmobilephone________byHUAWEIin2018. B.isproduced D.wasproduced解析：根据in2018可知要用一般过去时,又因为“”和“生产”是被动关系,所以要用被动语态,其结构为bedone。故选:D。9.Thelittlegirl_____tocryatthestreetcornereveryday.A.sees B.isseeing C.isseen 解析：这个小女孩每天都在街角哭。考查一般现在时的被动语态。sees看见，第三人称单数；isseeing正在看，现在进行时，表示动作正在进行；isseentodo某人被看到做…….，表示看到了做一件事的全部；saw看见，过去式。此处主语“Thelittlegirl”和谓语动词“see”是逻辑上的动宾关系，因此用一般现在时的被动语态，表示小女孩每天都被人们看见在街角哭。故选C。10.—MayIgooutwithmyfriends,Mom?—Unlessyourhomework________.A.finish B.willfinishC.hasbeenfinished D.isfinished解析：考查被动语态。主语是“yourhomework”，应该是被完成，排除AB两个选项，强调结果对现在的影响，是做完作业才可以出去玩，应该用现在完成时的被动语态。故选C。11.Therearemanyrulesinourschool,forexample,eating________inourclassroom.A.arenotallowed B.isnotallowed C.allow解析：考查动词的语态。主语是eating和谓语动词之间存在被动关系，用一般现在时态的被动语态，其结构是bedone的形式，动名词做主语，be动词用单数is,allow的过去分词是allowed,此处是否定形式，故选B。12.Myfather________togiveupsmokingbecauseofhisbadhealthlastyear.A.isforced B.forced C.hasforced D.wasforced解析：考查动词的时态和语态。根据“lastyear”可知句子是一般过去时。根据“becauseofhisbadhealthlastyear”可知表达“因为健康状况不好被迫戒烟”，主语“Myfather”和动词“强迫”之间是被动关系，主语是单数概念，用一般过去时的被动结构“wasforced”，故选D.13.—Youboughtanewcar!AnAmericancar?—No.AChinesecar.It_______inTaizhou.A.makes B.made C.wasmade D.willbemade解析：本题主要考查被动语态。A动词第三人称单数形式；B动词过去式或过去分词；C一般过去时被动语态；D一般将来时的被动语态。分析句子结构，空格所在句主语为it，与谓语动词make为被动关系。根据文章对话第一段第一句中bought可知，句子时态为一般过去时。故此处为动词过去式的被动语态。故选C。故正确答案为C。14.Mostofthefoodwebuy________insomeways.A．processes B．isprocessed C．willprocess D．toprocess【详解】句意：我们购买的大部分食物都在某种程度上被加工过。考查被动语态。分析句子结构可知，主语“food”和谓语动词“process”之间是动宾关系，食物应是被加工，所以应用被动语态，其结构是“be+动词过去分词”。故选B。15.—Mom,isitOKformetowatchTVforawhile?—Sorry.WhynotwatchTVafteryourhomework________? C.ispleted D.willbepleted解析：根据题干中Sorry可知妈妈建议孩子作业完成后再看电视,其中该题干是对现在情况的描述,则应用一般现在时,其次homework和plete(完成)是被动关系,则此处应用一般现在时的被动语态,即主语+is/am/are+done,故选:C。16.Thefirst5Gmobilephone_________byHUAWEIin2018. C.isproduced D.wasproduced解析：主语Thefirst5Gmobilephone是动词produce的承受着,根据in2018可知用一般过去时的被动语态was/were+过去分词。故选:D。17.Heisverysurprisedthatallthehousesinthevillage___________white.C.arepainting D.arepainted解析：根据allthehousesinthevillage作主语,是动作的承受着,因为房子是不能自己刷上白色的,所以必须用被动语态,被动语态的构成:助动词be+及物动词的过去分词,故选:D。18.—MayIleavetheclassroomnow?—Yes,youmay.Ifyoufinishyourhomework,youwill_______toleavetheclassroom.A.allowed B.areallowed C.beallowed D.areallowing解析：Ifyoufinishyourhomework,youwill_____toleavetheclassroom.是if引导的条件状语从句，if表示如果，通常遵循“主将从现”的原则，则主句是一般将来时，其结构是主语+will+动词原形。其次主语you和谓语allow是被动关系，表示被允许，则此处应用一般将来时的被动语态，其结构是主语+willbedone,则此处应填写beallowed。故选：C。19.Trees________onbothsidesoftheroadnextyear.A.willplant B.willbeplanted C.aregoingtoplant D.areplanted解析：考查被动语态的用法。句意：明年在道路两边会种树。willplant将来时态的主动语态；willbeplanted将来时态的被动语态；aregoingtoplant将来时态的主动语态；areplanted现在时态的被动语态。本句中trees作主语，主语与动词之前是逻辑上的动宾关系，用被动语态；根据nextyear，可知为将来时态的被动语态，故选B。20.―Whenshallwegoandplaybasketball?

―Notuntilthework______tomorrow.A.willfinish B.hasfinishedC.isfinished D.willbefinished解析：考查动词语态辨析。finish完成，willfinish是其一般将来时结构，hasfinished是现在完成时，isfinished是其一般现在时的被动语态；willbefinished是一般将来时的被动语态。本句实际是until引导的时间状语从句(主句省略），时态遵循主将从现原则：同时work和动词finish是被动关系，需用“bedone”被动语态。work是不可数名词，系词需用is；根据句意结构，可知选C。21.StudentsinGradeNine_____amathsexamatthistimeyesterday.A.take B.aretaking C.weretaking D.havetaken解析：考查动词时态。昨天的这个时候,九年级的学生们正在进行数学考试。时间状语atthistimeyesterday"昨天这个时候"提示用过去进行时。故选C。22.Mr.Zhang_____mathsinthisschoolsincehefinishedcollegefiveyearsago.A.teaches B.isteaching C.willteach D.hasbeenteaching解析：自从五年前大学毕业以来,张老师一直在这所学校教数学。由句意及since知,本句用现在完