中小学教育资源及组卷应用平台
英语情态动词练习
1.—Tony
_______
what
I
did
upsetting
although
he
didn’t
say
anything.
—So
you
see
you
will
have
to
make
an
apology
for
him?
A.
could
find
B.
should
have
found
C.
might
find
D.
must
have
found
2.Traveling
(?http:?/??/?www.21cnjy.com?)by
subway
______
sometimes
be
quite
an
adventure,
especially
during
the
rush
hour.21世纪教育网版权所有
A.
must
B.
can
C.
shall
D.
should
3.He
______
writing
(?http:?/??/?www.21cnjy.com?)the
paper
now.
He
hadn’t
written
a
single
word
when
I
left
him
ten
minutes
ago.21·cn·jy·com
A.
shouldn’t
be
B.
can’t
have
finished
C.
can’t
be
D.
mustn’t
have
finished
4.You
can’t
imagine
(?http:?/??/?www.21cnjy.com?)that
a
well
–behaved
gentleman
______
be
so
rude
to
a
lady.2·1·c·n·j·y
A.
might
B.
need
C.
should
D.
would
5.--
Difficulties
always
go
with
me!
---
Cheer
up!
I
(?http:?/??/?www.21cnjy.com?)f
God
closes
door
in
front
of
you,
there
be
a
window
opened
for
you.【来源：21·世纪·教育·网】
A.
must
B.
would
C.
could
D.
can
6.If
you
turn
(?http:?/??/?www.21cnjy.com?)off
the
lights,
the
screen
of
the
computer
______
be
more
clear.21·世纪
教育网
A.
must
B.
has
to
C.
is
to
D.
can
7.—I
heard
they
went
skiing
in
the
mountains
last
winter.
—It
true
because
there
was
little
snow
there.
A.
may
be
not
B.
won’t
be
C.
couldn’t
be
D.
mustn’t
be
8.--
Catherine,
I
have
cleaned
the
room
for
you.
---Thanks.
You
_______
it.
I
could
manage
it
myself.www-2-1-cnjy-com
A.
needn’t
do
B.
shouldn’t
have
done
C.
mustn’t
do
D.
needn’t
have
done
9.---
_____
I
go
out
to
play
now,
Mum?
---No,
you
_____.
You
should
do
your
homework
first.www.21-cn-jy.com
A.
May;
had
better
not
B.
Must;
wouldn’t
C.
May;
needn’t
D.
Must;
mustn’t
10.—Where
is
my
dictionary?I
remember
I
put
it
here
yesterday.
—You___it
in
the
wrong
place.
A.
must
put
B.
should
have
put
C.
might
put
D.
might
have
put
11.—Look
at
these
tracks.
It
________
be
a
wolf.
I’m
sure
about
it.
—You
are
right!
We
have
to
be
careful.
A.
may
B.
must
C.
can’t
D.
shouldn’t
12.——I
called
you
last
night,
but
no
one
answered.
2-1-c-n-j-y
——Sorry,
I____________
sleeping.
A.
need
have
been
B.
would
have
been
C.
must
have
been
D.
should
have
been
13.Frankly
speaking,
I
(?http:?/??/?www.21cnjy.com?)
am
not
sure
whether
I
________
this
in
the
old
days
with
that
kind
of
equipment,
which
looks
quite
odd
and
ridiculous.
A.
should
have
done
B.
need
have
done
C.
would
have
done
D.
must
have
done
14.According
to
the
la
(?http:?/??/?www.21cnjy.com?)w
in
our
city,
the
money
_____
be
divided
between
you
two.21cnjy.com
A.
will
B.
should
C.
shall
D.
need
15.Last
week,
w
(?http:?/??/?www.21cnjy.com?)e
visited
the
Three
Gorges
Dam,________is
the
greatest
key
water
control
project
in
the
world
at
present.
A.
that
B.
which
C.
what
D.
where
16.You
______
have
been
out
last
night,
for
all
the
lights
in
your
room
were
not
on.21
cnjy
com
A.
need
B.
must
C.
may
D.
should
17.It’s
nearly
7
o’clock.
Jack
____________
be
here
at
any
moment.
A.
shall
B.
had
to
C.
ought
to
D.
have
to
18.—
Isn’t
that
Ann’s
husband
over
there?
—
No,
it
________
be
him
—
I’m
sure
he
doesn’t
wear
glasses.
A.
must
not
B.
can’t
C.
won’t
D.
may
not
19.The
weather
(?http:?/??/?www.21cnjy.com?)
turned
out
to
be
fine
yesterday.
I
____________
the
trouble
to
carry
my
umbrella
with
me.21教育网
A.
should
have
taken
B.
could
have
taken
C.
needn’t
have
taken
D.
mustn’t
have
taken
20.(2018·北京)
In
today
(?http:?/??/?www.21cnjy.com?)’s
information
age,
the
loss
of
data
_________
cause
serious
problems
for
a
company.【来源：21cnj
y.co
m】
A.
need
B.
should
C.
can
D.
must
21世纪教育网
www.21cnjy.com
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21世纪教育网(www.21cnjy.com)中小学教育资源及组卷应用平台
英语情态动词练习
1.It’s
especially
i
(?http:?/??/?www.21cnjy.com?)mportant
that
every
piece
of
equipment
________
be
checked
before
the
experiment.21世纪教育网版权所有
A.
would
B.
could
C.
should
D.
might
答案及解析：C
句意：实验前每一件设备都应该被检查
(?http:?/??/?www.21cnjy.com?)一遍是很重要的。A.
would将会；B.
could能；C.
should应该；D.
might可能。根据“be
checked
before
the
experiment”可知，每一件设备都应该在实验前被检查一遍，故C项正确。21cnjy.com
2.From
her
knowl
(?http:?/??/?www.21cnjy.com?)edge
of
Douglas's
habits，she
feels
quite
sure
that
the
attacker
yesterday
___________Douglas.21·cn·jy·com
A.
mustn't
have
been
B.
can't
have
been
C.
shouldn't
have
been
D.
wouldn't
have
been
答案及解析：B
句意：从她的Douglas的习惯知识
(?http:?/??/?www.21cnjy.com?)，她觉得昨晚的攻击者不可能是Douglas。根据句中feels
sure
和last
night可知，这是对过去事情有把握的否定推测。固定结构：can’t
have
done“不可能做了某事”，表示对过去有把握的否定推测。故选B。【来源：21·世纪·教育·网】
3.---
I
stayed
at
a
hotel
while
in
New
York.
---
Oh,
did
you?
Yo
(?http:?/??/?www.21cnjy.com?)u
_____
with
my
sister
Barbara.
She
has
a
nice
apartment
in
downtown
Manhattan.www-2-1-cnjy-com
A.
might
stay
B.
could
have
stayed
C.
should
stay
D.
must
have
stayed
答案及解析：B
句意：——我在纽约期间住在一家旅馆里。—
(?http:?/??/?www.21cnjy.com?)—哦,是吗?你本可以和我妹妹芭芭拉住在一起。她在曼哈顿市中心有一套很好的公寓。根据题干的时态判断说明是现在谈论过去的事情，因此要用情态动词＋have
done
的形式。且根据句意可知表示“本来可以但实际并没有”应用could
have
done。故选B。【出处：21教育名师】
4.You
_____never
(?http:?/??/?www.21cnjy.com?)
work
too
hard
in
learning
a
language.
That’s
what
it
takes
to
learn
a
language
well.【版权所有：21教育】
A.
must
B.
can
C.
will
D.
may
答案及解析：B
句意：学习语言再怎么努力也不过
(?http:?/??/?www.21cnjy.com?)分。这就是学好一门语言所需要的。A.
must必须；B.can能够；C.
will将会；D.
may可能。固定短语can't(can?never)??too?“再……也不为过”，符合语境及句子结构，故选B。
5.-–Mary
knows
the
city
quite
well.
--She______
well
have
been
there
before.
A.
need
B.
could
C.
should
D.
may
答案及解析：D
句意：Mary非常了解这个
(?http:?/??/?www.21cnjy.com?)城市。---她肯定以前在这里呆过。may
have
done过去可能做过某事。表示对过去的肯定猜测。need
have
done本需要做某事却没做；could
have
done本可以做某事却没做；should
have
done本应该做某事却没做。故选D。2·1·c·n·j·y
考点：考查情态动词辨析。
6.I’m
sorry,
but
you
_____
go
wrong.
There’s
no
such
man
here.
A.
need
B.
can
C.
must
D.
will
答案及解析：C
句意：很抱歉，但是你一定是弄错了。这儿没有这
(?http:?/??/?www.21cnjy.com?)么个人。A.
need需要；B.
can能够；C.
must必须；D.
will将会。must指有把握的推测，“一定；必定”，结合下文There’s
no
such
man
here.可知一定是弄错了。故选C。21
cnjy
com
7.Students
____
remai
(?http:?/??/?www.21cnjy.com?)n
in
their
seats
until
all
the
papers
have
been
collected
according
to
the
regulation.
A.
would
B.
shall
C.
will
D.
could
答案及解析：B
句意：学生们必须呆在自己的座位上，
(?http:?/??/?www.21cnjy.com?)直到所有的试卷都被收回。根据句意，“学生们呆在自己的座位上”是一项规定。shall
可表示某种规定或义务，用于第二、三人称的句子中。而其他情态动词无此用法。故正确答案为B。
8.Look!
There
are
(?http:?/??/?www.21cnjy.com?)
so
many
mistakes
in
your
composition.
You
________
have
fixed
full
attention
on
it.
A.
can
B.
should
C.
need
D.
might
答案及解析：B
句意：看！你的作文里有那么多的错误。你
(?http:?/??/?www.21cnjy.com?)本应该把所有的注意力都集中在它上面的。表示“本应该做但实际上没有做”应该用should
have
done结构，故选B。
9.---We
want
someone
to
design
the
new
art
museum
for
me.
---_____
the
young
fellow
have
a
try?
A.
Shall
B.
May
C.
Will
D.
Need
答案及解析：A
句意：——我们想找人为我设
(?http:?/??/?www.21cnjy.com?)计一个新的艺术博物馆。——是不是让这位年轻小伙子试一试？shall作为情态动词,用于二三人称,表示"询问"，"警告"，"允诺"，"命令"，"决心"，"强制"等语气。will作为情态动词，用于主语是各种人称的陈述句中，表示"意愿"和"倾向"。用于第二人称的疑问句中，表"请求"。故选A。
10.(2019·江西六所重点高中一
(?http:?/??/?www.21cnjy.com?)模)We
________
take
clean
drinking
water
for
granted.
One
day
we
may
run
out
of
it.21·世纪
教育网
A.
needn't
B.
can't
C.
won't
D.
shouldn't
答案及解析：D
句意：我们不应该把拥有洁净的饮用水看作是理所当然的。也许有一天，我们会用完它。shouldn't“不应该”，符合句意。
11.I
still
rememb
(?http:?/??/?www.21cnjy.com?)er
my
happy
childhood
when
my
mother
___________
take
me
to
Disneyland
at
weekends.【来源：21cnj
y.co
m】
A.
might
B.
must
C.
would
D.
should
答案及解析：C
句意：我仍然记得我幸福的童年，那时妈
(?http:?/??/?www.21cnjy.com?)妈会在周末的时候带我去迪士尼乐园。A.might可能；B.must必须；C.would将，会；D.should应该。would可以表示“过去常常”，强调过去经常发生的事情。根据语境判断此处指过去妈妈经常在周末带他去。故选C项。
12.—I
feel
a
little
nervous.
—Take
it
easy
You
__________
have
difficulty
passing
the
exam
when
you
have
prepared
for
it
well.
A.
mustn’t
B.
needn’t
C.
may
not
D.
shouldn’t
答案及解析：D
句意：——我觉得有点紧张。——不要着
(?http:?/??/?www.21cnjy.com?)急。当你准备充分时，通过考试应该不会有困难。A.
mustn’t禁止，不允许；B.
needn’t不必；C.
may
not可能不会；D.
shouldn’t不应该。结合句意可知答案为D。
13.—
Excuse
me,
do
you
mind
if
I
open
the
window?
—
Well,
if
you
__________.
I
can
put
on
more
clothes.2-1-c-n-j-y
A.
can
B.
may
C.
must
D.
shall
答案及解析：C
句意：-不好意思，我把窗
(?http:?/??/?www.21cnjy.com?)户打开你介意吗?-
好吧，如果你必须这么做的话。我可以多穿点衣服。A.
can能够；B.
may可能；C.
must一定；必须；D.
shall会；将。must表示偏要，必须要做的事情，故选C。21
cnjy
com
14.
—Where
is
my
dictionary?I
remember
I
put
it
here
yesterday.
—You___it
in
the
wrong
place.
A.
must
put
B.
should
have
put
C.
might
put
D.
might
have
put
答案及解析：D
句意：——我的词典在哪里？我记得
(?http:?/??/?www.21cnjy.com?)昨天放在这里了。——你或许放错了地方。“might
have
+动词+ed形式”表示过去可能完成的动作。根据所提供的情景Where
is
my
dictionary?
I
remember
I
put
it
here
yesterday.可判断出把词典放在某个地方发生在过去，所以要用“might
have
+动词+ed形式”。“should
have
+
动词+ed形式”表示“(过去)本来应该做某事”。must意为“一定”，是肯定的推测，与所提供的情景的矛盾。might
put表示现在发生的事。故选D。
15.Tourists
who
ent
(?http:?/??/?www.21cnjy.com?)er
the
quiet
area
_____
obey
the
rule
to
reduce
any
potential
effect
on
the
environment.
A.
can
B.
may
C.
shall
D.
dare
答案及解析：C
句意：进入安静区域的游客应遵守规
(?http:?/??/?www.21cnjy.com?)则，减少对环境的潜在影响。shall在陈述句中用于第二、三人称，表示说话者的允诺、告诫、威胁、命令、规定、必然性等。此处shall表示告诫。故选C。
16.Schools
have
(?http:?/??/?www.21cnjy.com?)
been
lengthening
the
school
day
to
raise
test
marks,
which
________
be
costly
if
schools
need
air
conditioning
on
hot
days.
A.
might
B.
can
C.
dare
D.
need
答案及解析：B
句意：学校延长教学时间来提高学生的成绩，要
(?http:?/??/?www.21cnjy.com?)是在天热的时候，需要开空调这样的做法可能会花费更多的钱。A.
might或许，大概；B.
can很可能；C.
dare敢；D.
need需要。此处can是情态动词，表示“一时的可能性”，故选B。
17.More
and
more
c
(?http:?/??/?www.21cnjy.com?)ountries
have
come
to
realize
that
the
world____
do
without
Huawei
and
its
"more
advanced"
technology.
A.
can’t
B.
needn’t
C.
mustn’t
D.
shouldn't
答案及解析：A
句意：越来越多的国家意识到世界上离不
(?http:?/??/?www.21cnjy.com?)开华为和它更先进的科技。A.
can’t不能；B.
needn’t不需要；C.
mustn’t一定不能；D.
shouldn't不应该。can’t
do
without意为“离不开”，为固定搭配。故选A。
18.—Tony
_______
what
I
did
annoying
though
he
didn’t
say
anything.
—So
you
think
you
will
have
to
make
an
apology?
A.
could
find
B.
should
have
found
C.
might
find
D.
must
have
found
答案及解析：D
句意：—Tony一定觉得我做的事
(?http:?/??/?www.21cnjy.com?)很烦人，尽管他什么也没说。—所以你认为你得道歉?此处是对过去事情有把握的推测，must
have
done“一定是做某事了”，故选D。21教育名师原创作品
19.Frankly
spe
(?http:?/??/?www.21cnjy.com?)aking,
I
am
not
sure
whether
I
________
this
in
the
old
days
with
that
kind
of
equipment,
which
looks
quite
odd
and
ridiculous.
A.
should
have
done
(?http:?/??/?www.21cnjy.com?)
B.
need
have
done
C.
would
have
done
D.
must
have
donewww.21-cn-jy.com
答案及解析：C
句意：坦率地说，我不确定在过去我是否会用这
(?http:?/??/?www.21cnjy.com?)种设备做这件事，这看起来很奇怪和可笑。A.
should
have
done表示本应该做某事，而实际上没有做某事；B.
need
have
done表示本来需要做某事而没有做；C.
would
have
done虚拟语气，表示对过去事情的假设，意思是“本来会做”；D.
must
have
done表示对过去事情的肯定推测，译成“一定做过某事”，故选C。
20.---Artistic
people
can
be
very
difficult
sometimes.21教育网
---Well,
you______know---you
married
one.
A.
might
B.
would
C.
shall
D.
should
答案及解析：D
A.
might可能，也许；B.
w
(?http:?/??/?www.21cnjy.com?)ould将会；C.
shall必须，会；D.
should应该。句意：---有艺术修养的人有时很难相处。---你应当知道这一点，因为你结婚那位就是搞艺术的。这里是按照常理推断，用should。
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英语情态动词练习
1.It’s
especially
im
(?http:?/??/?www.21cnjy.com?)portant
that
every
piece
of
equipment
________
be
checked
before
the
experiment.21世纪教育网版权所有
A.
would
B.
could
C.
should
D.
might
2.From
her
kno
(?http:?/??/?www.21cnjy.com?)wledge
of
Douglas's
habits，she
feels
quite
sure
that
the
attacker
yesterday
___________Douglas.21·世纪
教育网
A.
mustn't
have
been
B.
can't
have
been
C.
shouldn't
have
been
D.
wouldn't
have
been
3.---
I
stayed
at
a
hotel
while
in
New
York.
---
Oh,
did
(?http:?/??/?www.21cnjy.com?)you?
You
_____
with
my
sister
Barbara.
She
has
a
nice
apartment
in
downtown
Manhattan.21
cnjy
com
A.
might
stay
B.
could
have
stayed
C.
should
stay
D.
must
have
stayed
4.You
_____never
(?http:?/??/?www.21cnjy.com?)work
too
hard
in
learning
a
language.
That’s
what
it
takes
to
learn
a
language
well.【来源：21cnj
y.co
m】
A.
must
B.
can
C.
will
D.
may
5.-–Mary
knows
the
city
quite
well.
--She______
well
have
been
there
before.
A.
need
B.
could
C.
should
D.
may
6.I’m
sorry,
but
you
_____
go
wrong.
There’s
no
such
man
here.
A.
need
B.
can
C.
must
D.
will
7.Students
____
remain
in
their
seats
until
all
the
papers
have
been
collected
according
to
the
regulation.2-1-c-n-j-y
A.
would
B.
shall
C.
will
D.
could
8.Look!
There
ar
(?http:?/??/?www.21cnjy.com?)e
so
many
mistakes
in
your
composition.
You
________
have
fixed
full
attention
on
it.【出处：21教育名师】
A.
can
B.
should
C.
need
D.
might
9.---We
want
someone
to
design
the
new
art
museum
for
me.
---_____
the
young
fellow
have
a
try?
A.
Shall
B.
May
C.
Will
D.
Need
10.(2019·江西六所
(?http:?/??/?www.21cnjy.com?)重点高中一模)We
________
take
clean
drinking
water
for
granted.
One
day
we
may
run
out
of
it.21cnjy.com
A.
needn't
B.
can't
C.
won't
D.
shouldn't
11.I
still
remember
(?http:?/??/?www.21cnjy.com?)
my
happy
childhood
when
my
mother
___________
take
me
to
Disneyland
at
weekends.www-2-1-cnjy-com
A.
might
B.
must
C.
would
D.
should
12.—I
feel
a
little
nervous.
—Take
it
easy
You
__________
have
difficulty
passing
the
exam
when
you
have
prepared
for
it
well.www.21-cn-jy.com
A.
mustn’t
B.
needn’t
C.
may
not
D.
shouldn’t
13.—
Excuse
me,
do
you
mind
if
I
open
the
window?
—
Well,
if
you
__________.
I
can
put
on
more
clothes.【来源：21·世纪·教育·网】
A.
can
B.
may
C.
must
D.
shall
14.
—Where
is
my
dictionary?I
remember
I
put
it
here
yesterday.
—You___it
in
the
wrong
place.
A.
must
put
B.
should
have
put
C.
might
put
D.
might
have
put
15.Tourists
who
(?http:?/??/?www.21cnjy.com?)
enter
the
quiet
area
_____
obey
the
rule
to
reduce
any
potential
effect
on
the
environment.21教育网
A.
can
B.
may
C.
shall
D.
dare
16.Schools
ha
(?http:?/??/?www.21cnjy.com?)ve
been
lengthening
the
school
day
to
raise
test
marks,
which
________
be
costly
if
schools
need
air
conditioning
on
hot
days.
A.
might
B.
can
C.
dare
D.
need
17.More
and
mor
(?http:?/??/?www.21cnjy.com?)e
countries
have
come
to
realize
that
the
world____
do
without
Huawei
and
its
"more
advanced"
technology.2·1·c·n·j·y
A.
can’t
B.
needn’t
C.
mustn’t
D.
shouldn't
18.—Tony
_______
what
I
did
annoying
though
he
didn’t
say
anything.
—So
you
think
you
will
have
to
make
an
apology?
A.
could
find
B.
should
have
found
C.
might
find
D.
must
have
found
19.Frankly
speaki
(?http:?/??/?www.21cnjy.com?)ng,
I
am
not
sure
whether
I
________
this
in
the
old
days
with
that
kind
of
equipment,
which
looks
quite
odd
and
ridiculous.
A.
should
have
d
(?http:?/??/?www.21cnjy.com?)one
B.
need
have
done
C.
would
have
done
D.
must
have
done【版权所有：21教育】
20.---Artistic
people
can
be
very
difficult
sometimes.21·cn·jy·com
---Well,
you______know---you
married
one.
A.
might
B.
would
C.
shall
D.
should
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英语情态动词练习
1.—Tony
_______
what
I
did
upsetting
although
he
didn’t
say
anything.
—So
you
see
you
will
have
to
make
an
apology
for
him?
A.
could
find
B.
should
have
found
C.
might
find
D.
must
have
found
答案及解析：D
句意：—Tony一定觉得
(?http:?/??/?www.21cnjy.com?)我做的事很烦人，尽管他什么也没说。—所以你认为你得道歉吗?。由“what
I
did”可知，此处是对过去事情有把握的推测，must
have
done“一定是做某事了”。故选D项。
2.Traveling
by
sub
(?http:?/??/?www.21cnjy.com?)way
______
sometimes
be
quite
an
adventure,
especially
during
the
rush
hour.21教育网
A.
must
B.
can
C.
shall
D.
should
答案及解析：B
句意：乘地铁旅行有时可能相当冒险，尤其是在交通高峰期。A.
must必须；一定；B.
can能够；可能；C.
shall将会；D.
should应该；应当。本句中can表示客观可能性（客观原因形成能力），故选B。
3.He
______
writ
(?http:?/??/?www.21cnjy.com?)ing
the
paper
now.
He
hadn’t
written
a
single
word
when
I
left
him
ten
minutes
ago.21cnjy.com
A.
shouldn’t
be
B.
can’t
have
finished
C.
can’t
be
D.
mustn’t
have
finished
答案及解析：B
句意：他现在不可能写完了卷子。我十分钟之前留
(?http:?/??/?www.21cnjy.com?)下他时，他还没有写一个字。根据句意可知，此处考查对过去情况的否定推测，其表达为can’t
have
done不可能做某事，故选B项。2·1·c·n·j·y
4.You
can’t
(?http:?/??/?www.21cnjy.com?)imagine
that
a
well
–behaved
gentleman
______
be
so
rude
to
a
lady.【来源：21·世纪·教育·网】
A.
might
B.
need
C.
should
D.
would
答案及解析：C
句意:
你无法想象一个行为良好的绅士会
(?http:?/??/?www.21cnjy.com?)对一位女士如此粗鲁A.
might可能；B.
need需要
；C.
should竟然；
D.
would会。由You
can’t
imagine
that
a
well
–behaved
gentleman.
可知，should“竟然”符合句意。故选项C项。21·世纪
教育网
5.--
Difficulties
always
go
with
me!
---
Cheer
up!
(?http:?/??/?www.21cnjy.com?)
If
God
closes
door
in
front
of
you,
there
be
a
window
opened
for
you.2-1-c-n-j-y
A.
must
B.
would
C.
could
D.
can
答案及解析：A
句意：——困难总是伴随着我！
(?http:?/??/?www.21cnjy.com?)——高兴点!
如果上帝在你面前关上了门，一定有一扇窗户为你打开。A.
must必须；B.
would将要；C.
could能，会；D.
can能，会。must表示对现在的状态推测时，意为“一定”，表示可能性很大的推测。符合语境。故选A。【来源：21cnj
y.co
m】
6.If
you
turn
off
the
(?http:?/??/?www.21cnjy.com?)
lights,
the
screen
of
the
computer
______
be
more
clear.【出处：21教育名师】
A.
must
B.
has
to
C.
is
to
D.
can
答案及解析：D
句意：如果你把灯关掉，电脑的屏
(?http:?/??/?www.21cnjy.com?)幕可能会更清晰。A.
must必须；B.
has
to不得不；C.
is
to将要；D.
can可能。此处表示一种客观事实的推测，“可能”，故选D项。【版权所有：21教育】
7.—I
heard
they
went
skiing
in
the
mountains
last
winter.
—It
true
because
there
was
little
snow
there.
A.
may
be
not
B.
won’t
be
C.
couldn’t
be
D.
mustn’t
be
答案及解析：C
。句意：我听说他们去年冬天去山里滑雪。-
(?http:?/??/?www.21cnjy.com?)-不可能是真的，因为那里几乎没有雪。A.
may
be
not可能不；B.
won’t
be
不会；C.
couldn’t
be不可能是；
D.
mustn’t
be禁止。根据because
there
was
little
snow
there.可知这里是否定推测，couldn’t
be“不可能是”符合句意，故选C项。21·cn·jy·com
8.--
Catherine,
I
have
cleaned
the
room
for
you.
---Thanks.
You
_______
it.
I
could
manage
it
myself.www-2-1-cnjy-com
A.
needn’t
do
B.
shouldn’t
have
done
C.
mustn’t
do
D.
needn’t
have
done
答案及解析：D
句意:
---凯瑟琳，我已经为你打扫了房
(?http:?/??/?www.21cnjy.com?)间。
-
-
-谢谢。你本不必这么做的。我自己能行。A.
needn’t
do不必做某事；B.
shouldn’t
have
done本不应该做某事；
C.
mustn’t
do禁止做某事；D.
needn’t
have
done本不必做某事。由“Thanks.
I
could
manage
it
myself”可知，needn’t
have
done“
本不必做某事，而实际上做了某事”符合句意。故选D项。
9.---
_____
I
go
out
to
play
now,
Mum?
---No,
you
_____.
You
should
do
your
homework
first.
A.
May;
had
better
not
B.
Must;
wouldn’t
C.
May;
needn’t
D.
Must;
mustn’t
答案及解析：A
句意：---妈妈，我现在可以出去玩吗？---
(?http:?/??/?www.21cnjy.com?)不，你最好不要。你应该先做作业。A.
May可以，had
better
not
最好不；B.
Must必须，
wouldn’t
不会；
C.
May可以，
needn’t不必；
D.
Must必须，mustn’t
禁止。must必须；may可以；根据回答“You
should
do
your
homework
first.”可知问句是表请求，故第一空填may“可以”，第二个空填had
better
not“最好不要”。故选A。
10.—Where
is
my
dictionary?I
remember
I
put
it
here
yesterday.
—You___it
in
the
wrong
place.
A.
must
put
B.
should
have
put
C.
might
put
D.
might
have
put
答案及解析：D
句意：——我的词典在哪里
(?http:?/??/?www.21cnjy.com?)？我记得昨天放在这里了。——你或许放错了地方。“might
have
+动词+ed形式”表示过去可能完成的动作。根据所提供的情景Where
is
my
dictionary?
I
remember
I
put
it
here
yesterday.可判断出把词典放在某个地方发生在过去，所以要用“might
have
+动词+ed形式”。“should
have
+
动词+ed形式”表示“(过去)本来应该做某事”。must意为“一定”，是肯定的推测，与所提供的情景的矛盾。might
put表示现在发生的事。故选D。21
cnjy
com
11.—Look
at
these
tracks.
It
________
be
a
wolf.
I’m
sure
about
it.
—You
are
right!
We
have
to
be
careful.
A.
may
B.
must
C.
can’t
D.
shouldn’t
答案及解析：B
句意：——看这些脚印。一定是一只狼。
(?http:?/??/?www.21cnjy.com?)我敢肯定。——你是对的!我们必须小心。A.
may可能；B.
must一定；C.
can’t不能；D.
shouldn’t不应该；应该不会。根据下文I’m
sure
about
it.可知为肯定的猜测。故选B。
12.——I
called
you
last
night,
but
no
one
answered.
——Sorry,
I____________
sleeping.
A.
need
have
been
B.
would
have
been
C.
must
have
been
D.
should
have
been
答案及解析：C
句意：——我昨晚给你打电话了
(?http:?/??/?www.21cnjy.com?)，但没人接。——对不起，我一定是睡着了。这里在对过去的一件事情进行推测。固定结构：must
have
done表示对过去事情有把握的肯定推测。故选C。21
cnjy
com
13.Frankly
speakin
(?http:?/??/?www.21cnjy.com?)g,
I
am
not
sure
whether
I
________
this
in
the
old
days
with
that
kind
of
equipment,
which
looks
quite
odd
and
ridiculous.
A.
should
have
done
B.
need
have
done
C.
would
have
done
D.
must
have
done
答案及解析：C
句意：坦率地说，我不确定在过去我是否会用这
(?http:?/??/?www.21cnjy.com?)种设备做这件事，这看起来很奇怪和可笑。A.
should
have
done表示本应该做某事，而实际上没有做某事；B.
need
have
done表示本来需要做某事而没有做；C.
would
have
done虚拟语气，表示对过去事情的假设，意思是“本来会做”；D.
must
have
done表示对过去事情的肯定推测，译成“一定做过某事”，故选C。
14.According
(?http:?/??/?www.21cnjy.com?)to
the
law
in
our
city,
the
money
_____
be
divided
between
you
two.
A.
will
B.
should
C.
shall
D.
need
答案及解析：C
句意：根据我们城市的法律，这笔钱
(?http:?/??/?www.21cnjy.com?)将由你们两人平分。A.
will将；B.
should应该；C.
shall将会；D.
need需要。根据句意和the
law可知这里表示“法律，法规”规定，用shall。故选C。
15.Last
week,
(?http:?/??/?www.21cnjy.com?)
we
visited
the
Three
Gorges
Dam,________is
the
greatest
key
water
control
project
in
the
world
at
present.
A.
that
B.
which
C.
what
D.
where
答案及解析：B
句意：上周，我们参观了三峡大坝，这是目前世
(?http:?/??/?www.21cnjy.com?)界上最大的水利枢纽工程。________is
the
greatest
key
water
control
project
in
the
world
at
present是非限制性定语从句，修饰the
Three
Gorges
Dam，先行词在从句中作主语，指物，应用关系代词which引导该从句。故选B。
16.You
______
have
(?http:?/??/?www.21cnjy.com?)
been
out
last
night,
for
all
the
lights
in
your
room
were
not
on.
A.
need
B.
must
C.
may
D.
should
答案及解析：B
句意：昨天晚上你肯定出去了，因为你房间的
(?http:?/??/?www.21cnjy.com?)灯一整晚都没开。A.
need需要；B.
must必须，肯定；C.
may可能；D.
should应该。结合句意可知，本句考查对过去情况的肯定推测，其表达是must
have
done“肯定做了……”，故选B项。
17.It’s
nearly
7
o’clock.
Jack
____________
be
here
at
any
moment.
A.
shall
B.
had
to
C.
ought
to
D.
have
to
答案及解析：C
句意：现在已经七点钟了。
(?http:?/??/?www.21cnjy.com?)杰克应该会随时出现的。ought
to＂应当＂，表示推测和可能性；shall常用于主语是第一人称的句子中，如果主语是第二、三人称，则表示＂责备，警告＂等；have
to＂必须＂，强调客观需要。根据句意。故选C。
18.—
Isn’t
that
Ann’s
husband
over
there?
—
No,
it
________
be
him
—
I’m
sure
he
doesn’t
wear
glasses.
A.
must
not
B.
can’t
C.
won’t
D.
may
not
答案及解析：B
句意：那不是安的丈夫吗？---
(?http:?/??/?www.21cnjy.com?)不，肯定不是他，我确定他不戴眼镜。A.
must
not禁止;B.
can’t
不能;C.
won’t不会;D.
may
not可能不。表示否定的推测，不可能，用can’t。故选B项。www.21-cn-jy.com
19.The
weather
(?http:?/??/?www.21cnjy.com?)
turned
out
to
be
fine
yesterday.
I
____________
the
trouble
to
carry
my
umbrella
with
me.21教育名师原创作品
A.
should
have
taken
B.
could
have
taken
C.
needn’t
have
taken
D.
mustn’t
have
taken
答案及解析：C
句意：昨天天气很好，你本不必带着你的雨伞的。needn’t
have
done“表示本来不必要做某事但是却做了”。符合句意。故选C项。
20.(2018·北京)
In
to
(?http:?/??/?www.21cnjy.com?)day’s
information
age,
the
loss
of
data
_________
cause
serious
problems
for
a
company.21世纪教育网版权所有
A.
need
B.
should
C.
can
D.
must
答案及解析：C
句意：在今天的信息时代，
(?http:?/??/?www.21cnjy.com?)数据的丢失有时会对一个公司造成严重的问题。数据丢失造成严重问题是客观上会发生的情况，即“客观可能性”，故该空应用情态动词can。C选项正确。其余情态动词均没有该用法。need需要；should应该，竟然；must必须，肯定。
点睛：can的基本用法：1.
(?http:?/??/?www.21cnjy.com?)
(表示能力、功能)能，会；2.
(表示推测)可能，可能会；3.（表示允许，请求）可以；4.（表示客观可能性）有时会。
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