must
modal
noun
məst
modal
1
had to
past
tense
to
have
to
do
something
because
it
is
necessary
or
important,
or
because
of
a
law
or
order
必须;
All
passengers
must
wear
seat
belts.
所有乘客都必须系安全带。
It’s
getting
late.
I
really
must
go.
天晚了,我真的必须走了。
You
must
work
hard.
你必须努力工作。
We
must
all
be
patient.
我们都必须耐心。
Must
I
pay
now?
我必须现在付款吗?
For
the
engine
to
work,
the
green
lever
must
be
in
the
‘up’
position.
要启动引擎,绿色操纵杆必须在“上”的位置。
Accidents
must
be
reported
to
the
safety
officer.
事故必须向安全员报告。
2
used
in
negative
sentences
to
say
that
something
should
not
happen,
because
of
a
rule
or
law
or
because
of
the
situation
〔用于否定句中,指法规、法律规定或形势决定某事不应发生〕
You
mustn’t
talk
to
your
mother
like
that.
你不应该那样和你母亲说话。
This
book
must
not
be
removed
from
the
library.
本书不得带出图书馆。
We
must
never
forget
how
much
we
owe
to
these
brave
men.
我们决不能忘记要对这些勇士心存感激。
No
one
must
disturb
him
while
he’s
sleeping.
他睡觉时谁也不准打扰他。
3
used
to
say
you
think
something
is
very
likely
to
be
true
or
very
likely
to
have
happened
一定,肯定〔表示推测〕
Sam
must
be
nearly
90
years
old
now.
萨姆现在肯定将近九十岁了。
His
new
car
must
have
cost
around
£20,000.
他的新车肯定花了两万英镑左右。
You
must
have
been
really
upset.
你一定很难过。
There
must
be
something
wrong
with
the
engine.
一定是引擎出了问题。
Karl
must’ve
seen
‘Star
Wars’
six
or
seven
times.
《星球大战》卡尔一定看过六七次了。
4
used
to
suggest
that
someone
should
do
something,
especially
because
you
think
they
will
enjoy
it
or
you
think
it
is
a
good
idea
[尤英,口] 应该〔建议别人做某事,尤因为你觉得他们会喜欢,或你认为这是个好主意〕
especially BrE spoken
You
must
come
and
stay
with
us
in
London
sometime.
你一定得找个时间来伦敦到我们这儿住住。
‘We
must
do
this
again,’
he
said.
‘I’ve
enjoyed
it
thoroughly.’
“我们一定要再来一次,”他说,“我玩得太开心了。”
5
used
to
say
that
you
intend
or
want
to
do
something
一定要〔表示你打算或想要做某事〕
especially BrE spoken
I
must
call
her
tonight.
我今晚一定要打电话给她。
6
I must admit/say/confess
used
to
emphasize
what
you
are
saying
[口] 我得承认〔用于强调你说的话〕
spoken
I
must
say,
it
gave
me
quite
a
shock.
我得说,这让我非常震惊。
7
(why) must you…?
used
to
tell
someone
that
their
behaviour
upsets
or
annoys
you
[口] (为什么)你非要…?〔告诉某人他们的举止使你生气或困扰〕
spoken
Must
you
spoil
everything?
你非得把一切都弄糟吗?
Why
must
you
always
be
so
suspicious?
为什么你总是非要这样多疑?
8
a must-have/must-see/must-read etc
something
that
is
so
good,
exciting,
or
interesting
that
you
think
people
should
have
it,
see
it
etc
[非正式] 必有/必看/必读等的东西
informal
The
exhibit
is
a
must-see
for
anyone
interested
in
Japanese
art.
对于对日本艺术感兴趣的人来说,这件展品是必看的。
a
must-read
novel
必读的小说
9
if you must (do sth)
used
to
tell
someone
that
they
are
allowed
to
do
something,
but
that
you
do
not
approve
of
it
or
agree
with
it
[口] 如果你硬要(做某事)
spoken
All
right,
come
along,
if
you
must.
好吧,如果你非要一起去,那就去吧。
If
you
must
smoke,
please
go
outside.
如果你非要吸烟不可,请到外面去吸。
10
if you must know
10.
used
when
you
answer
a
question
that
you
think
someone
should
not
have
asked,
because
it
is
slightly
impolite
[口] 如果你非要知道〔用于回答你认为别人不该问的问题,因为提这个问题不太礼貌〕
spoken
Well,
if
you
must
know,
I’m
thirty-six.
好了,如果你非要知道,我三十六岁了。
mʌst
noun
11
something
that
you
must
do
or
must
have
必须做的事; 必不可少的东西
Warm
clothes
are
a
must
in
the
mountains.
御寒衣服在山里是必不可少的。