Unit 8 It must belong to Carla .语法精析精练+答案（暑假预习通用）

中小学教育资源及组卷应用平台
九全一册Unit
8语法精析精练
语法精析
情态动词的用法归纳
情态动词有can(
could)),may(
might)),must,
shall((
should)),will(would),dare(dared),
need(
needed),
ought
to等。大部分情态动词无人称和数的变化,不能单独使用,必须与其后的动词原形一起构成谓语。
一、can,
could
1.表示能力(体力、知识、技能)。
Can
you
lift
this
heavy
box??(体力)
Mary
can
speak
three
languages..(知识)
Can
you
skate??(技能)
此时可用
be
able
to代替。can只有一般现在时和一般过去式;而
be
able
to!则有更多的时态变化。
I'll
not
be
able
to
come
this
afternoon.
当表示“经过努力才能做成功某事”时应用
be
able
to,,不能用can。如:
He
was
able
to
go
to
the
party
yesterday
evening
in
spite
of
the
heavy
rain.
2.表示请求和允许。
—Can
I
go
now?
—Yes,
you
can.
,
you
can't.
此时可与may互换。在疑问句中还可用
could,,
might
1代替,不是过去式,只是语气更委婉,不能用于肯定句和答语中
—Could
I
come
to
see
you
tomorrow?
—Yes,
you
can,
(No,
I'm
afraid
not.
3.表示客观可能性(客观原因形成的能力)。
They've
changed
the
timetable,
so
we
can
go
by
bus
instead.
This
hall
can
hold
500
people
at
least.
4.表示推测(惊讶、怀疑、不相信的态度),用于疑问句、否定句和感叹句中。
Can
this
be
true?
This
can't
be
done
by
him.
How
can
this
be
true?
二、may,
might
1.表示请求和充许。
might比may语气更委婉,而不是过式。否定回答时可用cant或
mustn't,,表示“不可以禁止”
—Might/May
I
smoke
in
this
room?
—No,
you
mustn't.
—May/Might
I
take
this
book
out
of
the
room?
—No,
you
can't/mustn't.
用“May.?”征询对方许可时比较正式和客气,而用“Can
I...?”在口语中更常见。
2.用于祈使句,表示祝愿。
May
you
succeed!
3.表示推测、可能性(不用于疑问句)
might不是过去式,它所表示的可能性比may小。
He
may/might
be
very
busy
now.
Your
mother
may/might
not
know
the
truth.
三、must,
have
to
1.表示必须;必要。
You
must
come
in
time.
在回答must引出的问句时,如果是否定的,不能用
mustn''t(禁止;不准),而用
needn't,don't
have
to((不必)。
—Must
we
hand
in
our
exercise
books
today?
—Yes,
you
must.
,
you
don't
have
to/you
needn't.
2.must是表达说话人的主观看法,而
have
to
J则强调客观需要。must只有一般现在时,
have
to有更多的时态形式。
The
play
isn't
interesting.
I
really
must
go
now.
I
had
to
work
when
I
was
at
your
age.
3.表示推测、可能性(只用于肯定的陈述句)。
You're
Tom's
good
friend,
so
you
must
know
what
he
likes
best.
Your
mother
must
be
waiting
for
you
now.
四、must
be//
may
be//
might
be//
could
be//can't
be的用法
must
be
i语气强硬,“必须;一定”之意
may
be//
might
be//
could
be
i语气不确定,“可能”之意
can't
be语气偏强硬,“不可能”之意
语法精练
(
)1.—Must
we
do
it
now
—No,
you
_________
A.won't
B.needn't
C.can't
D.don't
(
)2.He
at
home,
I'm
not
sure.
A.may
B.
can't
be
C.
may
be
D.
must
be
(
)3.You
to
the
meeting
this
afternoon
if
you
have
something
important
to
do.
A.
needn't
to
come
B.
don't
need
come
C.
don't
need
coming
D.
needn't
come
(
)4.—May
I
pick
a
flower
in
the
garden?
—
。
A.
No,
you
needn't
B.Not,please
C.
No,
you
mustn't
D.
No,
you
won't
(
)5.
You'd
better
late
again.
A.don't
B.
not
be
C.
not
being
D.
won't
be
(
)6.—Can
I
leave
this
door
open
at
night?
—You
better
not.
A.should
B.
would
C.
could
D.
had
(
)7.
Put
on
more
clothes.
You
be
feeling
cold
with
only
a
shirt
on.
A.can
B.could
C
would
D.
must
(
)8.
I
thought
you
like
something
to
read,
so
I
have
brought
you
some
books.
A.may
B.might
C.
could
D.
must
(
)9.—I
saw
Linda
in
the
supermarket.
—It
her,
because
she
has
gone
to
Shenzhen.
A.
should
be
B.
may
be
C.
must
be
D.
can't
be
(
)10.
The
plant
is
dead.
I
it
more
water.
A.
will
gave
B.
would
have
given
C.
must
give
D.
should
have
given
(
)11.
It's
freezing
outside.
You
put
on
your
overcoat.
A.
had
better
to
B.
had
better
C.
would
better
D.
would
better
to
(
)12.You
return
the
book
now.
You
can
keep
it
till
next
week
if
you
like.
A.
can't
B.
mustn't
C.
needn't
D.
may
not
(
)13.
Where
is
my
pen?
I
it.
A.
might
lose
B.
would
have
lost
C.
should
have
lost
D.
must
have
lost
(
)14.
I
didn't
hear
the
phone.
I
asleep.
A.
must
be
B.
must
have
been
C.
should
be
D.
should
have
been
(
)15.He
you
more
help,
even
though
he
was
very
busy.
A.
might
have
given
B
might
given
C.
may
have
given
D.
may
give
(
)16.
A
computer
think
for
itself;
it
must
be
told
what
to
do.
A.
can't
B
couldn't
C.
may
not
D.
might
not
(
)17.--Could
I
borrow
your
dictionary?
--Yes,
of
course
you
.
A.
might
B.
will
C.can
D.
should
(
)18.Which
you
do,
go
to
the
cinema
or
stay
at
home?
A.
do;rather
B.
Would;rather
C.
will;
rather
D.
should;rather
(
)19.—Shall
I
tell
John
about
it?
—No,
you
.
I've
told
him
already.
A.
needn't
B.wouldn't
C.mustn't
D.shouldn't
(
)20.Peter
come
with
us
tonight,
but
he
isn't
very
sure
yet.
A.must
B.may
C.can
D.will
答案
语法精练
1—5
BCDCB
6—10
DDBDD
11—15
BCDBA
16—20
ACBAB
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