第1个回答 2020-03-03
may
not
语气较弱,”可以不”,You
may
not
finish
your
homework;
can't
”不能”;
You
can't
be
too
serious;问句回答时:Can
I
go
out
to
play?
No,
you
can't.
或做may问句的回答:May
I
sit
here?
No,
you
can't.;
couldn't
语气较委婉,”不能”,常做could疑问句的回答:Could
I
sit
here?
I'm
afraide
you
couldn't;
needn't
表示不必这么做:常做must问句的回答:Must
I
finish
my
homework
today?
No,
you
needn't.
mustn't
语气强,”禁止”:You
mustn't
step
on
the
grass.
第2个回答 2019-12-24
may
not
语气较弱,”可以不”,You
may
not
finish
your
homework;
can't
”不能”;
You
can't
be
too
serious;问句回答时:Can
I
go
out
to
play?
No,
you
can't.
或做may问句的回答:May
I
sit
here?
No,
you
can't.;
couldn't
语气较委婉,”不能”,常做could疑问句的回答:Could
I
sit
here?
I'm
afraide
you
couldn't;
needn't
表示不必这么做:常做must问句的回答:Must
I
finish
my
homework
today?
No,
you
needn't.
mustn't
语气强,”禁止”:You
mustn't
step
on
the
grass.