主要区别如下:
1.用于疑问句表示请求时,一般只用Could,且可用于各人称.如:
Could
you
help
me
explain
the
difference
between
"might"
and
"could"?
Could
I
use
your
mobile
phone
a
little
while?
上句可用May代替:May
I
use
your
mobile
phone
a
little
while?
用Might也是可以的,但不常见.
2.could和might都可用在条件句中,表示假想的情况.表示“本来会、本来可以/能够”.例如:
If
you
tried
you
could/might
do
the
work
better.如果你试试的话,准能把那项工作干得更好.
You
could
have
met
her
if
you
had
gone
that
way.如果你走那条路的话,你准能遇见她.
此句中的could如改成might则表示:……,你也许能见到他.
They
could/might
have
worked
it
out
if
they
had
asked
me
for
help.如果他们来向我求助的话,他们本能够做出来的.
He
could/might
have
give
the
answer,but
he
refused
to.他本来能够回答的,但他拒绝这么做.
You
were
stupid
to
go
skiing
there
—
you
could
have
broken
your
leg.你真笨,竟会到那地方滑雪.你本来会摔断腿的.
上面的例句中用might则因其语气较轻而语意效果不甚理想.
在此场合,could和might的区别是could较might的可能性强.
3.couldn't
be
+
比较级句型不能用might代替.如:
Their
lifestyles
couldn't
be
more
different.他们的生活方式极为不同.
4.could和might都可用在表示“结果”的状语从句中,同样,could语气较重些.例如:
He
expressed
his
ideas
clearly
so
that
the
average
person
might
understand.他把他的意思清楚地表达出来,以便一般人能听明白.
5.might
as
well表示“不妨、可以、倒不如”,此时的might是不能用could代替的.例如:
We
might
as
well
look
for
some
food
now.现在我们不妨找些吃的东西.
I
expect
I
might
as
well
be
going.我希望我可以走了.
We
might
as
well
have
gone
home
as
you
suggested.我们还不如按你建议的回家去呢.
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