be able to和can用法上的区别

Question

如题所述

Answer 1

e
able
to
与can用法区别：
(1)
be
able
to
强调通过努力而获得的能力，而can则强调自身已具有的能力。如：
She
can
sing
the
song
in
English.
她能用英语唱这首歌。
He
will
be
able
to
sing
this
song
in
English
in
a
few
minutes,
too.
几小时之后，他也能用英语唱这首歌。
(2)
be
able
to
强调一种结果，而can只强调一种可能。如：
Luckily,
he
was
able
to
escape
from
the
big
fire
in
the
end.
幸运的是，他终于逃出了大火。
If
he
got
here
a
few
hours
earlier,
I
could
save
him.
要是他早几小时来，我还能救他。
(3)
be
able
to
可以有各种时态；而can只有一般现在和一般过去两种时态。如：
I
could
help
you
last
night,
but
you
didn’t
come.
昨天晚上我能帮你，而你又没来。
Can
you
see
it
there?
你能看见它在那儿吗？
He
is
/
was
/
will
be
able
to
help
you.
他能帮你的忙。
(4)
can可用于表示可能性，推测，允许等情况，而be
able
to通常不这样用。

Answer 2

be
able
to
与can用法区别
(1)
be
able
to
强调通过努力而获得的能力，而can则强调自身已具有的能力。如：
She
can
sing
the
song
in
English.
她能用英语唱这首歌。
He
will
be
able
to
sing
this
song
in
English
in
a
few
minutes,
too.
几小时之后，他也能用英语唱这首歌。
(2)
be
able
to
强调一种结果，而can只强调一种可能。如：
Luckily,
he
was
able
to
escape
from
the
big
fire
in
the
end.
幸运的是，他终于逃出了大火。
If
he
got
here
a
few
hours
earlier,
I
could
save
him.
要是他早几小时来，我还能救他。
(3)
be
able
to
可以有各种时态；而can只有一般现在和一般过去两种时态。如：
I
could
help
you
last
night,
but
you
didn’t
come.
昨天晚上我能帮你，而你又没来。
Can
you
see
it
there?
你能看见它在那儿吗？
He
is
/
was
/
will
be
able
to
help
you.
他能帮你的忙。
(4)
can可用于表示可能性，推测，允许等情况，而be
able
to通常不这样用。