C a n , c o u l d
a n d
b e a b l e t o :
a b i l i t y
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When we say that someone or something has or doesn't have the ability to do something, we can
use
can('t)
(or
cannot)
(for the present) or
could(n't)
(for the past):
• He
can
analyse people's handwriting. • We
can't
afford to pay the bill.
• Anita
could
speak three languages before she was six.
We can use
be able to
instead of
can/could
to talk about an ability that someone has or had:
• Helen
can
/
is able to
read well, even though she's only three.
• He
could / was able to
draw on the support of over 20,000 troops.
In general, we use
be able to
when we talk about a specific achievement (particularly if it is
difficult, requiring some effort) rather than a general ability. Study this table:
present
past
general ability
We prefer
can
(but can also use
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