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can と be able to の使い分け
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I _____ (can) play the guitar since I was ten.
can
have been able to
was able to
am able to
He _____ (be) able to solve the problem yesterday.
can be
is able to
was able to
could
They _____ (be) able to finish the project by next week.
can
will be able to
were able to
have been able to
You _____ (be) able to drive after you get a license.
will be able to
are able to
can be
being able to
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