Anonymous When I must use "be able to? There is no time that you must use it. However, it would be wise to use it instead of 'can' for a past ability: When I was young, I was able to tapdance well.
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AnonymousWhen I must use "be able to?There is no time that you must use it. However, it would be wise to use it instead of 'can' for a past ability: When I was young, I was able to tapdance well.