can/could/be able to

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Criss

New member
Joined
Oct 28, 2004
Please, can you help me with this?

What would you say is the main difference between:

I could finish my project in time
I was able to finish my project in time

I can sing
I am able to sing

Is there any big difference, and if so, what exactly tells the difference between them? Is it the context?

Thank you so much,
Criss
 

Mister Micawber

Key Member
Joined
Sep 26, 2004
Member Type
English Teacher
Native Language
English
Home Country
United States
Current Location
Japan
No real difference, Criss. 'Was/were able to' is I think more common in the past tense than 'could'. 'Be able to', of course, can be used in tenses that 'can' and 'could' are unable to be used.
 
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