can/could/be able to
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,
Re: can/could/be able to
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.