Re: diffrence between "can" and "able to" Can is a verb; its past tense is could. Able is not a verb. It must be used with an auxilliary verb and an infinitive verb.
I am able to go.
I was able to go.
We are able to go.
We were able to go.
You are able to go.
You were able to go.
I have been able to go.
He has been able to go. |