They won't be able to help you. (say it in present).
They are not able to help you.
It was able to barlk all day long. (say it in present).
It is able to bark all day long.
Mr. Smith will not be able to run fast. (say it in present).
Mr. Smith isn't able to run fast.
I was able to do the homework on time. (say it in future).
I will be able to do the homework on time.
She was able to swim faster. (say it in future).
She will be able to swim faster.
We won't be able to go to school. (say it in past).
We weren't able to go to school.
I am not able to dance. (say it in past).
I was not able to dance.
The won't be able to go out. (say it in present).
They aren't able to go out.
You will be able to do it! (say it in past).
You were able to do it!
Will you and Mary be able to catch the bus? (say it in present).
Are you and Mary able to catch the bus?