I am not able to dance. (say it in the past)
I wasn't able to dance.
We won't be able to go to school. (say it in the past)
We weren't able to go to school.
It was able to bark all day long. (say it in the present)
It is able to bark all day long.
I will be able to buy a nice cottage in the countryside. (say it in the past)
I was able to buy a nice cottage in the countryside.
Will you and Mary be able to catch the bus? (say it in the present)
Are you and Mary able to catch the bus?
They won't be able to go out. (say it in the present)
They aren't able to go out.
You will be able to do it! (say it in the past)
You were able to do it!
Mr. Smith won't be able to run fast. (say it in the present)
Mr. Smith isn't able to run fast.
They weren't able to travel abroad on their own. (say it in the future)
They won't be able to travel on their own.
She was able to swim faster. (say it in the future)
She will be able to swim faster.
I was able to hand in the essay on time. (say it in the future)
I will be able to hand in the essay on time.
They won't be able to help you. (say it in the present)
They aren't able to help you.