Present simple:

I am able to speak three languages. (I have the ability to speak three languages.)

Present continuous:

She is not able to come to the party. (She doesn’t have the possibility to come to the party.)

Present perfect:

They have been able to finish the project on time. (They have managed to finish the project on time.)

Past simple:

He was able to solve the problem. (He had the ability or the opportunity to solve the problem.)

Past continuous:

We were not able to sleep because of the noise. (We didn’t have the possibility to sleep because of the noise.)

Past perfect:

She had been able to travel around the world before she got married. (She had had the opportunity to travel around the world before she got married.)

Future simple:

You will be able to see the results tomorrow. (You will have the possibility to see the results tomorrow.)

Future continuous:

I will be able to help you next week. (I will have the time or the opportunity to help you next week.)

Future perfect:

He will have been able to finish his homework by then. (He will have completed his homework by then.)

Modal verbs:

She might be able to lend you some money. (She might have the ability or the willingness to lend you some money.)