Be able to (ability and possibility)

Simple present (subject+basic form): I am able to speak English.

Present continuous (am/is/are+verb+ing): I’m being able to speak English.

Present prefect (have/has+p.p): I have been able to speak English.

Present prefect continuous (have/has been+verb+ing): I have been being able to speak English.

Simple past (subject+past form): I was able to speak English.

Past continuous (was/were+verb+ing): U was being able to speak English.

Past prefect (had+p.p): I had been able to speak English.

Past prefect continuous (had been+verb+ing): I had been being able to speak English.

Future with will (will+basic form): I will be able to speak English.

Future with be going to (be going to+basic form): I’m going to be able to speak English.

Modals (modal verb+basic form): I should be able to speak English.

Infinitive (to+basic form): To be able to speak English.

Gerund (verb+ing): Being able to speak English.