4A can, could, be able to. Key

ex a 2 was able to / could / 3 be able to / 4 couldn't / wasn't able to / 5 not being able to / 6 be able to / 7 couldn't / wasn't able to / 8 be able to / 9 couldn't / wasn't able to / 10 's able to / can / 11 being able to / 12 couldn't / wouldn't be able to

ex b 2 couldn't / 3 be able to / 4 can / 5 been able to / 6 couldn't / 7 being able to / 8 can't / 9 Being able to / 10 be able to / 11 be able to / 12 can't