CAN, COULD, BE ABLE TO WORKSHEET, answer key

4A
a  2 both possible,   3 be able to  4 both possible   5 not being able to   6 be able to   7 both possible   8 be able to   9 both possible   10 both possible   11 being able to   12 both possible

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