artemski150899
A) could be able to couldn't not being able to be able to
couldn't be able to couldn't can being able to wouldn't be able to
b) 2) couldn't remember 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
Answers & Comments
could
be able to
couldn't
not being able to
be able to
couldn't
be able to
couldn't
can
being able to
wouldn't be able to
b)
2) couldn't remember
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