1) can
2) couldn't
3) are not able to
4) could
5) mustn't
6) was able to
7) could.
8) had to
9) mustn't
10) was able too
1) can
2) couldn't
3) are not able to
4) could
5) mustn't
6) was able to
7) could.
8) had to
9) mustn't
10) was able too