I can supervise you can supervise he can supervise we can supervise you can supervise they can supervise
V-ing form
I can be supervising you can be supervising he can be supervising we can be supervising you can be supervising they can be supervising
Perfect
I can have supervised you can have supervised he can have supervised we can have supervised you can have supervised they can have supervised
V-ing perfect
I can have been supervising you can have been supervising he can have been supervising we can have been supervising you can have been supervising they can have been supervising
Negation
Simple form
I cannot supervise you cannot supervise he cannot supervise we cannot supervise you cannot supervise they cannot supervise
V-ing form
I cannot be supervising you cannot be supervising he cannot be supervising we cannot be supervising you cannot be supervising they cannot be supervising
Perfect
I cannot have supervised you cannot have supervised he cannot have supervised we cannot have supervised you cannot have supervised they cannot have supervised
V-ing perfect
I cannot have been supervising you cannot have been supervising he cannot have been supervising we cannot have been supervising you cannot have been supervising they cannot have been supervising
Interrogative form
Simple form
can I supervise? can you supervise? can he supervise? can we supervise? can you supervise? can they supervise?
V-ing form
can I be supervising? can you be supervising? can he be supervising? can we be supervising? can you be supervising? can they be supervising?
Perfect
can I have supervised? can you have supervised? can he have supervised? can we have supervised? can you have supervised? can they have supervised?
V-ing perfect
can I have been supervising? can you have been supervising? can he have been supervising? can we have been supervising? can you have been supervising? can they have been supervising?
Interro-negative form
Simple form
can I not supervise? can you not supervise? can he not supervise? can we not supervise? can you not supervise? can they not supervise?
V-ing form
can I not be supervising? can you not be supervising? can he not be supervising? can we not be supervising? can you not be supervising? can they not be supervising?
Perfect
can I not have supervised? can you not have supervised? can he not have supervised? can we not have supervised? can you not have supervised? can they not have supervised?
V-ing perfect
can I not have been supervising? can you not have been supervising? can he not have been supervising? can we not have been supervising? can you not have been supervising? can they not have been supervising?