I can ply you can ply he can ply we can ply you can ply they can ply
V-ing form
I can be plying you can be plying he can be plying we can be plying you can be plying they can be plying
Perfect
I can have plied you can have plied he can have plied we can have plied you can have plied they can have plied
V-ing perfect
I can have been plying you can have been plying he can have been plying we can have been plying you can have been plying they can have been plying
Negation
Simple form
I cannot ply you cannot ply he cannot ply we cannot ply you cannot ply they cannot ply
V-ing form
I cannot be plying you cannot be plying he cannot be plying we cannot be plying you cannot be plying they cannot be plying
Perfect
I cannot have plied you cannot have plied he cannot have plied we cannot have plied you cannot have plied they cannot have plied
V-ing perfect
I cannot have been plying you cannot have been plying he cannot have been plying we cannot have been plying you cannot have been plying they cannot have been plying
Interrogative form
Simple form
can I ply? can you ply? can he ply? can we ply? can you ply? can they ply?
V-ing form
can I be plying? can you be plying? can he be plying? can we be plying? can you be plying? can they be plying?
Perfect
can I have plied? can you have plied? can he have plied? can we have plied? can you have plied? can they have plied?
V-ing perfect
can I have been plying? can you have been plying? can he have been plying? can we have been plying? can you have been plying? can they have been plying?
Interro-negative form
Simple form
can I not ply? can you not ply? can he not ply? can we not ply? can you not ply? can they not ply?
V-ing form
can I not be plying? can you not be plying? can he not be plying? can we not be plying? can you not be plying? can they not be plying?
Perfect
can I not have plied? can you not have plied? can he not have plied? can we not have plied? can you not have plied? can they not have plied?
V-ing perfect
can I not have been plying? can you not have been plying? can he not have been plying? can we not have been plying? can you not have been plying? can they not have been plying?