English verb conjugation
COULD PLY

Regular verb: ply - plied - plied

Affirmation

Simple form	V-ing form
I could ply you could ply he could ply we could ply you could ply they could ply	I could be plying you could be plying he could be plying we could be plying you could be plying they could be plying
Perfect	V-ing perfect
I could have plied you could have plied he could have plied we could have plied you could have plied they could have plied	I could have been plying you could have been plying he could have been plying we could have been plying you could have been plying they could have been plying

Negation

Simple form	V-ing form
I couldn't ply you couldn't ply he couldn't ply we couldn't ply you couldn't ply they couldn't ply	I couldn't be plying you couldn't be plying he couldn't be plying we couldn't be plying you couldn't be plying they couldn't be plying
Perfect	V-ing perfect
I couldn't have plied you couldn't have plied he couldn't have plied we couldn't have plied you couldn't have plied they couldn't have plied	I couldn't have been plying you couldn't have been plying he couldn't have been plying we couldn't have been plying you couldn't have been plying they couldn't have been plying

Interrogative form

Simple form	V-ing form
could I ply? could you ply? could he ply? could we ply? could you ply? could they ply?	could I be plying? could you be plying? could he be plying? could we be plying? could you be plying? could they be plying?
Perfect	V-ing perfect
could I have plied? could you have plied? could he have plied? could we have plied? could you have plied? could they have plied?	could I have been plying? could you have been plying? could he have been plying? could we have been plying? could you have been plying? could they have been plying?

Interro-negative form

Simple form	V-ing form
couldn't I ply? couldn't you ply? couldn't he ply? couldn't we ply? couldn't you ply? couldn't they ply?	couldn't I be plying? couldn't you be plying? couldn't he be plying? couldn't we be plying? couldn't you be plying? couldn't they be plying?
Perfect	V-ing perfect
couldn't I have plied? couldn't you have plied? couldn't he have plied? couldn't we have plied? couldn't you have plied? couldn't they have plied?	couldn't I have been plying? couldn't you have been plying? couldn't he have been plying? couldn't we have been plying? couldn't you have been plying? couldn't they have been plying?