English verb conjugation
COULD SUBDIVIDE

Regular verb: subdivide - subdivided - subdivided

Affirmation

Simple form	V-ing form
I could subdivide you could subdivide she could subdivide we could subdivide you could subdivide they could subdivide	I could be subdividing you could be subdividing she could be subdividing we could be subdividing you could be subdividing they could be subdividing
Perfect	V-ing perfect
I could have subdivided you could have subdivided she could have subdivided we could have subdivided you could have subdivided they could have subdivided	I could have been subdividing you could have been subdividing she could have been subdividing we could have been subdividing you could have been subdividing they could have been subdividing

Negation

Simple form	V-ing form
I couldn't subdivide you couldn't subdivide she couldn't subdivide we couldn't subdivide you couldn't subdivide they couldn't subdivide	I couldn't be subdividing you couldn't be subdividing she couldn't be subdividing we couldn't be subdividing you couldn't be subdividing they couldn't be subdividing
Perfect	V-ing perfect
I couldn't have subdivided you couldn't have subdivided she couldn't have subdivided we couldn't have subdivided you couldn't have subdivided they couldn't have subdivided	I couldn't have been subdividing you couldn't have been subdividing she couldn't have been subdividing we couldn't have been subdividing you couldn't have been subdividing they couldn't have been subdividing

Interrogative form

Simple form	V-ing form
could I subdivide? could you subdivide? could she subdivide? could we subdivide? could you subdivide? could they subdivide?	could I be subdividing? could you be subdividing? could she be subdividing? could we be subdividing? could you be subdividing? could they be subdividing?
Perfect	V-ing perfect
could I have subdivided? could you have subdivided? could she have subdivided? could we have subdivided? could you have subdivided? could they have subdivided?	could I have been subdividing? could you have been subdividing? could she have been subdividing? could we have been subdividing? could you have been subdividing? could they have been subdividing?

Interro-negative form

Simple form	V-ing form
couldn't I subdivide? couldn't you subdivide? couldn't she subdivide? couldn't we subdivide? couldn't you subdivide? couldn't they subdivide?	couldn't I be subdividing? couldn't you be subdividing? couldn't she be subdividing? couldn't we be subdividing? couldn't you be subdividing? couldn't they be subdividing?
Perfect	V-ing perfect
couldn't I have subdivided? couldn't you have subdivided? couldn't she have subdivided? couldn't we have subdivided? couldn't you have subdivided? couldn't they have subdivided?	couldn't I have been subdividing? couldn't you have been subdividing? couldn't she have been subdividing? couldn't we have been subdividing? couldn't you have been subdividing? couldn't they have been subdividing?