English verb conjugation
COULD CANVASS

Regular verb: canvass - canvassed - canvassed

Affirmation

Simple form	V-ing form
I could canvass you could canvass she could canvass we could canvass you could canvass they could canvass	I could be canvassing you could be canvassing she could be canvassing we could be canvassing you could be canvassing they could be canvassing
Perfect	V-ing perfect
I could have canvassed you could have canvassed she could have canvassed we could have canvassed you could have canvassed they could have canvassed	I could have been canvassing you could have been canvassing she could have been canvassing we could have been canvassing you could have been canvassing they could have been canvassing

Negation

Simple form	V-ing form
I could not canvass you could not canvass she could not canvass we could not canvass you could not canvass they could not canvass	I could not be canvassing you could not be canvassing she could not be canvassing we could not be canvassing you could not be canvassing they could not be canvassing
Perfect	V-ing perfect
I could not have canvassed you could not have canvassed she could not have canvassed we could not have canvassed you could not have canvassed they could not have canvassed	I could not have been canvassing you could not have been canvassing she could not have been canvassing we could not have been canvassing you could not have been canvassing they could not have been canvassing

Interrogative form

Simple form	V-ing form
could I canvass? could you canvass? could she canvass? could we canvass? could you canvass? could they canvass?	could I be canvassing? could you be canvassing? could she be canvassing? could we be canvassing? could you be canvassing? could they be canvassing?
Perfect	V-ing perfect
could I have canvassed? could you have canvassed? could she have canvassed? could we have canvassed? could you have canvassed? could they have canvassed?	could I have been canvassing? could you have been canvassing? could she have been canvassing? could we have been canvassing? could you have been canvassing? could they have been canvassing?

Interro-negative form

Simple form	V-ing form
could I not canvass? could you not canvass? could she not canvass? could we not canvass? could you not canvass? could they not canvass?	could I not be canvassing? could you not be canvassing? could she not be canvassing? could we not be canvassing? could you not be canvassing? could they not be canvassing?
Perfect	V-ing perfect
could I not have canvassed? could you not have canvassed? could she not have canvassed? could we not have canvassed? could you not have canvassed? could they not have canvassed?	could I not have been canvassing? could you not have been canvassing? could she not have been canvassing? could we not have been canvassing? could you not have been canvassing? could they not have been canvassing?