I can canvass you can canvass she can canvass we can canvass you can canvass they can canvass
V-ing form
I can be canvassing you can be canvassing she can be canvassing we can be canvassing you can be canvassing they can be canvassing
Perfect
I can have canvassed you can have canvassed she can have canvassed we can have canvassed you can have canvassed they can have canvassed
V-ing perfect
I can have been canvassing you can have been canvassing she can have been canvassing we can have been canvassing you can have been canvassing they can have been canvassing
Negation
Simple form
I cannot canvass you cannot canvass she cannot canvass we cannot canvass you cannot canvass they cannot canvass
V-ing form
I cannot be canvassing you cannot be canvassing she cannot be canvassing we cannot be canvassing you cannot be canvassing they cannot be canvassing
Perfect
I cannot have canvassed you cannot have canvassed she cannot have canvassed we cannot have canvassed you cannot have canvassed they cannot have canvassed
V-ing perfect
I cannot have been canvassing you cannot have been canvassing she cannot have been canvassing we cannot have been canvassing you cannot have been canvassing they cannot have been canvassing
Interrogative form
Simple form
can I canvass? can you canvass? can she canvass? can we canvass? can you canvass? can they canvass?
V-ing form
can I be canvassing? can you be canvassing? can she be canvassing? can we be canvassing? can you be canvassing? can they be canvassing?
Perfect
can I have canvassed? can you have canvassed? can she have canvassed? can we have canvassed? can you have canvassed? can they have canvassed?
V-ing perfect
can I have been canvassing? can you have been canvassing? can she have been canvassing? can we have been canvassing? can you have been canvassing? can they have been canvassing?
Interro-negative form
Simple form
can I not canvass? can you not canvass? can she not canvass? can we not canvass? can you not canvass? can they not canvass?
V-ing form
can I not be canvassing? can you not be canvassing? can she not be canvassing? can we not be canvassing? can you not be canvassing? can they not be canvassing?
Perfect
can I not have canvassed? can you not have canvassed? can she not have canvassed? can we not have canvassed? can you not have canvassed? can they not have canvassed?
V-ing perfect
can I not have been canvassing? can you not have been canvassing? can she not have been canvassing? can we not have been canvassing? can you not have been canvassing? can they not have been canvassing?