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 can't canvass you can't canvass she can't canvass we can't canvass you can't canvass they can't canvass
V-ing form
I can't be canvassing you can't be canvassing she can't be canvassing we can't be canvassing you can't be canvassing they can't be canvassing
Perfect
I can't have canvassed you can't have canvassed she can't have canvassed we can't have canvassed you can't have canvassed they can't have canvassed
V-ing perfect
I can't have been canvassing you can't have been canvassing she can't have been canvassing we can't have been canvassing you can't have been canvassing they can't 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't I canvass? can't you canvass? can't she canvass? can't we canvass? can't you canvass? can't they canvass?
V-ing form
can't I be canvassing? can't you be canvassing? can't she be canvassing? can't we be canvassing? can't you be canvassing? can't they be canvassing?
Perfect
can't I have canvassed? can't you have canvassed? can't she have canvassed? can't we have canvassed? can't you have canvassed? can't they have canvassed?
V-ing perfect
can't I have been canvassing? can't you have been canvassing? can't she have been canvassing? can't we have been canvassing? can't you have been canvassing? can't they have been canvassing?