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