I can pot you can pot he can pot we can pot you can pot they can pot
V-ing form
I can be potting you can be potting he can be potting we can be potting you can be potting they can be potting
Perfect
I can have potted you can have potted he can have potted we can have potted you can have potted they can have potted
V-ing perfect
I can have been potting you can have been potting he can have been potting we can have been potting you can have been potting they can have been potting
Negation
Simple form
I can't pot you can't pot he can't pot we can't pot you can't pot they can't pot
V-ing form
I can't be potting you can't be potting he can't be potting we can't be potting you can't be potting they can't be potting
Perfect
I can't have potted you can't have potted he can't have potted we can't have potted you can't have potted they can't have potted
V-ing perfect
I can't have been potting you can't have been potting he can't have been potting we can't have been potting you can't have been potting they can't have been potting
Interrogative form
Simple form
can I pot? can you pot? can he pot? can we pot? can you pot? can they pot?
V-ing form
can I be potting? can you be potting? can he be potting? can we be potting? can you be potting? can they be potting?
Perfect
can I have potted? can you have potted? can he have potted? can we have potted? can you have potted? can they have potted?
V-ing perfect
can I have been potting? can you have been potting? can he have been potting? can we have been potting? can you have been potting? can they have been potting?
Interro-negative form
Simple form
can't I pot? can't you pot? can't he pot? can't we pot? can't you pot? can't they pot?
V-ing form
can't I be potting? can't you be potting? can't he be potting? can't we be potting? can't you be potting? can't they be potting?
Perfect
can't I have potted? can't you have potted? can't he have potted? can't we have potted? can't you have potted? can't they have potted?
V-ing perfect
can't I have been potting? can't you have been potting? can't he have been potting? can't we have been potting? can't you have been potting? can't they have been potting?