I could salt you could salt she could salt we could salt you could salt they could salt
V-ing form
I could be salting you could be salting she could be salting we could be salting you could be salting they could be salting
Perfect
I could have salted you could have salted she could have salted we could have salted you could have salted they could have salted
V-ing perfect
I could have been salting you could have been salting she could have been salting we could have been salting you could have been salting they could have been salting
Negation
Simple form
I couldn't salt you couldn't salt she couldn't salt we couldn't salt you couldn't salt they couldn't salt
V-ing form
I couldn't be salting you couldn't be salting she couldn't be salting we couldn't be salting you couldn't be salting they couldn't be salting
Perfect
I couldn't have salted you couldn't have salted she couldn't have salted we couldn't have salted you couldn't have salted they couldn't have salted
V-ing perfect
I couldn't have been salting you couldn't have been salting she couldn't have been salting we couldn't have been salting you couldn't have been salting they couldn't have been salting
Interrogative form
Simple form
could I salt? could you salt? could she salt? could we salt? could you salt? could they salt?
V-ing form
could I be salting? could you be salting? could she be salting? could we be salting? could you be salting? could they be salting?
Perfect
could I have salted? could you have salted? could she have salted? could we have salted? could you have salted? could they have salted?
V-ing perfect
could I have been salting? could you have been salting? could she have been salting? could we have been salting? could you have been salting? could they have been salting?
Interro-negative form
Simple form
couldn't I salt? couldn't you salt? couldn't she salt? couldn't we salt? couldn't you salt? couldn't they salt?
V-ing form
couldn't I be salting? couldn't you be salting? couldn't she be salting? couldn't we be salting? couldn't you be salting? couldn't they be salting?
Perfect
couldn't I have salted? couldn't you have salted? couldn't she have salted? couldn't we have salted? couldn't you have salted? couldn't they have salted?
V-ing perfect
couldn't I have been salting? couldn't you have been salting? couldn't she have been salting? couldn't we have been salting? couldn't you have been salting? couldn't they have been salting?