I could deal you could deal he could deal we could deal you could deal they could deal
V-ing form
I could be dealing you could be dealing he could be dealing we could be dealing you could be dealing they could be dealing
Perfect
I could have dealt you could have dealt he could have dealt we could have dealt you could have dealt they could have dealt
V-ing perfect
I could have been dealing you could have been dealing he could have been dealing we could have been dealing you could have been dealing they could have been dealing
Negation
Simple form
I couldn't deal you couldn't deal he couldn't deal we couldn't deal you couldn't deal they couldn't deal
V-ing form
I couldn't be dealing you couldn't be dealing he couldn't be dealing we couldn't be dealing you couldn't be dealing they couldn't be dealing
Perfect
I couldn't have dealt you couldn't have dealt he couldn't have dealt we couldn't have dealt you couldn't have dealt they couldn't have dealt
V-ing perfect
I couldn't have been dealing you couldn't have been dealing he couldn't have been dealing we couldn't have been dealing you couldn't have been dealing they couldn't have been dealing
Interrogative form
Simple form
could I deal? could you deal? could he deal? could we deal? could you deal? could they deal?
V-ing form
could I be dealing? could you be dealing? could he be dealing? could we be dealing? could you be dealing? could they be dealing?
Perfect
could I have dealt? could you have dealt? could he have dealt? could we have dealt? could you have dealt? could they have dealt?
V-ing perfect
could I have been dealing? could you have been dealing? could he have been dealing? could we have been dealing? could you have been dealing? could they have been dealing?
Interro-negative form
Simple form
couldn't I deal? couldn't you deal? couldn't he deal? couldn't we deal? couldn't you deal? couldn't they deal?
V-ing form
couldn't I be dealing? couldn't you be dealing? couldn't he be dealing? couldn't we be dealing? couldn't you be dealing? couldn't they be dealing?
Perfect
couldn't I have dealt? couldn't you have dealt? couldn't he have dealt? couldn't we have dealt? couldn't you have dealt? couldn't they have dealt?
V-ing perfect
couldn't I have been dealing? couldn't you have been dealing? couldn't he have been dealing? couldn't we have been dealing? couldn't you have been dealing? couldn't they have been dealing?