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