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 could not groom you could not groom he could not groom we could not groom you could not groom they could not groom
V-ing form
I could not be grooming you could not be grooming he could not be grooming we could not be grooming you could not be grooming they could not be grooming
Perfect
I could not have groomed you could not have groomed he could not have groomed we could not have groomed you could not have groomed they could not have groomed
V-ing perfect
I could not have been grooming you could not have been grooming he could not have been grooming we could not have been grooming you could not have been grooming they could not 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
could I not groom? could you not groom? could he not groom? could we not groom? could you not groom? could they not groom?
V-ing form
could I not be grooming? could you not be grooming? could he not be grooming? could we not be grooming? could you not be grooming? could they not be grooming?
Perfect
could I not have groomed? could you not have groomed? could he not have groomed? could we not have groomed? could you not have groomed? could they not have groomed?
V-ing perfect
could I not have been grooming? could you not have been grooming? could he not have been grooming? could we not have been grooming? could you not have been grooming? could they not have been grooming?