I could grope you could grope he could grope we could grope you could grope they could grope
V-ing form
I could be groping you could be groping he could be groping we could be groping you could be groping they could be groping
Perfect
I could have groped you could have groped he could have groped we could have groped you could have groped they could have groped
V-ing perfect
I could have been groping you could have been groping he could have been groping we could have been groping you could have been groping they could have been groping
Negation
Simple form
I could not grope you could not grope he could not grope we could not grope you could not grope they could not grope
V-ing form
I could not be groping you could not be groping he could not be groping we could not be groping you could not be groping they could not be groping
Perfect
I could not have groped you could not have groped he could not have groped we could not have groped you could not have groped they could not have groped
V-ing perfect
I could not have been groping you could not have been groping he could not have been groping we could not have been groping you could not have been groping they could not have been groping
Interrogative form
Simple form
could I grope? could you grope? could he grope? could we grope? could you grope? could they grope?
V-ing form
could I be groping? could you be groping? could he be groping? could we be groping? could you be groping? could they be groping?
Perfect
could I have groped? could you have groped? could he have groped? could we have groped? could you have groped? could they have groped?
V-ing perfect
could I have been groping? could you have been groping? could he have been groping? could we have been groping? could you have been groping? could they have been groping?
Interro-negative form
Simple form
could I not grope? could you not grope? could he not grope? could we not grope? could you not grope? could they not grope?
V-ing form
could I not be groping? could you not be groping? could he not be groping? could we not be groping? could you not be groping? could they not be groping?
Perfect
could I not have groped? could you not have groped? could he not have groped? could we not have groped? could you not have groped? could they not have groped?
V-ing perfect
could I not have been groping? could you not have been groping? could he not have been groping? could we not have been groping? could you not have been groping? could they not have been groping?