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