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 can't grope you can't grope he can't grope we can't grope you can't grope they can't grope
V-ing form
I can't be groping you can't be groping he can't be groping we can't be groping you can't be groping they can't be groping
Perfect
I can't have groped you can't have groped he can't have groped we can't have groped you can't have groped they can't have groped
V-ing perfect
I can't have been groping you can't have been groping he can't have been groping we can't have been groping you can't have been groping they can't 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't I grope? can't you grope? can't he grope? can't we grope? can't you grope? can't they grope?
V-ing form
can't I be groping? can't you be groping? can't he be groping? can't we be groping? can't you be groping? can't they be groping?
Perfect
can't I have groped? can't you have groped? can't he have groped? can't we have groped? can't you have groped? can't they have groped?
V-ing perfect
can't I have been groping? can't you have been groping? can't he have been groping? can't we have been groping? can't you have been groping? can't they have been groping?