English verb conjugation
CAN STOPPER

Regular verb: stopper - stoppered - stoppered

Affirmation

Simple form	V-ing form
I can stopper you can stopper he can stopper we can stopper you can stopper they can stopper	I can be stoppering you can be stoppering he can be stoppering we can be stoppering you can be stoppering they can be stoppering
Perfect	V-ing perfect
I can have stoppered you can have stoppered he can have stoppered we can have stoppered you can have stoppered they can have stoppered	I can have been stoppering you can have been stoppering he can have been stoppering we can have been stoppering you can have been stoppering they can have been stoppering

Negation

Simple form	V-ing form
I can't stopper you can't stopper he can't stopper we can't stopper you can't stopper they can't stopper	I can't be stoppering you can't be stoppering he can't be stoppering we can't be stoppering you can't be stoppering they can't be stoppering
Perfect	V-ing perfect
I can't have stoppered you can't have stoppered he can't have stoppered we can't have stoppered you can't have stoppered they can't have stoppered	I can't have been stoppering you can't have been stoppering he can't have been stoppering we can't have been stoppering you can't have been stoppering they can't have been stoppering

Interrogative form

Simple form	V-ing form
can I stopper? can you stopper? can he stopper? can we stopper? can you stopper? can they stopper?	can I be stoppering? can you be stoppering? can he be stoppering? can we be stoppering? can you be stoppering? can they be stoppering?
Perfect	V-ing perfect
can I have stoppered? can you have stoppered? can he have stoppered? can we have stoppered? can you have stoppered? can they have stoppered?	can I have been stoppering? can you have been stoppering? can he have been stoppering? can we have been stoppering? can you have been stoppering? can they have been stoppering?

Interro-negative form

Simple form	V-ing form
can't I stopper? can't you stopper? can't he stopper? can't we stopper? can't you stopper? can't they stopper?	can't I be stoppering? can't you be stoppering? can't he be stoppering? can't we be stoppering? can't you be stoppering? can't they be stoppering?
Perfect	V-ing perfect
can't I have stoppered? can't you have stoppered? can't he have stoppered? can't we have stoppered? can't you have stoppered? can't they have stoppered?	can't I have been stoppering? can't you have been stoppering? can't he have been stoppering? can't we have been stoppering? can't you have been stoppering? can't they have been stoppering?