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 cannot stopper you cannot stopper he cannot stopper we cannot stopper you cannot stopper they cannot stopper	I cannot be stoppering you cannot be stoppering he cannot be stoppering we cannot be stoppering you cannot be stoppering they cannot be stoppering
Perfect	V-ing perfect
I cannot have stoppered you cannot have stoppered he cannot have stoppered we cannot have stoppered you cannot have stoppered they cannot have stoppered	I cannot have been stoppering you cannot have been stoppering he cannot have been stoppering we cannot have been stoppering you cannot have been stoppering they cannot 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 I not stopper? can you not stopper? can he not stopper? can we not stopper? can you not stopper? can they not stopper?	can I not be stoppering? can you not be stoppering? can he not be stoppering? can we not be stoppering? can you not be stoppering? can they not be stoppering?
Perfect	V-ing perfect
can I not have stoppered? can you not have stoppered? can he not have stoppered? can we not have stoppered? can you not have stoppered? can they not have stoppered?	can I not have been stoppering? can you not have been stoppering? can he not have been stoppering? can we not have been stoppering? can you not have been stoppering? can they not have been stoppering?