English verb conjugation
CAN STAMMER

Regular verb: stammer - stammered - stammered

Affirmation

Simple form	V-ing form
I can stammer you can stammer he can stammer we can stammer you can stammer they can stammer	I can be stammering you can be stammering he can be stammering we can be stammering you can be stammering they can be stammering
Perfect	V-ing perfect
I can have stammered you can have stammered he can have stammered we can have stammered you can have stammered they can have stammered	I can have been stammering you can have been stammering he can have been stammering we can have been stammering you can have been stammering they can have been stammering

Negation

Simple form	V-ing form
I cannot stammer you cannot stammer he cannot stammer we cannot stammer you cannot stammer they cannot stammer	I cannot be stammering you cannot be stammering he cannot be stammering we cannot be stammering you cannot be stammering they cannot be stammering
Perfect	V-ing perfect
I cannot have stammered you cannot have stammered he cannot have stammered we cannot have stammered you cannot have stammered they cannot have stammered	I cannot have been stammering you cannot have been stammering he cannot have been stammering we cannot have been stammering you cannot have been stammering they cannot have been stammering

Interrogative form

Simple form	V-ing form
can I stammer? can you stammer? can he stammer? can we stammer? can you stammer? can they stammer?	can I be stammering? can you be stammering? can he be stammering? can we be stammering? can you be stammering? can they be stammering?
Perfect	V-ing perfect
can I have stammered? can you have stammered? can he have stammered? can we have stammered? can you have stammered? can they have stammered?	can I have been stammering? can you have been stammering? can he have been stammering? can we have been stammering? can you have been stammering? can they have been stammering?

Interro-negative form

Simple form	V-ing form
can I not stammer? can you not stammer? can he not stammer? can we not stammer? can you not stammer? can they not stammer?	can I not be stammering? can you not be stammering? can he not be stammering? can we not be stammering? can you not be stammering? can they not be stammering?
Perfect	V-ing perfect
can I not have stammered? can you not have stammered? can he not have stammered? can we not have stammered? can you not have stammered? can they not have stammered?	can I not have been stammering? can you not have been stammering? can he not have been stammering? can we not have been stammering? can you not have been stammering? can they not have been stammering?