can stammer
Verbo regular: stammer - stammered- stammered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't stammer
you can't stammer
he can't stammer
we can't stammer
you can't stammer
they can't stammer 	I can't be stammering
you can't be stammering
he can't be stammering
we can't be stammering
you can't be stammering
they can't be stammering	I can't have stammered
you can't have stammered
he can't have stammered
we can't have stammered
you can't have stammered
they can't have stammered	I can't have been stammering
you can't have been stammering
he can't have been stammering
we can't have been stammering
you can't have been stammering
they can't have been stammering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I stammer?
can't you stammer?
can't he stammer?
can't we stammer?
can't you stammer?
can't they stammer? 	can't I be stammering?
can't you be stammering?
can't he be stammering?
can't we be stammering?
can't you be stammering?
can't they be stammering? 	can't I have stammered?
can't you have stammered?
can't he have stammered?
can't we have stammered?
can't you have stammered?
can't they have stammered? 	can't I have been stammering?
can't you have been stammering?
can't he have been stammering?
can't we have been stammering?
can't you have been stammering?
can't they have been stammering?