could stutter
Verbo regular: stutter - stuttered- stuttered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could stutter
you could stutter
he could stutter
we could stutter
you could stutter
they could stutter 	I could be stuttering
you could be stuttering
he could be stuttering
we could be stuttering
you could be stuttering
they could be stuttering	I could have stuttered
you could have stuttered
he could have stuttered
we could have stuttered
you could have stuttered
they could have stuttered	I could have been stuttering
you could have been stuttering
he could have been stuttering
we could have been stuttering
you could have been stuttering
they could have been stuttering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't stutter
you couldn't stutter
he couldn't stutter
we couldn't stutter
you couldn't stutter
they couldn't stutter 	I couldn't be stuttering
you couldn't be stuttering
he couldn't be stuttering
we couldn't be stuttering
you couldn't be stuttering
they couldn't be stuttering	I couldn't have stuttered
you couldn't have stuttered
he couldn't have stuttered
we couldn't have stuttered
you couldn't have stuttered
they couldn't have stuttered	I couldn't have been stuttering
you couldn't have been stuttering
he couldn't have been stuttering
we couldn't have been stuttering
you couldn't have been stuttering
they couldn't have been stuttering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I stutter?
could you stutter?
could he stutter?
could we stutter?
could you stutter?
could they stutter? 	could I be stuttering?
could you be stuttering?
could he be stuttering?
could we be stuttering?
could you be stuttering?
could they be stuttering? 	could I have stuttered?
could you have stuttered?
could he have stuttered?
could we have stuttered?
could you have stuttered?
could they have stuttered? 	could I have been stuttering?
could you have been stuttering?
could he have been stuttering?
could we have been stuttering?
could you have been stuttering?
could they have been stuttering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I stutter?
couldn't you stutter?
couldn't he stutter?
couldn't we stutter?
couldn't you stutter?
couldn't they stutter? 	couldn't I be stuttering?
couldn't you be stuttering?
couldn't he be stuttering?
couldn't we be stuttering?
couldn't you be stuttering?
couldn't they be stuttering? 	couldn't I have stuttered?
couldn't you have stuttered?
couldn't he have stuttered?
couldn't we have stuttered?
couldn't you have stuttered?
couldn't they have stuttered? 	couldn't I have been stuttering?
couldn't you have been stuttering?
couldn't he have been stuttering?
couldn't we have been stuttering?
couldn't you have been stuttering?
couldn't they have been stuttering?