must stutter
Verbo regular: stutter - stuttered- stuttered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must stutter
you must stutter
he must stutter
we must stutter
you must stutter
they must stutter 	I must be stuttering
you must be stuttering
he must be stuttering
we must be stuttering
you must be stuttering
they must be stuttering	I must have stuttered
you must have stuttered
he must have stuttered
we must have stuttered
you must have stuttered
they must have stuttered	I must have been stuttering
you must have been stuttering
he must have been stuttering
we must have been stuttering
you must have been stuttering
they must have been stuttering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not stutter
you must not stutter
he must not stutter
we must not stutter
you must not stutter
they must not stutter 	I must not be stuttering
you must not be stuttering
he must not be stuttering
we must not be stuttering
you must not be stuttering
they must not be stuttering	I must not have stuttered
you must not have stuttered
he must not have stuttered
we must not have stuttered
you must not have stuttered
they must not have stuttered	I must not have been stuttering
you must not have been stuttering
he must not have been stuttering
we must not have been stuttering
you must not have been stuttering
they must not have been stuttering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I stutter?
must you stutter?
must he stutter?
must we stutter?
must you stutter?
must they stutter? 	must I be stuttering?
must you be stuttering?
must he be stuttering?
must we be stuttering?
must you be stuttering?
must they be stuttering? 	must I have stuttered?
must you have stuttered?
must he have stuttered?
must we have stuttered?
must you have stuttered?
must they have stuttered? 	must I have been stuttering?
must you have been stuttering?
must he have been stuttering?
must we have been stuttering?
must you have been stuttering?
must they have been stuttering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not stutter?
must you not stutter?
must he not stutter?
must we not stutter?
must you not stutter?
must they not stutter? 	must I not be stuttering?
must you not be stuttering?
must he not be stuttering?
must we not be stuttering?
must you not be stuttering?
must they not be stuttering? 	must I not have stuttered?
must you not have stuttered?
must he not have stuttered?
must we not have stuttered?
must you not have stuttered?
must they not have stuttered? 	must I not have been stuttering?
must you not have been stuttering?
must he not have been stuttering?
must we not have been stuttering?
must you not have been stuttering?
must they not have been stuttering?