English verb conjugation
MUST STAMMER

Regular verb: stammer - stammered - stammered

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mustn't I stammer? mustn't you stammer? mustn't he stammer? mustn't we stammer? mustn't you stammer? mustn't they stammer?	mustn't I be stammering? mustn't you be stammering? mustn't he be stammering? mustn't we be stammering? mustn't you be stammering? mustn't they be stammering?
Perfect	V-ing perfect
mustn't I have stammered? mustn't you have stammered? mustn't he have stammered? mustn't we have stammered? mustn't you have stammered? mustn't they have stammered?	mustn't I have been stammering? mustn't you have been stammering? mustn't he have been stammering? mustn't we have been stammering? mustn't you have been stammering? mustn't they have been stammering?