English verb conjugation
MUST MATTER

Regular verb: matter - mattered - mattered

Affirmation

Simple form	V-ing form
I must matter you must matter he must matter we must matter you must matter they must matter	I must be mattering you must be mattering he must be mattering we must be mattering you must be mattering they must be mattering
Perfect	V-ing perfect
I must have mattered you must have mattered he must have mattered we must have mattered you must have mattered they must have mattered	I must have been mattering you must have been mattering he must have been mattering we must have been mattering you must have been mattering they must have been mattering

Negation

Simple form	V-ing form
I mustn't matter you mustn't matter he mustn't matter we mustn't matter you mustn't matter they mustn't matter	I mustn't be mattering you mustn't be mattering he mustn't be mattering we mustn't be mattering you mustn't be mattering they mustn't be mattering
Perfect	V-ing perfect
I mustn't have mattered you mustn't have mattered he mustn't have mattered we mustn't have mattered you mustn't have mattered they mustn't have mattered	I mustn't have been mattering you mustn't have been mattering he mustn't have been mattering we mustn't have been mattering you mustn't have been mattering they mustn't have been mattering

Interrogative form

Simple form	V-ing form
must I matter? must you matter? must he matter? must we matter? must you matter? must they matter?	must I be mattering? must you be mattering? must he be mattering? must we be mattering? must you be mattering? must they be mattering?
Perfect	V-ing perfect
must I have mattered? must you have mattered? must he have mattered? must we have mattered? must you have mattered? must they have mattered?	must I have been mattering? must you have been mattering? must he have been mattering? must we have been mattering? must you have been mattering? must they have been mattering?

Interro-negative form

Simple form	V-ing form
mustn't I matter? mustn't you matter? mustn't he matter? mustn't we matter? mustn't you matter? mustn't they matter?	mustn't I be mattering? mustn't you be mattering? mustn't he be mattering? mustn't we be mattering? mustn't you be mattering? mustn't they be mattering?
Perfect	V-ing perfect
mustn't I have mattered? mustn't you have mattered? mustn't he have mattered? mustn't we have mattered? mustn't you have mattered? mustn't they have mattered?	mustn't I have been mattering? mustn't you have been mattering? mustn't he have been mattering? mustn't we have been mattering? mustn't you have been mattering? mustn't they have been mattering?