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 must not matter you must not matter he must not matter we must not matter you must not matter they must not matter	I must not be mattering you must not be mattering he must not be mattering we must not be mattering you must not be mattering they must not be mattering
Perfect	V-ing perfect
I must not have mattered you must not have mattered he must not have mattered we must not have mattered you must not have mattered they must not have mattered	I must not have been mattering you must not have been mattering he must not have been mattering we must not have been mattering you must not have been mattering they must not 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
must I not matter? must you not matter? must he not matter? must we not matter? must you not matter? must they not matter?	must I not be mattering? must you not be mattering? must he not be mattering? must we not be mattering? must you not be mattering? must they not be mattering?
Perfect	V-ing perfect
must I not have mattered? must you not have mattered? must he not have mattered? must we not have mattered? must you not have mattered? must they not have mattered?	must I not have been mattering? must you not have been mattering? must he not have been mattering? must we not have been mattering? must you not have been mattering? must they not have been mattering?