must matter
Regular verb: matter - mattered- mattered

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