can matter
Regular verb: matter - mattered- mattered

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

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

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

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