English verb conjugation
CAN MATTER

Regular verb: matter - mattered - mattered

Affirmation

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