could matter
Verbo regular: matter - mattered- mattered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could matter
you could matter
she could matter
we could matter
you could matter
they could matter 	I could be mattering
you could be mattering
she could be mattering
we could be mattering
you could be mattering
they could be mattering	I could have mattered
you could have mattered
she could have mattered
we could have mattered
you could have mattered
they could have mattered	I could have been mattering
you could have been mattering
she could have been mattering
we could have been mattering
you could have been mattering
they could have been mattering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not matter
you could not matter
she could not matter
we could not matter
you could not matter
they could not matter 	I could not be mattering
you could not be mattering
she could not be mattering
we could not be mattering
you could not be mattering
they could not be mattering	I could not have mattered
you could not have mattered
she could not have mattered
we could not have mattered
you could not have mattered
they could not have mattered	I could not have been mattering
you could not have been mattering
she could not have been mattering
we could not have been mattering
you could not have been mattering
they could not have been mattering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I matter?
could you matter?
could she matter?
could we matter?
could you matter?
could they matter? 	could I be mattering?
could you be mattering?
could she be mattering?
could we be mattering?
could you be mattering?
could they be mattering? 	could I have mattered?
could you have mattered?
could she have mattered?
could we have mattered?
could you have mattered?
could they have mattered? 	could I have been mattering?
could you have been mattering?
could she have been mattering?
could we have been mattering?
could you have been mattering?
could they have been mattering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not matter?
could you not matter?
could she not matter?
could we not matter?
could you not matter?
could they not matter? 	could I not be mattering?
could you not be mattering?
could she not be mattering?
could we not be mattering?
could you not be mattering?
could they not be mattering? 	could I not have mattered?
could you not have mattered?
could she not have mattered?
could we not have mattered?
could you not have mattered?
could they not have mattered? 	could I not have been mattering?
could you not have been mattering?
could she not have been mattering?
could we not have been mattering?
could you not have been mattering?
could they not have been mattering?