could matter
Verbo regular: matter - mattered- mattered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could matter
you could matter
he could matter
we could matter
you could matter
they could matter 	I could be mattering
you could be mattering
he could be mattering
we could be mattering
you could be mattering
they could be mattering	I could have mattered
you could have mattered
he 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
he could have been mattering
we could have been mattering
you could have been mattering
they could have been mattering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't matter
you couldn't matter
he couldn't matter
we couldn't matter
you couldn't matter
they couldn't matter 	I couldn't be mattering
you couldn't be mattering
he couldn't be mattering
we couldn't be mattering
you couldn't be mattering
they couldn't be mattering	I couldn't have mattered
you couldn't have mattered
he couldn't have mattered
we couldn't have mattered
you couldn't have mattered
they couldn't have mattered	I couldn't have been mattering
you couldn't have been mattering
he couldn't have been mattering
we couldn't have been mattering
you couldn't have been mattering
they couldn't have been mattering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I matter?
could you matter?
could he matter?
could we matter?
could you matter?
could they matter? 	could I be mattering?
could you be mattering?
could he be mattering?
could we be mattering?
could you be mattering?
could they be mattering? 	could I have mattered?
could you have mattered?
could he 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 he have been mattering?
could we have been mattering?
could you have been mattering?
could they have been mattering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I matter?
couldn't you matter?
couldn't he matter?
couldn't we matter?
couldn't you matter?
couldn't they matter? 	couldn't I be mattering?
couldn't you be mattering?
couldn't he be mattering?
couldn't we be mattering?
couldn't you be mattering?
couldn't they be mattering? 	couldn't I have mattered?
couldn't you have mattered?
couldn't he have mattered?
couldn't we have mattered?
couldn't you have mattered?
couldn't they have mattered? 	couldn't I have been mattering?
couldn't you have been mattering?
couldn't he have been mattering?
couldn't we have been mattering?
couldn't you have been mattering?
couldn't they have been mattering?