could mat
Verbo regular: mat - matted- matted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could mat
you could mat
she could mat
we could mat
you could mat
they could mat 	I could be matting
you could be matting
she could be matting
we could be matting
you could be matting
they could be matting	I could have matted
you could have matted
she could have matted
we could have matted
you could have matted
they could have matted	I could have been matting
you could have been matting
she could have been matting
we could have been matting
you could have been matting
they could have been matting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't mat
you couldn't mat
she couldn't mat
we couldn't mat
you couldn't mat
they couldn't mat 	I couldn't be matting
you couldn't be matting
she couldn't be matting
we couldn't be matting
you couldn't be matting
they couldn't be matting	I couldn't have matted
you couldn't have matted
she couldn't have matted
we couldn't have matted
you couldn't have matted
they couldn't have matted	I couldn't have been matting
you couldn't have been matting
she couldn't have been matting
we couldn't have been matting
you couldn't have been matting
they couldn't have been matting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I mat?
could you mat?
could she mat?
could we mat?
could you mat?
could they mat? 	could I be matting?
could you be matting?
could she be matting?
could we be matting?
could you be matting?
could they be matting? 	could I have matted?
could you have matted?
could she have matted?
could we have matted?
could you have matted?
could they have matted? 	could I have been matting?
could you have been matting?
could she have been matting?
could we have been matting?
could you have been matting?
could they have been matting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I mat?
couldn't you mat?
couldn't she mat?
couldn't we mat?
couldn't you mat?
couldn't they mat? 	couldn't I be matting?
couldn't you be matting?
couldn't she be matting?
couldn't we be matting?
couldn't you be matting?
couldn't they be matting? 	couldn't I have matted?
couldn't you have matted?
couldn't she have matted?
couldn't we have matted?
couldn't you have matted?
couldn't they have matted? 	couldn't I have been matting?
couldn't you have been matting?
couldn't she have been matting?
couldn't we have been matting?
couldn't you have been matting?
couldn't they have been matting?