English verb conjugation
COULD MAT

Regular verb: mat - matted - matted

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?