English verb conjugation
COULD TUFT

Regular verb: tuft - tufted - tufted

Affirmation

Simple form	V-ing form
I could tuft you could tuft he could tuft we could tuft you could tuft they could tuft	I could be tufting you could be tufting he could be tufting we could be tufting you could be tufting they could be tufting
Perfect	V-ing perfect
I could have tufted you could have tufted he could have tufted we could have tufted you could have tufted they could have tufted	I could have been tufting you could have been tufting he could have been tufting we could have been tufting you could have been tufting they could have been tufting

Negation

Simple form	V-ing form
I couldn't tuft you couldn't tuft he couldn't tuft we couldn't tuft you couldn't tuft they couldn't tuft	I couldn't be tufting you couldn't be tufting he couldn't be tufting we couldn't be tufting you couldn't be tufting they couldn't be tufting
Perfect	V-ing perfect
I couldn't have tufted you couldn't have tufted he couldn't have tufted we couldn't have tufted you couldn't have tufted they couldn't have tufted	I couldn't have been tufting you couldn't have been tufting he couldn't have been tufting we couldn't have been tufting you couldn't have been tufting they couldn't have been tufting

Interrogative form

Simple form	V-ing form
could I tuft? could you tuft? could he tuft? could we tuft? could you tuft? could they tuft?	could I be tufting? could you be tufting? could he be tufting? could we be tufting? could you be tufting? could they be tufting?
Perfect	V-ing perfect
could I have tufted? could you have tufted? could he have tufted? could we have tufted? could you have tufted? could they have tufted?	could I have been tufting? could you have been tufting? could he have been tufting? could we have been tufting? could you have been tufting? could they have been tufting?

Interro-negative form

Simple form	V-ing form
couldn't I tuft? couldn't you tuft? couldn't he tuft? couldn't we tuft? couldn't you tuft? couldn't they tuft?	couldn't I be tufting? couldn't you be tufting? couldn't he be tufting? couldn't we be tufting? couldn't you be tufting? couldn't they be tufting?
Perfect	V-ing perfect
couldn't I have tufted? couldn't you have tufted? couldn't he have tufted? couldn't we have tufted? couldn't you have tufted? couldn't they have tufted?	couldn't I have been tufting? couldn't you have been tufting? couldn't he have been tufting? couldn't we have been tufting? couldn't you have been tufting? couldn't they have been tufting?