English verb conjugation
COULD DARN

Regular verb: darn - darned - darned

Affirmation

Simple form	V-ing form
I could darn you could darn he could darn we could darn you could darn they could darn	I could be darning you could be darning he could be darning we could be darning you could be darning they could be darning
Perfect	V-ing perfect
I could have darned you could have darned he could have darned we could have darned you could have darned they could have darned	I could have been darning you could have been darning he could have been darning we could have been darning you could have been darning they could have been darning

Negation

Simple form	V-ing form
I couldn't darn you couldn't darn he couldn't darn we couldn't darn you couldn't darn they couldn't darn	I couldn't be darning you couldn't be darning he couldn't be darning we couldn't be darning you couldn't be darning they couldn't be darning
Perfect	V-ing perfect
I couldn't have darned you couldn't have darned he couldn't have darned we couldn't have darned you couldn't have darned they couldn't have darned	I couldn't have been darning you couldn't have been darning he couldn't have been darning we couldn't have been darning you couldn't have been darning they couldn't have been darning

Interrogative form

Simple form	V-ing form
could I darn? could you darn? could he darn? could we darn? could you darn? could they darn?	could I be darning? could you be darning? could he be darning? could we be darning? could you be darning? could they be darning?
Perfect	V-ing perfect
could I have darned? could you have darned? could he have darned? could we have darned? could you have darned? could they have darned?	could I have been darning? could you have been darning? could he have been darning? could we have been darning? could you have been darning? could they have been darning?

Interro-negative form

Simple form	V-ing form
couldn't I darn? couldn't you darn? couldn't he darn? couldn't we darn? couldn't you darn? couldn't they darn?	couldn't I be darning? couldn't you be darning? couldn't he be darning? couldn't we be darning? couldn't you be darning? couldn't they be darning?
Perfect	V-ing perfect
couldn't I have darned? couldn't you have darned? couldn't he have darned? couldn't we have darned? couldn't you have darned? couldn't they have darned?	couldn't I have been darning? couldn't you have been darning? couldn't he have been darning? couldn't we have been darning? couldn't you have been darning? couldn't they have been darning?