English verb conjugation
COULD SPROUT

Regular verb: sprout - sprouted - sprouted

Affirmation

Simple form	V-ing form
I could sprout you could sprout he could sprout we could sprout you could sprout they could sprout	I could be sprouting you could be sprouting he could be sprouting we could be sprouting you could be sprouting they could be sprouting
Perfect	V-ing perfect
I could have sprouted you could have sprouted he could have sprouted we could have sprouted you could have sprouted they could have sprouted	I could have been sprouting you could have been sprouting he could have been sprouting we could have been sprouting you could have been sprouting they could have been sprouting

Negation

Simple form	V-ing form
I couldn't sprout you couldn't sprout he couldn't sprout we couldn't sprout you couldn't sprout they couldn't sprout	I couldn't be sprouting you couldn't be sprouting he couldn't be sprouting we couldn't be sprouting you couldn't be sprouting they couldn't be sprouting
Perfect	V-ing perfect
I couldn't have sprouted you couldn't have sprouted he couldn't have sprouted we couldn't have sprouted you couldn't have sprouted they couldn't have sprouted	I couldn't have been sprouting you couldn't have been sprouting he couldn't have been sprouting we couldn't have been sprouting you couldn't have been sprouting they couldn't have been sprouting

Interrogative form

Simple form	V-ing form
could I sprout? could you sprout? could he sprout? could we sprout? could you sprout? could they sprout?	could I be sprouting? could you be sprouting? could he be sprouting? could we be sprouting? could you be sprouting? could they be sprouting?
Perfect	V-ing perfect
could I have sprouted? could you have sprouted? could he have sprouted? could we have sprouted? could you have sprouted? could they have sprouted?	could I have been sprouting? could you have been sprouting? could he have been sprouting? could we have been sprouting? could you have been sprouting? could they have been sprouting?

Interro-negative form

Simple form	V-ing form
couldn't I sprout? couldn't you sprout? couldn't he sprout? couldn't we sprout? couldn't you sprout? couldn't they sprout?	couldn't I be sprouting? couldn't you be sprouting? couldn't he be sprouting? couldn't we be sprouting? couldn't you be sprouting? couldn't they be sprouting?
Perfect	V-ing perfect
couldn't I have sprouted? couldn't you have sprouted? couldn't he have sprouted? couldn't we have sprouted? couldn't you have sprouted? couldn't they have sprouted?	couldn't I have been sprouting? couldn't you have been sprouting? couldn't he have been sprouting? couldn't we have been sprouting? couldn't you have been sprouting? couldn't they have been sprouting?