English verb conjugation
COULD PAINT

Regular verb: paint - painted - painted

Affirmation

Simple form	V-ing form
I could paint you could paint she could paint we could paint you could paint they could paint	I could be painting you could be painting she could be painting we could be painting you could be painting they could be painting
Perfect	V-ing perfect
I could have painted you could have painted she could have painted we could have painted you could have painted they could have painted	I could have been painting you could have been painting she could have been painting we could have been painting you could have been painting they could have been painting

Negation

Simple form	V-ing form
I could not paint you could not paint she could not paint we could not paint you could not paint they could not paint	I could not be painting you could not be painting she could not be painting we could not be painting you could not be painting they could not be painting
Perfect	V-ing perfect
I could not have painted you could not have painted she could not have painted we could not have painted you could not have painted they could not have painted	I could not have been painting you could not have been painting she could not have been painting we could not have been painting you could not have been painting they could not have been painting

Interrogative form

Simple form	V-ing form
could I paint? could you paint? could she paint? could we paint? could you paint? could they paint?	could I be painting? could you be painting? could she be painting? could we be painting? could you be painting? could they be painting?
Perfect	V-ing perfect
could I have painted? could you have painted? could she have painted? could we have painted? could you have painted? could they have painted?	could I have been painting? could you have been painting? could she have been painting? could we have been painting? could you have been painting? could they have been painting?

Interro-negative form

Simple form	V-ing form
could I not paint? could you not paint? could she not paint? could we not paint? could you not paint? could they not paint?	could I not be painting? could you not be painting? could she not be painting? could we not be painting? could you not be painting? could they not be painting?
Perfect	V-ing perfect
could I not have painted? could you not have painted? could she not have painted? could we not have painted? could you not have painted? could they not have painted?	could I not have been painting? could you not have been painting? could she not have been painting? could we not have been painting? could you not have been painting? could they not have been painting?