English verb conjugation
COULD PAIN

Regular verb: pain - pained - pained

Affirmation

Simple form	V-ing form
I could pain you could pain he could pain we could pain you could pain they could pain	I could be paining you could be paining he could be paining we could be paining you could be paining they could be paining
Perfect	V-ing perfect
I could have pained you could have pained he could have pained we could have pained you could have pained they could have pained	I could have been paining you could have been paining he could have been paining we could have been paining you could have been paining they could have been paining

Negation

Simple form	V-ing form
I couldn't pain you couldn't pain he couldn't pain we couldn't pain you couldn't pain they couldn't pain	I couldn't be paining you couldn't be paining he couldn't be paining we couldn't be paining you couldn't be paining they couldn't be paining
Perfect	V-ing perfect
I couldn't have pained you couldn't have pained he couldn't have pained we couldn't have pained you couldn't have pained they couldn't have pained	I couldn't have been paining you couldn't have been paining he couldn't have been paining we couldn't have been paining you couldn't have been paining they couldn't have been paining

Interrogative form

Simple form	V-ing form
could I pain? could you pain? could he pain? could we pain? could you pain? could they pain?	could I be paining? could you be paining? could he be paining? could we be paining? could you be paining? could they be paining?
Perfect	V-ing perfect
could I have pained? could you have pained? could he have pained? could we have pained? could you have pained? could they have pained?	could I have been paining? could you have been paining? could he have been paining? could we have been paining? could you have been paining? could they have been paining?

Interro-negative form

Simple form	V-ing form
couldn't I pain? couldn't you pain? couldn't he pain? couldn't we pain? couldn't you pain? couldn't they pain?	couldn't I be paining? couldn't you be paining? couldn't he be paining? couldn't we be paining? couldn't you be paining? couldn't they be paining?
Perfect	V-ing perfect
couldn't I have pained? couldn't you have pained? couldn't he have pained? couldn't we have pained? couldn't you have pained? couldn't they have pained?	couldn't I have been paining? couldn't you have been paining? couldn't he have been paining? couldn't we have been paining? couldn't you have been paining? couldn't they have been paining?