English verb conjugation
COULD BRAIN

Regular verb: brain - brained - brained

Affirmation

Simple form	V-ing form
I could brain you could brain he could brain we could brain you could brain they could brain	I could be braining you could be braining he could be braining we could be braining you could be braining they could be braining
Perfect	V-ing perfect
I could have brained you could have brained he could have brained we could have brained you could have brained they could have brained	I could have been braining you could have been braining he could have been braining we could have been braining you could have been braining they could have been braining

Negation

Simple form	V-ing form
I couldn't brain you couldn't brain he couldn't brain we couldn't brain you couldn't brain they couldn't brain	I couldn't be braining you couldn't be braining he couldn't be braining we couldn't be braining you couldn't be braining they couldn't be braining
Perfect	V-ing perfect
I couldn't have brained you couldn't have brained he couldn't have brained we couldn't have brained you couldn't have brained they couldn't have brained	I couldn't have been braining you couldn't have been braining he couldn't have been braining we couldn't have been braining you couldn't have been braining they couldn't have been braining

Interrogative form

Simple form	V-ing form
could I brain? could you brain? could he brain? could we brain? could you brain? could they brain?	could I be braining? could you be braining? could he be braining? could we be braining? could you be braining? could they be braining?
Perfect	V-ing perfect
could I have brained? could you have brained? could he have brained? could we have brained? could you have brained? could they have brained?	could I have been braining? could you have been braining? could he have been braining? could we have been braining? could you have been braining? could they have been braining?

Interro-negative form

Simple form	V-ing form
couldn't I brain? couldn't you brain? couldn't he brain? couldn't we brain? couldn't you brain? couldn't they brain?	couldn't I be braining? couldn't you be braining? couldn't he be braining? couldn't we be braining? couldn't you be braining? couldn't they be braining?
Perfect	V-ing perfect
couldn't I have brained? couldn't you have brained? couldn't he have brained? couldn't we have brained? couldn't you have brained? couldn't they have brained?	couldn't I have been braining? couldn't you have been braining? couldn't he have been braining? couldn't we have been braining? couldn't you have been braining? couldn't they have been braining?