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 could not brain you could not brain he could not brain we could not brain you could not brain they could not brain	I could not be braining you could not be braining he could not be braining we could not be braining you could not be braining they could not be braining
Perfect	V-ing perfect
I could not have brained you could not have brained he could not have brained we could not have brained you could not have brained they could not have brained	I could not have been braining you could not have been braining he could not have been braining we could not have been braining you could not have been braining they could not 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
could I not brain? could you not brain? could he not brain? could we not brain? could you not brain? could they not brain?	could I not be braining? could you not be braining? could he not be braining? could we not be braining? could you not be braining? could they not be braining?
Perfect	V-ing perfect
could I not have brained? could you not have brained? could he not have brained? could we not have brained? could you not have brained? could they not have brained?	could I not have been braining? could you not have been braining? could he not have been braining? could we not have been braining? could you not have been braining? could they not have been braining?