English verb conjugation
COULD BRAIN

Regular verb: brain - brained - brained

Affirmation

Simple form	V-ing form
I could brain you could brain she could brain we could brain you could brain they could brain	I could be braining you could be braining she 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 she 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 she 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 she 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 she 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 she 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 she 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 she brain? could we brain? could you brain? could they brain?	could I be braining? could you be braining? could she 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 she 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 she 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 she 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 she 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 she 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 she have been braining? couldn't we have been braining? couldn't you have been braining? couldn't they have been braining?