English verb conjugation
COULD VAPOR

Regular verb: vapor - vapored - vapored

Affirmation

Simple form	V-ing form
I could vapor you could vapor he could vapor we could vapor you could vapor they could vapor	I could be vaporing you could be vaporing he could be vaporing we could be vaporing you could be vaporing they could be vaporing
Perfect	V-ing perfect
I could have vapored you could have vapored he could have vapored we could have vapored you could have vapored they could have vapored	I could have been vaporing you could have been vaporing he could have been vaporing we could have been vaporing you could have been vaporing they could have been vaporing

Negation

Simple form	V-ing form
I could not vapor you could not vapor he could not vapor we could not vapor you could not vapor they could not vapor	I could not be vaporing you could not be vaporing he could not be vaporing we could not be vaporing you could not be vaporing they could not be vaporing
Perfect	V-ing perfect
I could not have vapored you could not have vapored he could not have vapored we could not have vapored you could not have vapored they could not have vapored	I could not have been vaporing you could not have been vaporing he could not have been vaporing we could not have been vaporing you could not have been vaporing they could not have been vaporing

Interrogative form

Simple form	V-ing form
could I vapor? could you vapor? could he vapor? could we vapor? could you vapor? could they vapor?	could I be vaporing? could you be vaporing? could he be vaporing? could we be vaporing? could you be vaporing? could they be vaporing?
Perfect	V-ing perfect
could I have vapored? could you have vapored? could he have vapored? could we have vapored? could you have vapored? could they have vapored?	could I have been vaporing? could you have been vaporing? could he have been vaporing? could we have been vaporing? could you have been vaporing? could they have been vaporing?

Interro-negative form

Simple form	V-ing form
could I not vapor? could you not vapor? could he not vapor? could we not vapor? could you not vapor? could they not vapor?	could I not be vaporing? could you not be vaporing? could he not be vaporing? could we not be vaporing? could you not be vaporing? could they not be vaporing?
Perfect	V-ing perfect
could I not have vapored? could you not have vapored? could he not have vapored? could we not have vapored? could you not have vapored? could they not have vapored?	could I not have been vaporing? could you not have been vaporing? could he not have been vaporing? could we not have been vaporing? could you not have been vaporing? could they not have been vaporing?