English verb conjugation
COULD VAPOUR

Regular verb: vapour - vapoured - vapoured

Affirmation

Simple form	V-ing form
I could vapour you could vapour he could vapour we could vapour you could vapour they could vapour	I could be vapouring you could be vapouring he could be vapouring we could be vapouring you could be vapouring they could be vapouring
Perfect	V-ing perfect
I could have vapoured you could have vapoured he could have vapoured we could have vapoured you could have vapoured they could have vapoured	I could have been vapouring you could have been vapouring he could have been vapouring we could have been vapouring you could have been vapouring they could have been vapouring

Negation

Simple form	V-ing form
I could not vapour you could not vapour he could not vapour we could not vapour you could not vapour they could not vapour	I could not be vapouring you could not be vapouring he could not be vapouring we could not be vapouring you could not be vapouring they could not be vapouring
Perfect	V-ing perfect
I could not have vapoured you could not have vapoured he could not have vapoured we could not have vapoured you could not have vapoured they could not have vapoured	I could not have been vapouring you could not have been vapouring he could not have been vapouring we could not have been vapouring you could not have been vapouring they could not have been vapouring

Interrogative form

Simple form	V-ing form
could I vapour? could you vapour? could he vapour? could we vapour? could you vapour? could they vapour?	could I be vapouring? could you be vapouring? could he be vapouring? could we be vapouring? could you be vapouring? could they be vapouring?
Perfect	V-ing perfect
could I have vapoured? could you have vapoured? could he have vapoured? could we have vapoured? could you have vapoured? could they have vapoured?	could I have been vapouring? could you have been vapouring? could he have been vapouring? could we have been vapouring? could you have been vapouring? could they have been vapouring?

Interro-negative form

Simple form	V-ing form
could I not vapour? could you not vapour? could he not vapour? could we not vapour? could you not vapour? could they not vapour?	could I not be vapouring? could you not be vapouring? could he not be vapouring? could we not be vapouring? could you not be vapouring? could they not be vapouring?
Perfect	V-ing perfect
could I not have vapoured? could you not have vapoured? could he not have vapoured? could we not have vapoured? could you not have vapoured? could they not have vapoured?	could I not have been vapouring? could you not have been vapouring? could he not have been vapouring? could we not have been vapouring? could you not have been vapouring? could they not have been vapouring?