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 couldn't vapour you couldn't vapour he couldn't vapour we couldn't vapour you couldn't vapour they couldn't vapour	I couldn't be vapouring you couldn't be vapouring he couldn't be vapouring we couldn't be vapouring you couldn't be vapouring they couldn't be vapouring
Perfect	V-ing perfect
I couldn't have vapoured you couldn't have vapoured he couldn't have vapoured we couldn't have vapoured you couldn't have vapoured they couldn't have vapoured	I couldn't have been vapouring you couldn't have been vapouring he couldn't have been vapouring we couldn't have been vapouring you couldn't have been vapouring they couldn't 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
couldn't I vapour? couldn't you vapour? couldn't he vapour? couldn't we vapour? couldn't you vapour? couldn't they vapour?	couldn't I be vapouring? couldn't you be vapouring? couldn't he be vapouring? couldn't we be vapouring? couldn't you be vapouring? couldn't they be vapouring?
Perfect	V-ing perfect
couldn't I have vapoured? couldn't you have vapoured? couldn't he have vapoured? couldn't we have vapoured? couldn't you have vapoured? couldn't they have vapoured?	couldn't I have been vapouring? couldn't you have been vapouring? couldn't he have been vapouring? couldn't we have been vapouring? couldn't you have been vapouring? couldn't they have been vapouring?