English verb conjugation
COULD VINIFY

Regular verb: vinify - vinified - vinified

Affirmation

Simple form	V-ing form
I could vinify you could vinify she could vinify we could vinify you could vinify they could vinify	I could be vinifying you could be vinifying she could be vinifying we could be vinifying you could be vinifying they could be vinifying
Perfect	V-ing perfect
I could have vinified you could have vinified she could have vinified we could have vinified you could have vinified they could have vinified	I could have been vinifying you could have been vinifying she could have been vinifying we could have been vinifying you could have been vinifying they could have been vinifying

Negation

Simple form	V-ing form
I couldn't vinify you couldn't vinify she couldn't vinify we couldn't vinify you couldn't vinify they couldn't vinify	I couldn't be vinifying you couldn't be vinifying she couldn't be vinifying we couldn't be vinifying you couldn't be vinifying they couldn't be vinifying
Perfect	V-ing perfect
I couldn't have vinified you couldn't have vinified she couldn't have vinified we couldn't have vinified you couldn't have vinified they couldn't have vinified	I couldn't have been vinifying you couldn't have been vinifying she couldn't have been vinifying we couldn't have been vinifying you couldn't have been vinifying they couldn't have been vinifying

Interrogative form

Simple form	V-ing form
could I vinify? could you vinify? could she vinify? could we vinify? could you vinify? could they vinify?	could I be vinifying? could you be vinifying? could she be vinifying? could we be vinifying? could you be vinifying? could they be vinifying?
Perfect	V-ing perfect
could I have vinified? could you have vinified? could she have vinified? could we have vinified? could you have vinified? could they have vinified?	could I have been vinifying? could you have been vinifying? could she have been vinifying? could we have been vinifying? could you have been vinifying? could they have been vinifying?

Interro-negative form

Simple form	V-ing form
couldn't I vinify? couldn't you vinify? couldn't she vinify? couldn't we vinify? couldn't you vinify? couldn't they vinify?	couldn't I be vinifying? couldn't you be vinifying? couldn't she be vinifying? couldn't we be vinifying? couldn't you be vinifying? couldn't they be vinifying?
Perfect	V-ing perfect
couldn't I have vinified? couldn't you have vinified? couldn't she have vinified? couldn't we have vinified? couldn't you have vinified? couldn't they have vinified?	couldn't I have been vinifying? couldn't you have been vinifying? couldn't she have been vinifying? couldn't we have been vinifying? couldn't you have been vinifying? couldn't they have been vinifying?