English verb conjugation
COULD PROLIFERATE

Regular verb: proliferate - proliferated - proliferated

Affirmation

Simple form	V-ing form
I could proliferate you could proliferate she could proliferate we could proliferate you could proliferate they could proliferate	I could be proliferating you could be proliferating she could be proliferating we could be proliferating you could be proliferating they could be proliferating
Perfect	V-ing perfect
I could have proliferated you could have proliferated she could have proliferated we could have proliferated you could have proliferated they could have proliferated	I could have been proliferating you could have been proliferating she could have been proliferating we could have been proliferating you could have been proliferating they could have been proliferating

Negation

Simple form	V-ing form
I couldn't proliferate you couldn't proliferate she couldn't proliferate we couldn't proliferate you couldn't proliferate they couldn't proliferate	I couldn't be proliferating you couldn't be proliferating she couldn't be proliferating we couldn't be proliferating you couldn't be proliferating they couldn't be proliferating
Perfect	V-ing perfect
I couldn't have proliferated you couldn't have proliferated she couldn't have proliferated we couldn't have proliferated you couldn't have proliferated they couldn't have proliferated	I couldn't have been proliferating you couldn't have been proliferating she couldn't have been proliferating we couldn't have been proliferating you couldn't have been proliferating they couldn't have been proliferating

Interrogative form

Simple form	V-ing form
could I proliferate? could you proliferate? could she proliferate? could we proliferate? could you proliferate? could they proliferate?	could I be proliferating? could you be proliferating? could she be proliferating? could we be proliferating? could you be proliferating? could they be proliferating?
Perfect	V-ing perfect
could I have proliferated? could you have proliferated? could she have proliferated? could we have proliferated? could you have proliferated? could they have proliferated?	could I have been proliferating? could you have been proliferating? could she have been proliferating? could we have been proliferating? could you have been proliferating? could they have been proliferating?

Interro-negative form

Simple form	V-ing form
couldn't I proliferate? couldn't you proliferate? couldn't she proliferate? couldn't we proliferate? couldn't you proliferate? couldn't they proliferate?	couldn't I be proliferating? couldn't you be proliferating? couldn't she be proliferating? couldn't we be proliferating? couldn't you be proliferating? couldn't they be proliferating?
Perfect	V-ing perfect
couldn't I have proliferated? couldn't you have proliferated? couldn't she have proliferated? couldn't we have proliferated? couldn't you have proliferated? couldn't they have proliferated?	couldn't I have been proliferating? couldn't you have been proliferating? couldn't she have been proliferating? couldn't we have been proliferating? couldn't you have been proliferating? couldn't they have been proliferating?