I could proliferate you could proliferate she could proliferate we could proliferate you could proliferate they could proliferate
V-ing form
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
I could have proliferated you could have proliferated she could have proliferated we could have proliferated you could have proliferated they could have proliferated
V-ing perfect
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
I could not proliferate you could not proliferate she could not proliferate we could not proliferate you could not proliferate they could not proliferate
V-ing form
I could not be proliferating you could not be proliferating she could not be proliferating we could not be proliferating you could not be proliferating they could not be proliferating
Perfect
I could not have proliferated you could not have proliferated she could not have proliferated we could not have proliferated you could not have proliferated they could not have proliferated
V-ing perfect
I could not have been proliferating you could not have been proliferating she could not have been proliferating we could not have been proliferating you could not have been proliferating they could not have been proliferating
Interrogative form
Simple form
could I proliferate? could you proliferate? could she proliferate? could we proliferate? could you proliferate? could they proliferate?
V-ing form
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
could I have proliferated? could you have proliferated? could she have proliferated? could we have proliferated? could you have proliferated? could they have proliferated?
V-ing perfect
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
could I not proliferate? could you not proliferate? could she not proliferate? could we not proliferate? could you not proliferate? could they not proliferate?
V-ing form
could I not be proliferating? could you not be proliferating? could she not be proliferating? could we not be proliferating? could you not be proliferating? could they not be proliferating?
Perfect
could I not have proliferated? could you not have proliferated? could she not have proliferated? could we not have proliferated? could you not have proliferated? could they not have proliferated?
V-ing perfect
could I not have been proliferating? could you not have been proliferating? could she not have been proliferating? could we not have been proliferating? could you not have been proliferating? could they not have been proliferating?