I could premier you could premier she could premier we could premier you could premier they could premier
V-ing form
I could be premiering you could be premiering she could be premiering we could be premiering you could be premiering they could be premiering
Perfect
I could have premiered you could have premiered she could have premiered we could have premiered you could have premiered they could have premiered
V-ing perfect
I could have been premiering you could have been premiering she could have been premiering we could have been premiering you could have been premiering they could have been premiering
Negation
Simple form
I couldn't premier you couldn't premier she couldn't premier we couldn't premier you couldn't premier they couldn't premier
V-ing form
I couldn't be premiering you couldn't be premiering she couldn't be premiering we couldn't be premiering you couldn't be premiering they couldn't be premiering
Perfect
I couldn't have premiered you couldn't have premiered she couldn't have premiered we couldn't have premiered you couldn't have premiered they couldn't have premiered
V-ing perfect
I couldn't have been premiering you couldn't have been premiering she couldn't have been premiering we couldn't have been premiering you couldn't have been premiering they couldn't have been premiering
Interrogative form
Simple form
could I premier? could you premier? could she premier? could we premier? could you premier? could they premier?
V-ing form
could I be premiering? could you be premiering? could she be premiering? could we be premiering? could you be premiering? could they be premiering?
Perfect
could I have premiered? could you have premiered? could she have premiered? could we have premiered? could you have premiered? could they have premiered?
V-ing perfect
could I have been premiering? could you have been premiering? could she have been premiering? could we have been premiering? could you have been premiering? could they have been premiering?
Interro-negative form
Simple form
couldn't I premier? couldn't you premier? couldn't she premier? couldn't we premier? couldn't you premier? couldn't they premier?
V-ing form
couldn't I be premiering? couldn't you be premiering? couldn't she be premiering? couldn't we be premiering? couldn't you be premiering? couldn't they be premiering?
Perfect
couldn't I have premiered? couldn't you have premiered? couldn't she have premiered? couldn't we have premiered? couldn't you have premiered? couldn't they have premiered?
V-ing perfect
couldn't I have been premiering? couldn't you have been premiering? couldn't she have been premiering? couldn't we have been premiering? couldn't you have been premiering? couldn't they have been premiering?