I could chamber you could chamber he could chamber we could chamber you could chamber they could chamber
V-ing form
I could be chambering you could be chambering he could be chambering we could be chambering you could be chambering they could be chambering
Perfect
I could have chambered you could have chambered he could have chambered we could have chambered you could have chambered they could have chambered
V-ing perfect
I could have been chambering you could have been chambering he could have been chambering we could have been chambering you could have been chambering they could have been chambering
Negation
Simple form
I couldn't chamber you couldn't chamber he couldn't chamber we couldn't chamber you couldn't chamber they couldn't chamber
V-ing form
I couldn't be chambering you couldn't be chambering he couldn't be chambering we couldn't be chambering you couldn't be chambering they couldn't be chambering
Perfect
I couldn't have chambered you couldn't have chambered he couldn't have chambered we couldn't have chambered you couldn't have chambered they couldn't have chambered
V-ing perfect
I couldn't have been chambering you couldn't have been chambering he couldn't have been chambering we couldn't have been chambering you couldn't have been chambering they couldn't have been chambering
Interrogative form
Simple form
could I chamber? could you chamber? could he chamber? could we chamber? could you chamber? could they chamber?
V-ing form
could I be chambering? could you be chambering? could he be chambering? could we be chambering? could you be chambering? could they be chambering?
Perfect
could I have chambered? could you have chambered? could he have chambered? could we have chambered? could you have chambered? could they have chambered?
V-ing perfect
could I have been chambering? could you have been chambering? could he have been chambering? could we have been chambering? could you have been chambering? could they have been chambering?
Interro-negative form
Simple form
couldn't I chamber? couldn't you chamber? couldn't he chamber? couldn't we chamber? couldn't you chamber? couldn't they chamber?
V-ing form
couldn't I be chambering? couldn't you be chambering? couldn't he be chambering? couldn't we be chambering? couldn't you be chambering? couldn't they be chambering?
Perfect
couldn't I have chambered? couldn't you have chambered? couldn't he have chambered? couldn't we have chambered? couldn't you have chambered? couldn't they have chambered?
V-ing perfect
couldn't I have been chambering? couldn't you have been chambering? couldn't he have been chambering? couldn't we have been chambering? couldn't you have been chambering? couldn't they have been chambering?