I could lever you could lever he could lever we could lever you could lever they could lever
V-ing form
I could be levering you could be levering he could be levering we could be levering you could be levering they could be levering
Perfect
I could have levered you could have levered he could have levered we could have levered you could have levered they could have levered
V-ing perfect
I could have been levering you could have been levering he could have been levering we could have been levering you could have been levering they could have been levering
Negation
Simple form
I could not lever you could not lever he could not lever we could not lever you could not lever they could not lever
V-ing form
I could not be levering you could not be levering he could not be levering we could not be levering you could not be levering they could not be levering
Perfect
I could not have levered you could not have levered he could not have levered we could not have levered you could not have levered they could not have levered
V-ing perfect
I could not have been levering you could not have been levering he could not have been levering we could not have been levering you could not have been levering they could not have been levering
Interrogative form
Simple form
could I lever? could you lever? could he lever? could we lever? could you lever? could they lever?
V-ing form
could I be levering? could you be levering? could he be levering? could we be levering? could you be levering? could they be levering?
Perfect
could I have levered? could you have levered? could he have levered? could we have levered? could you have levered? could they have levered?
V-ing perfect
could I have been levering? could you have been levering? could he have been levering? could we have been levering? could you have been levering? could they have been levering?
Interro-negative form
Simple form
could I not lever? could you not lever? could he not lever? could we not lever? could you not lever? could they not lever?
V-ing form
could I not be levering? could you not be levering? could he not be levering? could we not be levering? could you not be levering? could they not be levering?
Perfect
could I not have levered? could you not have levered? could he not have levered? could we not have levered? could you not have levered? could they not have levered?
V-ing perfect
could I not have been levering? could you not have been levering? could he not have been levering? could we not have been levering? could you not have been levering? could they not have been levering?