I could steamroller you could steamroller he could steamroller we could steamroller you could steamroller they could steamroller
V-ing form
I could be steamrollering you could be steamrollering he could be steamrollering we could be steamrollering you could be steamrollering they could be steamrollering
Perfect
I could have steamrollered you could have steamrollered he could have steamrollered we could have steamrollered you could have steamrollered they could have steamrollered
V-ing perfect
I could have been steamrollering you could have been steamrollering he could have been steamrollering we could have been steamrollering you could have been steamrollering they could have been steamrollering
Negation
Simple form
I could not steamroller you could not steamroller he could not steamroller we could not steamroller you could not steamroller they could not steamroller
V-ing form
I could not be steamrollering you could not be steamrollering he could not be steamrollering we could not be steamrollering you could not be steamrollering they could not be steamrollering
Perfect
I could not have steamrollered you could not have steamrollered he could not have steamrollered we could not have steamrollered you could not have steamrollered they could not have steamrollered
V-ing perfect
I could not have been steamrollering you could not have been steamrollering he could not have been steamrollering we could not have been steamrollering you could not have been steamrollering they could not have been steamrollering
Interrogative form
Simple form
could I steamroller? could you steamroller? could he steamroller? could we steamroller? could you steamroller? could they steamroller?
V-ing form
could I be steamrollering? could you be steamrollering? could he be steamrollering? could we be steamrollering? could you be steamrollering? could they be steamrollering?
Perfect
could I have steamrollered? could you have steamrollered? could he have steamrollered? could we have steamrollered? could you have steamrollered? could they have steamrollered?
V-ing perfect
could I have been steamrollering? could you have been steamrollering? could he have been steamrollering? could we have been steamrollering? could you have been steamrollering? could they have been steamrollering?
Interro-negative form
Simple form
could I not steamroller? could you not steamroller? could he not steamroller? could we not steamroller? could you not steamroller? could they not steamroller?
V-ing form
could I not be steamrollering? could you not be steamrollering? could he not be steamrollering? could we not be steamrollering? could you not be steamrollering? could they not be steamrollering?
Perfect
could I not have steamrollered? could you not have steamrollered? could he not have steamrollered? could we not have steamrollered? could you not have steamrollered? could they not have steamrollered?
V-ing perfect
could I not have been steamrollering? could you not have been steamrollering? could he not have been steamrollering? could we not have been steamrollering? could you not have been steamrollering? could they not have been steamrollering?