I could route you could route he could route we could route you could route they could route
V-ing form
I could be routing you could be routing he could be routing we could be routing you could be routing they could be routing
Perfect
I could have routed you could have routed he could have routed we could have routed you could have routed they could have routed
V-ing perfect
I could have been routing you could have been routing he could have been routing we could have been routing you could have been routing they could have been routing
Negation
Simple form
I could not route you could not route he could not route we could not route you could not route they could not route
V-ing form
I could not be routing you could not be routing he could not be routing we could not be routing you could not be routing they could not be routing
Perfect
I could not have routed you could not have routed he could not have routed we could not have routed you could not have routed they could not have routed
V-ing perfect
I could not have been routing you could not have been routing he could not have been routing we could not have been routing you could not have been routing they could not have been routing
Interrogative form
Simple form
could I route? could you route? could he route? could we route? could you route? could they route?
V-ing form
could I be routing? could you be routing? could he be routing? could we be routing? could you be routing? could they be routing?
Perfect
could I have routed? could you have routed? could he have routed? could we have routed? could you have routed? could they have routed?
V-ing perfect
could I have been routing? could you have been routing? could he have been routing? could we have been routing? could you have been routing? could they have been routing?
Interro-negative form
Simple form
could I not route? could you not route? could he not route? could we not route? could you not route? could they not route?
V-ing form
could I not be routing? could you not be routing? could he not be routing? could we not be routing? could you not be routing? could they not be routing?
Perfect
could I not have routed? could you not have routed? could he not have routed? could we not have routed? could you not have routed? could they not have routed?
V-ing perfect
could I not have been routing? could you not have been routing? could he not have been routing? could we not have been routing? could you not have been routing? could they not have been routing?