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