I must potroast you must potroast he must potroast we must potroast you must potroast they must potroast
V-ing form
I must be potroasting you must be potroasting he must be potroasting we must be potroasting you must be potroasting they must be potroasting
Perfect
I must have potroasted you must have potroasted he must have potroasted we must have potroasted you must have potroasted they must have potroasted
V-ing perfect
I must have been potroasting you must have been potroasting he must have been potroasting we must have been potroasting you must have been potroasting they must have been potroasting
Negation
Simple form
I must not potroast you must not potroast he must not potroast we must not potroast you must not potroast they must not potroast
V-ing form
I must not be potroasting you must not be potroasting he must not be potroasting we must not be potroasting you must not be potroasting they must not be potroasting
Perfect
I must not have potroasted you must not have potroasted he must not have potroasted we must not have potroasted you must not have potroasted they must not have potroasted
V-ing perfect
I must not have been potroasting you must not have been potroasting he must not have been potroasting we must not have been potroasting you must not have been potroasting they must not have been potroasting
Interrogative form
Simple form
must I potroast? must you potroast? must he potroast? must we potroast? must you potroast? must they potroast?
V-ing form
must I be potroasting? must you be potroasting? must he be potroasting? must we be potroasting? must you be potroasting? must they be potroasting?
Perfect
must I have potroasted? must you have potroasted? must he have potroasted? must we have potroasted? must you have potroasted? must they have potroasted?
V-ing perfect
must I have been potroasting? must you have been potroasting? must he have been potroasting? must we have been potroasting? must you have been potroasting? must they have been potroasting?
Interro-negative form
Simple form
must I not potroast? must you not potroast? must he not potroast? must we not potroast? must you not potroast? must they not potroast?
V-ing form
must I not be potroasting? must you not be potroasting? must he not be potroasting? must we not be potroasting? must you not be potroasting? must they not be potroasting?
Perfect
must I not have potroasted? must you not have potroasted? must he not have potroasted? must we not have potroasted? must you not have potroasted? must they not have potroasted?
V-ing perfect
must I not have been potroasting? must you not have been potroasting? must he not have been potroasting? must we not have been potroasting? must you not have been potroasting? must they not have been potroasting?