I must devour you must devour he must devour we must devour you must devour they must devour
V-ing form
I must be devouring you must be devouring he must be devouring we must be devouring you must be devouring they must be devouring
Perfect
I must have devoured you must have devoured he must have devoured we must have devoured you must have devoured they must have devoured
V-ing perfect
I must have been devouring you must have been devouring he must have been devouring we must have been devouring you must have been devouring they must have been devouring
Negation
Simple form
I must not devour you must not devour he must not devour we must not devour you must not devour they must not devour
V-ing form
I must not be devouring you must not be devouring he must not be devouring we must not be devouring you must not be devouring they must not be devouring
Perfect
I must not have devoured you must not have devoured he must not have devoured we must not have devoured you must not have devoured they must not have devoured
V-ing perfect
I must not have been devouring you must not have been devouring he must not have been devouring we must not have been devouring you must not have been devouring they must not have been devouring
Interrogative form
Simple form
must I devour? must you devour? must he devour? must we devour? must you devour? must they devour?
V-ing form
must I be devouring? must you be devouring? must he be devouring? must we be devouring? must you be devouring? must they be devouring?
Perfect
must I have devoured? must you have devoured? must he have devoured? must we have devoured? must you have devoured? must they have devoured?
V-ing perfect
must I have been devouring? must you have been devouring? must he have been devouring? must we have been devouring? must you have been devouring? must they have been devouring?
Interro-negative form
Simple form
must I not devour? must you not devour? must he not devour? must we not devour? must you not devour? must they not devour?
V-ing form
must I not be devouring? must you not be devouring? must he not be devouring? must we not be devouring? must you not be devouring? must they not be devouring?
Perfect
must I not have devoured? must you not have devoured? must he not have devoured? must we not have devoured? must you not have devoured? must they not have devoured?
V-ing perfect
must I not have been devouring? must you not have been devouring? must he not have been devouring? must we not have been devouring? must you not have been devouring? must they not have been devouring?