I must relieve you must relieve he must relieve we must relieve you must relieve they must relieve
V-ing form
I must be relieving you must be relieving he must be relieving we must be relieving you must be relieving they must be relieving
Perfect
I must have relieved you must have relieved he must have relieved we must have relieved you must have relieved they must have relieved
V-ing perfect
I must have been relieving you must have been relieving he must have been relieving we must have been relieving you must have been relieving they must have been relieving
Negation
Simple form
I mustn't relieve you mustn't relieve he mustn't relieve we mustn't relieve you mustn't relieve they mustn't relieve
V-ing form
I mustn't be relieving you mustn't be relieving he mustn't be relieving we mustn't be relieving you mustn't be relieving they mustn't be relieving
Perfect
I mustn't have relieved you mustn't have relieved he mustn't have relieved we mustn't have relieved you mustn't have relieved they mustn't have relieved
V-ing perfect
I mustn't have been relieving you mustn't have been relieving he mustn't have been relieving we mustn't have been relieving you mustn't have been relieving they mustn't have been relieving
Interrogative form
Simple form
must I relieve? must you relieve? must he relieve? must we relieve? must you relieve? must they relieve?
V-ing form
must I be relieving? must you be relieving? must he be relieving? must we be relieving? must you be relieving? must they be relieving?
Perfect
must I have relieved? must you have relieved? must he have relieved? must we have relieved? must you have relieved? must they have relieved?
V-ing perfect
must I have been relieving? must you have been relieving? must he have been relieving? must we have been relieving? must you have been relieving? must they have been relieving?
Interro-negative form
Simple form
mustn't I relieve? mustn't you relieve? mustn't he relieve? mustn't we relieve? mustn't you relieve? mustn't they relieve?
V-ing form
mustn't I be relieving? mustn't you be relieving? mustn't he be relieving? mustn't we be relieving? mustn't you be relieving? mustn't they be relieving?
Perfect
mustn't I have relieved? mustn't you have relieved? mustn't he have relieved? mustn't we have relieved? mustn't you have relieved? mustn't they have relieved?
V-ing perfect
mustn't I have been relieving? mustn't you have been relieving? mustn't he have been relieving? mustn't we have been relieving? mustn't you have been relieving? mustn't they have been relieving?