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