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