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