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