must troop
Regular verb: troop - trooped- trooped

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must troop
you must troop
he must troop
we must troop
you must troop
they must troop 	I must be trooping
you must be trooping
he must be trooping
we must be trooping
you must be trooping
they must be trooping	I must have trooped
you must have trooped
he must have trooped
we must have trooped
you must have trooped
they must have trooped	I must have been trooping
you must have been trooping
he must have been trooping
we must have been trooping
you must have been trooping
they must have been trooping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't troop
you mustn't troop
he mustn't troop
we mustn't troop
you mustn't troop
they mustn't troop 	I mustn't be trooping
you mustn't be trooping
he mustn't be trooping
we mustn't be trooping
you mustn't be trooping
they mustn't be trooping	I mustn't have trooped
you mustn't have trooped
he mustn't have trooped
we mustn't have trooped
you mustn't have trooped
they mustn't have trooped	I mustn't have been trooping
you mustn't have been trooping
he mustn't have been trooping
we mustn't have been trooping
you mustn't have been trooping
they mustn't have been trooping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I troop?
must you troop?
must he troop?
must we troop?
must you troop?
must they troop? 	must I be trooping?
must you be trooping?
must he be trooping?
must we be trooping?
must you be trooping?
must they be trooping? 	must I have trooped?
must you have trooped?
must he have trooped?
must we have trooped?
must you have trooped?
must they have trooped? 	must I have been trooping?
must you have been trooping?
must he have been trooping?
must we have been trooping?
must you have been trooping?
must they have been trooping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I troop?
mustn't you troop?
mustn't he troop?
mustn't we troop?
mustn't you troop?
mustn't they troop? 	mustn't I be trooping?
mustn't you be trooping?
mustn't he be trooping?
mustn't we be trooping?
mustn't you be trooping?
mustn't they be trooping? 	mustn't I have trooped?
mustn't you have trooped?
mustn't he have trooped?
mustn't we have trooped?
mustn't you have trooped?
mustn't they have trooped? 	mustn't I have been trooping?
mustn't you have been trooping?
mustn't he have been trooping?
mustn't we have been trooping?
mustn't you have been trooping?
mustn't they have been trooping?