must truss
Regular verb: truss - trussed- trussed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must truss
you must truss
he must truss
we must truss
you must truss
they must truss 	I must be trussing
you must be trussing
he must be trussing
we must be trussing
you must be trussing
they must be trussing	I must have trussed
you must have trussed
he must have trussed
we must have trussed
you must have trussed
they must have trussed	I must have been trussing
you must have been trussing
he must have been trussing
we must have been trussing
you must have been trussing
they must have been trussing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't truss
you mustn't truss
he mustn't truss
we mustn't truss
you mustn't truss
they mustn't truss 	I mustn't be trussing
you mustn't be trussing
he mustn't be trussing
we mustn't be trussing
you mustn't be trussing
they mustn't be trussing	I mustn't have trussed
you mustn't have trussed
he mustn't have trussed
we mustn't have trussed
you mustn't have trussed
they mustn't have trussed	I mustn't have been trussing
you mustn't have been trussing
he mustn't have been trussing
we mustn't have been trussing
you mustn't have been trussing
they mustn't have been trussing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I truss?
must you truss?
must he truss?
must we truss?
must you truss?
must they truss? 	must I be trussing?
must you be trussing?
must he be trussing?
must we be trussing?
must you be trussing?
must they be trussing? 	must I have trussed?
must you have trussed?
must he have trussed?
must we have trussed?
must you have trussed?
must they have trussed? 	must I have been trussing?
must you have been trussing?
must he have been trussing?
must we have been trussing?
must you have been trussing?
must they have been trussing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I truss?
mustn't you truss?
mustn't he truss?
mustn't we truss?
mustn't you truss?
mustn't they truss? 	mustn't I be trussing?
mustn't you be trussing?
mustn't he be trussing?
mustn't we be trussing?
mustn't you be trussing?
mustn't they be trussing? 	mustn't I have trussed?
mustn't you have trussed?
mustn't he have trussed?
mustn't we have trussed?
mustn't you have trussed?
mustn't they have trussed? 	mustn't I have been trussing?
mustn't you have been trussing?
mustn't he have been trussing?
mustn't we have been trussing?
mustn't you have been trussing?
mustn't they have been trussing?