must trace
Regular verb: trace - traced- traced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must trace
you must trace
he must trace
we must trace
you must trace
they must trace 	I must be tracing
you must be tracing
he must be tracing
we must be tracing
you must be tracing
they must be tracing	I must have traced
you must have traced
he must have traced
we must have traced
you must have traced
they must have traced	I must have been tracing
you must have been tracing
he must have been tracing
we must have been tracing
you must have been tracing
they must have been tracing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't trace
you mustn't trace
he mustn't trace
we mustn't trace
you mustn't trace
they mustn't trace 	I mustn't be tracing
you mustn't be tracing
he mustn't be tracing
we mustn't be tracing
you mustn't be tracing
they mustn't be tracing	I mustn't have traced
you mustn't have traced
he mustn't have traced
we mustn't have traced
you mustn't have traced
they mustn't have traced	I mustn't have been tracing
you mustn't have been tracing
he mustn't have been tracing
we mustn't have been tracing
you mustn't have been tracing
they mustn't have been tracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I trace?
must you trace?
must he trace?
must we trace?
must you trace?
must they trace? 	must I be tracing?
must you be tracing?
must he be tracing?
must we be tracing?
must you be tracing?
must they be tracing? 	must I have traced?
must you have traced?
must he have traced?
must we have traced?
must you have traced?
must they have traced? 	must I have been tracing?
must you have been tracing?
must he have been tracing?
must we have been tracing?
must you have been tracing?
must they have been tracing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I trace?
mustn't you trace?
mustn't he trace?
mustn't we trace?
mustn't you trace?
mustn't they trace? 	mustn't I be tracing?
mustn't you be tracing?
mustn't he be tracing?
mustn't we be tracing?
mustn't you be tracing?
mustn't they be tracing? 	mustn't I have traced?
mustn't you have traced?
mustn't he have traced?
mustn't we have traced?
mustn't you have traced?
mustn't they have traced? 	mustn't I have been tracing?
mustn't you have been tracing?
mustn't he have been tracing?
mustn't we have been tracing?
mustn't you have been tracing?
mustn't they have been tracing?