must trace
Regular verb: trace - traced- traced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must trace
you must trace
she must trace
we must trace
you must trace
they must trace 	I must be tracing
you must be tracing
she must be tracing
we must be tracing
you must be tracing
they must be tracing	I must have traced
you must have traced
she 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
she 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 must not trace
you must not trace
she must not trace
we must not trace
you must not trace
they must not trace 	I must not be tracing
you must not be tracing
she must not be tracing
we must not be tracing
you must not be tracing
they must not be tracing	I must not have traced
you must not have traced
she must not have traced
we must not have traced
you must not have traced
they must not have traced	I must not have been tracing
you must not have been tracing
she must not have been tracing
we must not have been tracing
you must not have been tracing
they must not have been tracing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I trace?
must you trace?
must she trace?
must we trace?
must you trace?
must they trace? 	must I be tracing?
must you be tracing?
must she be tracing?
must we be tracing?
must you be tracing?
must they be tracing? 	must I have traced?
must you have traced?
must she 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 she 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 	
must I not trace?
must you not trace?
must she not trace?
must we not trace?
must you not trace?
must they not trace? 	must I not be tracing?
must you not be tracing?
must she not be tracing?
must we not be tracing?
must you not be tracing?
must they not be tracing? 	must I not have traced?
must you not have traced?
must she not have traced?
must we not have traced?
must you not have traced?
must they not have traced? 	must I not have been tracing?
must you not have been tracing?
must she not have been tracing?
must we not have been tracing?
must you not have been tracing?
must they not have been tracing?