must cross-refer
Regular verb: cross-refer - cross-refered- cross-refered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must cross-refer
you must cross-refer
he must cross-refer
we must cross-refer
you must cross-refer
they must cross-refer 	I must be cross-refering
you must be cross-refering
he must be cross-refering
we must be cross-refering
you must be cross-refering
they must be cross-refering	I must have cross-refered
you must have cross-refered
he must have cross-refered
we must have cross-refered
you must have cross-refered
they must have cross-refered	I must have been cross-refering
you must have been cross-refering
he must have been cross-refering
we must have been cross-refering
you must have been cross-refering
they must have been cross-refering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not cross-refer
you must not cross-refer
he must not cross-refer
we must not cross-refer
you must not cross-refer
they must not cross-refer 	I must not be cross-refering
you must not be cross-refering
he must not be cross-refering
we must not be cross-refering
you must not be cross-refering
they must not be cross-refering	I must not have cross-refered
you must not have cross-refered
he must not have cross-refered
we must not have cross-refered
you must not have cross-refered
they must not have cross-refered	I must not have been cross-refering
you must not have been cross-refering
he must not have been cross-refering
we must not have been cross-refering
you must not have been cross-refering
they must not have been cross-refering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I cross-refer?
must you cross-refer?
must he cross-refer?
must we cross-refer?
must you cross-refer?
must they cross-refer? 	must I be cross-refering?
must you be cross-refering?
must he be cross-refering?
must we be cross-refering?
must you be cross-refering?
must they be cross-refering? 	must I have cross-refered?
must you have cross-refered?
must he have cross-refered?
must we have cross-refered?
must you have cross-refered?
must they have cross-refered? 	must I have been cross-refering?
must you have been cross-refering?
must he have been cross-refering?
must we have been cross-refering?
must you have been cross-refering?
must they have been cross-refering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not cross-refer?
must you not cross-refer?
must he not cross-refer?
must we not cross-refer?
must you not cross-refer?
must they not cross-refer? 	must I not be cross-refering?
must you not be cross-refering?
must he not be cross-refering?
must we not be cross-refering?
must you not be cross-refering?
must they not be cross-refering? 	must I not have cross-refered?
must you not have cross-refered?
must he not have cross-refered?
must we not have cross-refered?
must you not have cross-refered?
must they not have cross-refered? 	must I not have been cross-refering?
must you not have been cross-refering?
must he not have been cross-refering?
must we not have been cross-refering?
must you not have been cross-refering?
must they not have been cross-refering?