must menstruate
Regular verb: menstruate - menstruated- menstruated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must menstruate
you must menstruate
he must menstruate
we must menstruate
you must menstruate
they must menstruate 	I must be menstruating
you must be menstruating
he must be menstruating
we must be menstruating
you must be menstruating
they must be menstruating	I must have menstruated
you must have menstruated
he must have menstruated
we must have menstruated
you must have menstruated
they must have menstruated	I must have been menstruating
you must have been menstruating
he must have been menstruating
we must have been menstruating
you must have been menstruating
they must have been menstruating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not menstruate
you must not menstruate
he must not menstruate
we must not menstruate
you must not menstruate
they must not menstruate 	I must not be menstruating
you must not be menstruating
he must not be menstruating
we must not be menstruating
you must not be menstruating
they must not be menstruating	I must not have menstruated
you must not have menstruated
he must not have menstruated
we must not have menstruated
you must not have menstruated
they must not have menstruated	I must not have been menstruating
you must not have been menstruating
he must not have been menstruating
we must not have been menstruating
you must not have been menstruating
they must not have been menstruating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I menstruate?
must you menstruate?
must he menstruate?
must we menstruate?
must you menstruate?
must they menstruate? 	must I be menstruating?
must you be menstruating?
must he be menstruating?
must we be menstruating?
must you be menstruating?
must they be menstruating? 	must I have menstruated?
must you have menstruated?
must he have menstruated?
must we have menstruated?
must you have menstruated?
must they have menstruated? 	must I have been menstruating?
must you have been menstruating?
must he have been menstruating?
must we have been menstruating?
must you have been menstruating?
must they have been menstruating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not menstruate?
must you not menstruate?
must he not menstruate?
must we not menstruate?
must you not menstruate?
must they not menstruate? 	must I not be menstruating?
must you not be menstruating?
must he not be menstruating?
must we not be menstruating?
must you not be menstruating?
must they not be menstruating? 	must I not have menstruated?
must you not have menstruated?
must he not have menstruated?
must we not have menstruated?
must you not have menstruated?
must they not have menstruated? 	must I not have been menstruating?
must you not have been menstruating?
must he not have been menstruating?
must we not have been menstruating?
must you not have been menstruating?
must they not have been menstruating?