must microfilm
Regular verb: microfilm - microfilmed- microfilmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must microfilm
you must microfilm
he must microfilm
we must microfilm
you must microfilm
they must microfilm 	I must be microfilming
you must be microfilming
he must be microfilming
we must be microfilming
you must be microfilming
they must be microfilming	I must have microfilmed
you must have microfilmed
he must have microfilmed
we must have microfilmed
you must have microfilmed
they must have microfilmed	I must have been microfilming
you must have been microfilming
he must have been microfilming
we must have been microfilming
you must have been microfilming
they must have been microfilming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't microfilm
you mustn't microfilm
he mustn't microfilm
we mustn't microfilm
you mustn't microfilm
they mustn't microfilm 	I mustn't be microfilming
you mustn't be microfilming
he mustn't be microfilming
we mustn't be microfilming
you mustn't be microfilming
they mustn't be microfilming	I mustn't have microfilmed
you mustn't have microfilmed
he mustn't have microfilmed
we mustn't have microfilmed
you mustn't have microfilmed
they mustn't have microfilmed	I mustn't have been microfilming
you mustn't have been microfilming
he mustn't have been microfilming
we mustn't have been microfilming
you mustn't have been microfilming
they mustn't have been microfilming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I microfilm?
must you microfilm?
must he microfilm?
must we microfilm?
must you microfilm?
must they microfilm? 	must I be microfilming?
must you be microfilming?
must he be microfilming?
must we be microfilming?
must you be microfilming?
must they be microfilming? 	must I have microfilmed?
must you have microfilmed?
must he have microfilmed?
must we have microfilmed?
must you have microfilmed?
must they have microfilmed? 	must I have been microfilming?
must you have been microfilming?
must he have been microfilming?
must we have been microfilming?
must you have been microfilming?
must they have been microfilming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I microfilm?
mustn't you microfilm?
mustn't he microfilm?
mustn't we microfilm?
mustn't you microfilm?
mustn't they microfilm? 	mustn't I be microfilming?
mustn't you be microfilming?
mustn't he be microfilming?
mustn't we be microfilming?
mustn't you be microfilming?
mustn't they be microfilming? 	mustn't I have microfilmed?
mustn't you have microfilmed?
mustn't he have microfilmed?
mustn't we have microfilmed?
mustn't you have microfilmed?
mustn't they have microfilmed? 	mustn't I have been microfilming?
mustn't you have been microfilming?
mustn't he have been microfilming?
mustn't we have been microfilming?
mustn't you have been microfilming?
mustn't they have been microfilming?