must louse
Regular verb: louse - loused- loused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must louse
you must louse
he must louse
we must louse
you must louse
they must louse 	I must be lousing
you must be lousing
he must be lousing
we must be lousing
you must be lousing
they must be lousing	I must have loused
you must have loused
he must have loused
we must have loused
you must have loused
they must have loused	I must have been lousing
you must have been lousing
he must have been lousing
we must have been lousing
you must have been lousing
they must have been lousing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not louse
you must not louse
he must not louse
we must not louse
you must not louse
they must not louse 	I must not be lousing
you must not be lousing
he must not be lousing
we must not be lousing
you must not be lousing
they must not be lousing	I must not have loused
you must not have loused
he must not have loused
we must not have loused
you must not have loused
they must not have loused	I must not have been lousing
you must not have been lousing
he must not have been lousing
we must not have been lousing
you must not have been lousing
they must not have been lousing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I louse?
must you louse?
must he louse?
must we louse?
must you louse?
must they louse? 	must I be lousing?
must you be lousing?
must he be lousing?
must we be lousing?
must you be lousing?
must they be lousing? 	must I have loused?
must you have loused?
must he have loused?
must we have loused?
must you have loused?
must they have loused? 	must I have been lousing?
must you have been lousing?
must he have been lousing?
must we have been lousing?
must you have been lousing?
must they have been lousing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not louse?
must you not louse?
must he not louse?
must we not louse?
must you not louse?
must they not louse? 	must I not be lousing?
must you not be lousing?
must he not be lousing?
must we not be lousing?
must you not be lousing?
must they not be lousing? 	must I not have loused?
must you not have loused?
must he not have loused?
must we not have loused?
must you not have loused?
must they not have loused? 	must I not have been lousing?
must you not have been lousing?
must he not have been lousing?
must we not have been lousing?
must you not have been lousing?
must they not have been lousing?