must louse
Regular verb: louse - loused- loused

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must louse
you must louse
she must louse
we must louse
you must louse
they must louse 	I must be lousing
you must be lousing
she must be lousing
we must be lousing
you must be lousing
they must be lousing	I must have loused
you must have loused
she 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
she 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 mustn't louse
you mustn't louse
she mustn't louse
we mustn't louse
you mustn't louse
they mustn't louse 	I mustn't be lousing
you mustn't be lousing
she mustn't be lousing
we mustn't be lousing
you mustn't be lousing
they mustn't be lousing	I mustn't have loused
you mustn't have loused
she mustn't have loused
we mustn't have loused
you mustn't have loused
they mustn't have loused	I mustn't have been lousing
you mustn't have been lousing
she mustn't have been lousing
we mustn't have been lousing
you mustn't have been lousing
they mustn't have been lousing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I louse?
must you louse?
must she louse?
must we louse?
must you louse?
must they louse? 	must I be lousing?
must you be lousing?
must she be lousing?
must we be lousing?
must you be lousing?
must they be lousing? 	must I have loused?
must you have loused?
must she 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 she 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 	
mustn't I louse?
mustn't you louse?
mustn't she louse?
mustn't we louse?
mustn't you louse?
mustn't they louse? 	mustn't I be lousing?
mustn't you be lousing?
mustn't she be lousing?
mustn't we be lousing?
mustn't you be lousing?
mustn't they be lousing? 	mustn't I have loused?
mustn't you have loused?
mustn't she have loused?
mustn't we have loused?
mustn't you have loused?
mustn't they have loused? 	mustn't I have been lousing?
mustn't you have been lousing?
mustn't she have been lousing?
mustn't we have been lousing?
mustn't you have been lousing?
mustn't they have been lousing?