must loose
Regular verb: loose - loosed- loosed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must loose
you must loose
he must loose
we must loose
you must loose
they must loose 	I must be loosing
you must be loosing
he must be loosing
we must be loosing
you must be loosing
they must be loosing	I must have loosed
you must have loosed
he must have loosed
we must have loosed
you must have loosed
they must have loosed	I must have been loosing
you must have been loosing
he must have been loosing
we must have been loosing
you must have been loosing
they must have been loosing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't loose
you mustn't loose
he mustn't loose
we mustn't loose
you mustn't loose
they mustn't loose 	I mustn't be loosing
you mustn't be loosing
he mustn't be loosing
we mustn't be loosing
you mustn't be loosing
they mustn't be loosing	I mustn't have loosed
you mustn't have loosed
he mustn't have loosed
we mustn't have loosed
you mustn't have loosed
they mustn't have loosed	I mustn't have been loosing
you mustn't have been loosing
he mustn't have been loosing
we mustn't have been loosing
you mustn't have been loosing
they mustn't have been loosing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I loose?
must you loose?
must he loose?
must we loose?
must you loose?
must they loose? 	must I be loosing?
must you be loosing?
must he be loosing?
must we be loosing?
must you be loosing?
must they be loosing? 	must I have loosed?
must you have loosed?
must he have loosed?
must we have loosed?
must you have loosed?
must they have loosed? 	must I have been loosing?
must you have been loosing?
must he have been loosing?
must we have been loosing?
must you have been loosing?
must they have been loosing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I loose?
mustn't you loose?
mustn't he loose?
mustn't we loose?
mustn't you loose?
mustn't they loose? 	mustn't I be loosing?
mustn't you be loosing?
mustn't he be loosing?
mustn't we be loosing?
mustn't you be loosing?
mustn't they be loosing? 	mustn't I have loosed?
mustn't you have loosed?
mustn't he have loosed?
mustn't we have loosed?
mustn't you have loosed?
mustn't they have loosed? 	mustn't I have been loosing?
mustn't you have been loosing?
mustn't he have been loosing?
mustn't we have been loosing?
mustn't you have been loosing?
mustn't they have been loosing?