must freshen
Regular verb: freshen - freshened- freshened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must freshen
you must freshen
she must freshen
we must freshen
you must freshen
they must freshen 	I must be freshening
you must be freshening
she must be freshening
we must be freshening
you must be freshening
they must be freshening	I must have freshened
you must have freshened
she must have freshened
we must have freshened
you must have freshened
they must have freshened	I must have been freshening
you must have been freshening
she must have been freshening
we must have been freshening
you must have been freshening
they must have been freshening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't freshen
you mustn't freshen
she mustn't freshen
we mustn't freshen
you mustn't freshen
they mustn't freshen 	I mustn't be freshening
you mustn't be freshening
she mustn't be freshening
we mustn't be freshening
you mustn't be freshening
they mustn't be freshening	I mustn't have freshened
you mustn't have freshened
she mustn't have freshened
we mustn't have freshened
you mustn't have freshened
they mustn't have freshened	I mustn't have been freshening
you mustn't have been freshening
she mustn't have been freshening
we mustn't have been freshening
you mustn't have been freshening
they mustn't have been freshening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I freshen?
must you freshen?
must she freshen?
must we freshen?
must you freshen?
must they freshen? 	must I be freshening?
must you be freshening?
must she be freshening?
must we be freshening?
must you be freshening?
must they be freshening? 	must I have freshened?
must you have freshened?
must she have freshened?
must we have freshened?
must you have freshened?
must they have freshened? 	must I have been freshening?
must you have been freshening?
must she have been freshening?
must we have been freshening?
must you have been freshening?
must they have been freshening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I freshen?
mustn't you freshen?
mustn't she freshen?
mustn't we freshen?
mustn't you freshen?
mustn't they freshen? 	mustn't I be freshening?
mustn't you be freshening?
mustn't she be freshening?
mustn't we be freshening?
mustn't you be freshening?
mustn't they be freshening? 	mustn't I have freshened?
mustn't you have freshened?
mustn't she have freshened?
mustn't we have freshened?
mustn't you have freshened?
mustn't they have freshened? 	mustn't I have been freshening?
mustn't you have been freshening?
mustn't she have been freshening?
mustn't we have been freshening?
mustn't you have been freshening?
mustn't they have been freshening?