must frig
Regular verb: frig - frigged- frigged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must frig
you must frig
she must frig
we must frig
you must frig
they must frig 	I must be frigging
you must be frigging
she must be frigging
we must be frigging
you must be frigging
they must be frigging	I must have frigged
you must have frigged
she must have frigged
we must have frigged
you must have frigged
they must have frigged	I must have been frigging
you must have been frigging
she must have been frigging
we must have been frigging
you must have been frigging
they must have been frigging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't frig
you mustn't frig
she mustn't frig
we mustn't frig
you mustn't frig
they mustn't frig 	I mustn't be frigging
you mustn't be frigging
she mustn't be frigging
we mustn't be frigging
you mustn't be frigging
they mustn't be frigging	I mustn't have frigged
you mustn't have frigged
she mustn't have frigged
we mustn't have frigged
you mustn't have frigged
they mustn't have frigged	I mustn't have been frigging
you mustn't have been frigging
she mustn't have been frigging
we mustn't have been frigging
you mustn't have been frigging
they mustn't have been frigging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I frig?
must you frig?
must she frig?
must we frig?
must you frig?
must they frig? 	must I be frigging?
must you be frigging?
must she be frigging?
must we be frigging?
must you be frigging?
must they be frigging? 	must I have frigged?
must you have frigged?
must she have frigged?
must we have frigged?
must you have frigged?
must they have frigged? 	must I have been frigging?
must you have been frigging?
must she have been frigging?
must we have been frigging?
must you have been frigging?
must they have been frigging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I frig?
mustn't you frig?
mustn't she frig?
mustn't we frig?
mustn't you frig?
mustn't they frig? 	mustn't I be frigging?
mustn't you be frigging?
mustn't she be frigging?
mustn't we be frigging?
mustn't you be frigging?
mustn't they be frigging? 	mustn't I have frigged?
mustn't you have frigged?
mustn't she have frigged?
mustn't we have frigged?
mustn't you have frigged?
mustn't they have frigged? 	mustn't I have been frigging?
mustn't you have been frigging?
mustn't she have been frigging?
mustn't we have been frigging?
mustn't you have been frigging?
mustn't they have been frigging?