must frig
Regular verb: frig - frigged- frigged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must frig
you must frig
he must frig
we must frig
you must frig
they must frig 	I must be frigging
you must be frigging
he must be frigging
we must be frigging
you must be frigging
they must be frigging	I must have frigged
you must have frigged
he 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
he 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 must not frig
you must not frig
he must not frig
we must not frig
you must not frig
they must not frig 	I must not be frigging
you must not be frigging
he must not be frigging
we must not be frigging
you must not be frigging
they must not be frigging	I must not have frigged
you must not have frigged
he must not have frigged
we must not have frigged
you must not have frigged
they must not have frigged	I must not have been frigging
you must not have been frigging
he must not have been frigging
we must not have been frigging
you must not have been frigging
they must not have been frigging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I frig?
must you frig?
must he frig?
must we frig?
must you frig?
must they frig? 	must I be frigging?
must you be frigging?
must he be frigging?
must we be frigging?
must you be frigging?
must they be frigging? 	must I have frigged?
must you have frigged?
must he 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 he 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 	
must I not frig?
must you not frig?
must he not frig?
must we not frig?
must you not frig?
must they not frig? 	must I not be frigging?
must you not be frigging?
must he not be frigging?
must we not be frigging?
must you not be frigging?
must they not be frigging? 	must I not have frigged?
must you not have frigged?
must he not have frigged?
must we not have frigged?
must you not have frigged?
must they not have frigged? 	must I not have been frigging?
must you not have been frigging?
must he not have been frigging?
must we not have been frigging?
must you not have been frigging?
must they not have been frigging?