English verb conjugation
MUST FRIG

Regular verb: frig - frigged - frigged

Affirmation

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