English verb conjugation
MUST FAG

Regular verb: fag - fagged - fagged

Affirmation

Simple form	V-ing form
I must fag you must fag he must fag we must fag you must fag they must fag	I must be fagging you must be fagging he must be fagging we must be fagging you must be fagging they must be fagging
Perfect	V-ing perfect
I must have fagged you must have fagged he must have fagged we must have fagged you must have fagged they must have fagged	I must have been fagging you must have been fagging he must have been fagging we must have been fagging you must have been fagging they must have been fagging

Negation

Simple form	V-ing form
I mustn't fag you mustn't fag he mustn't fag we mustn't fag you mustn't fag they mustn't fag	I mustn't be fagging you mustn't be fagging he mustn't be fagging we mustn't be fagging you mustn't be fagging they mustn't be fagging
Perfect	V-ing perfect
I mustn't have fagged you mustn't have fagged he mustn't have fagged we mustn't have fagged you mustn't have fagged they mustn't have fagged	I mustn't have been fagging you mustn't have been fagging he mustn't have been fagging we mustn't have been fagging you mustn't have been fagging they mustn't have been fagging

Interrogative form

Simple form	V-ing form
must I fag? must you fag? must he fag? must we fag? must you fag? must they fag?	must I be fagging? must you be fagging? must he be fagging? must we be fagging? must you be fagging? must they be fagging?
Perfect	V-ing perfect
must I have fagged? must you have fagged? must he have fagged? must we have fagged? must you have fagged? must they have fagged?	must I have been fagging? must you have been fagging? must he have been fagging? must we have been fagging? must you have been fagging? must they have been fagging?

Interro-negative form

Simple form	V-ing form
mustn't I fag? mustn't you fag? mustn't he fag? mustn't we fag? mustn't you fag? mustn't they fag?	mustn't I be fagging? mustn't you be fagging? mustn't he be fagging? mustn't we be fagging? mustn't you be fagging? mustn't they be fagging?
Perfect	V-ing perfect
mustn't I have fagged? mustn't you have fagged? mustn't he have fagged? mustn't we have fagged? mustn't you have fagged? mustn't they have fagged?	mustn't I have been fagging? mustn't you have been fagging? mustn't he have been fagging? mustn't we have been fagging? mustn't you have been fagging? mustn't they have been fagging?