English verb conjugation
MUST MUG

Regular verb: mug - mugged - mugged

Affirmation

Simple form	V-ing form
I must mug you must mug he must mug we must mug you must mug they must mug	I must be mugging you must be mugging he must be mugging we must be mugging you must be mugging they must be mugging
Perfect	V-ing perfect
I must have mugged you must have mugged he must have mugged we must have mugged you must have mugged they must have mugged	I must have been mugging you must have been mugging he must have been mugging we must have been mugging you must have been mugging they must have been mugging

Negation

Simple form	V-ing form
I mustn't mug you mustn't mug he mustn't mug we mustn't mug you mustn't mug they mustn't mug	I mustn't be mugging you mustn't be mugging he mustn't be mugging we mustn't be mugging you mustn't be mugging they mustn't be mugging
Perfect	V-ing perfect
I mustn't have mugged you mustn't have mugged he mustn't have mugged we mustn't have mugged you mustn't have mugged they mustn't have mugged	I mustn't have been mugging you mustn't have been mugging he mustn't have been mugging we mustn't have been mugging you mustn't have been mugging they mustn't have been mugging

Interrogative form

Simple form	V-ing form
must I mug? must you mug? must he mug? must we mug? must you mug? must they mug?	must I be mugging? must you be mugging? must he be mugging? must we be mugging? must you be mugging? must they be mugging?
Perfect	V-ing perfect
must I have mugged? must you have mugged? must he have mugged? must we have mugged? must you have mugged? must they have mugged?	must I have been mugging? must you have been mugging? must he have been mugging? must we have been mugging? must you have been mugging? must they have been mugging?

Interro-negative form

Simple form	V-ing form
mustn't I mug? mustn't you mug? mustn't he mug? mustn't we mug? mustn't you mug? mustn't they mug?	mustn't I be mugging? mustn't you be mugging? mustn't he be mugging? mustn't we be mugging? mustn't you be mugging? mustn't they be mugging?
Perfect	V-ing perfect
mustn't I have mugged? mustn't you have mugged? mustn't he have mugged? mustn't we have mugged? mustn't you have mugged? mustn't they have mugged?	mustn't I have been mugging? mustn't you have been mugging? mustn't he have been mugging? mustn't we have been mugging? mustn't you have been mugging? mustn't they have been mugging?