English verb conjugation
MUST GAG

Regular verb: gag - gagged - gagged

Affirmation

Simple form	V-ing form
I must gag you must gag she must gag we must gag you must gag they must gag	I must be gagging you must be gagging she must be gagging we must be gagging you must be gagging they must be gagging
Perfect	V-ing perfect
I must have gagged you must have gagged she must have gagged we must have gagged you must have gagged they must have gagged	I must have been gagging you must have been gagging she must have been gagging we must have been gagging you must have been gagging they must have been gagging

Negation

Simple form	V-ing form
I mustn't gag you mustn't gag she mustn't gag we mustn't gag you mustn't gag they mustn't gag	I mustn't be gagging you mustn't be gagging she mustn't be gagging we mustn't be gagging you mustn't be gagging they mustn't be gagging
Perfect	V-ing perfect
I mustn't have gagged you mustn't have gagged she mustn't have gagged we mustn't have gagged you mustn't have gagged they mustn't have gagged	I mustn't have been gagging you mustn't have been gagging she mustn't have been gagging we mustn't have been gagging you mustn't have been gagging they mustn't have been gagging

Interrogative form

Simple form	V-ing form
must I gag? must you gag? must she gag? must we gag? must you gag? must they gag?	must I be gagging? must you be gagging? must she be gagging? must we be gagging? must you be gagging? must they be gagging?
Perfect	V-ing perfect
must I have gagged? must you have gagged? must she have gagged? must we have gagged? must you have gagged? must they have gagged?	must I have been gagging? must you have been gagging? must she have been gagging? must we have been gagging? must you have been gagging? must they have been gagging?

Interro-negative form

Simple form	V-ing form
mustn't I gag? mustn't you gag? mustn't she gag? mustn't we gag? mustn't you gag? mustn't they gag?	mustn't I be gagging? mustn't you be gagging? mustn't she be gagging? mustn't we be gagging? mustn't you be gagging? mustn't they be gagging?
Perfect	V-ing perfect
mustn't I have gagged? mustn't you have gagged? mustn't she have gagged? mustn't we have gagged? mustn't you have gagged? mustn't they have gagged?	mustn't I have been gagging? mustn't you have been gagging? mustn't she have been gagging? mustn't we have been gagging? mustn't you have been gagging? mustn't they have been gagging?