English verb conjugation
MUST SKIRT

Regular verb: skirt - skirted - skirted

Affirmation

Simple form	V-ing form
I must skirt you must skirt he must skirt we must skirt you must skirt they must skirt	I must be skirting you must be skirting he must be skirting we must be skirting you must be skirting they must be skirting
Perfect	V-ing perfect
I must have skirted you must have skirted he must have skirted we must have skirted you must have skirted they must have skirted	I must have been skirting you must have been skirting he must have been skirting we must have been skirting you must have been skirting they must have been skirting

Negation

Simple form	V-ing form
I mustn't skirt you mustn't skirt he mustn't skirt we mustn't skirt you mustn't skirt they mustn't skirt	I mustn't be skirting you mustn't be skirting he mustn't be skirting we mustn't be skirting you mustn't be skirting they mustn't be skirting
Perfect	V-ing perfect
I mustn't have skirted you mustn't have skirted he mustn't have skirted we mustn't have skirted you mustn't have skirted they mustn't have skirted	I mustn't have been skirting you mustn't have been skirting he mustn't have been skirting we mustn't have been skirting you mustn't have been skirting they mustn't have been skirting

Interrogative form

Simple form	V-ing form
must I skirt? must you skirt? must he skirt? must we skirt? must you skirt? must they skirt?	must I be skirting? must you be skirting? must he be skirting? must we be skirting? must you be skirting? must they be skirting?
Perfect	V-ing perfect
must I have skirted? must you have skirted? must he have skirted? must we have skirted? must you have skirted? must they have skirted?	must I have been skirting? must you have been skirting? must he have been skirting? must we have been skirting? must you have been skirting? must they have been skirting?

Interro-negative form

Simple form	V-ing form
mustn't I skirt? mustn't you skirt? mustn't he skirt? mustn't we skirt? mustn't you skirt? mustn't they skirt?	mustn't I be skirting? mustn't you be skirting? mustn't he be skirting? mustn't we be skirting? mustn't you be skirting? mustn't they be skirting?
Perfect	V-ing perfect
mustn't I have skirted? mustn't you have skirted? mustn't he have skirted? mustn't we have skirted? mustn't you have skirted? mustn't they have skirted?	mustn't I have been skirting? mustn't you have been skirting? mustn't he have been skirting? mustn't we have been skirting? mustn't you have been skirting? mustn't they have been skirting?