English verb conjugation
MUST DARN

Regular verb: darn - darned - darned

Affirmation

Simple form	V-ing form
I must darn you must darn she must darn we must darn you must darn they must darn	I must be darning you must be darning she must be darning we must be darning you must be darning they must be darning
Perfect	V-ing perfect
I must have darned you must have darned she must have darned we must have darned you must have darned they must have darned	I must have been darning you must have been darning she must have been darning we must have been darning you must have been darning they must have been darning

Negation

Simple form	V-ing form
I mustn't darn you mustn't darn she mustn't darn we mustn't darn you mustn't darn they mustn't darn	I mustn't be darning you mustn't be darning she mustn't be darning we mustn't be darning you mustn't be darning they mustn't be darning
Perfect	V-ing perfect
I mustn't have darned you mustn't have darned she mustn't have darned we mustn't have darned you mustn't have darned they mustn't have darned	I mustn't have been darning you mustn't have been darning she mustn't have been darning we mustn't have been darning you mustn't have been darning they mustn't have been darning

Interrogative form

Simple form	V-ing form
must I darn? must you darn? must she darn? must we darn? must you darn? must they darn?	must I be darning? must you be darning? must she be darning? must we be darning? must you be darning? must they be darning?
Perfect	V-ing perfect
must I have darned? must you have darned? must she have darned? must we have darned? must you have darned? must they have darned?	must I have been darning? must you have been darning? must she have been darning? must we have been darning? must you have been darning? must they have been darning?

Interro-negative form

Simple form	V-ing form
mustn't I darn? mustn't you darn? mustn't she darn? mustn't we darn? mustn't you darn? mustn't they darn?	mustn't I be darning? mustn't you be darning? mustn't she be darning? mustn't we be darning? mustn't you be darning? mustn't they be darning?
Perfect	V-ing perfect
mustn't I have darned? mustn't you have darned? mustn't she have darned? mustn't we have darned? mustn't you have darned? mustn't they have darned?	mustn't I have been darning? mustn't you have been darning? mustn't she have been darning? mustn't we have been darning? mustn't you have been darning? mustn't they have been darning?