English verb conjugation
MUST UNLACE

Regular verb: unlace - unlaced - unlaced

Affirmation

Simple form	V-ing form
I must unlace you must unlace he must unlace we must unlace you must unlace they must unlace	I must be unlacing you must be unlacing he must be unlacing we must be unlacing you must be unlacing they must be unlacing
Perfect	V-ing perfect
I must have unlaced you must have unlaced he must have unlaced we must have unlaced you must have unlaced they must have unlaced	I must have been unlacing you must have been unlacing he must have been unlacing we must have been unlacing you must have been unlacing they must have been unlacing

Negation

Simple form	V-ing form
I mustn't unlace you mustn't unlace he mustn't unlace we mustn't unlace you mustn't unlace they mustn't unlace	I mustn't be unlacing you mustn't be unlacing he mustn't be unlacing we mustn't be unlacing you mustn't be unlacing they mustn't be unlacing
Perfect	V-ing perfect
I mustn't have unlaced you mustn't have unlaced he mustn't have unlaced we mustn't have unlaced you mustn't have unlaced they mustn't have unlaced	I mustn't have been unlacing you mustn't have been unlacing he mustn't have been unlacing we mustn't have been unlacing you mustn't have been unlacing they mustn't have been unlacing

Interrogative form

Simple form	V-ing form
must I unlace? must you unlace? must he unlace? must we unlace? must you unlace? must they unlace?	must I be unlacing? must you be unlacing? must he be unlacing? must we be unlacing? must you be unlacing? must they be unlacing?
Perfect	V-ing perfect
must I have unlaced? must you have unlaced? must he have unlaced? must we have unlaced? must you have unlaced? must they have unlaced?	must I have been unlacing? must you have been unlacing? must he have been unlacing? must we have been unlacing? must you have been unlacing? must they have been unlacing?

Interro-negative form

Simple form	V-ing form
mustn't I unlace? mustn't you unlace? mustn't he unlace? mustn't we unlace? mustn't you unlace? mustn't they unlace?	mustn't I be unlacing? mustn't you be unlacing? mustn't he be unlacing? mustn't we be unlacing? mustn't you be unlacing? mustn't they be unlacing?
Perfect	V-ing perfect
mustn't I have unlaced? mustn't you have unlaced? mustn't he have unlaced? mustn't we have unlaced? mustn't you have unlaced? mustn't they have unlaced?	mustn't I have been unlacing? mustn't you have been unlacing? mustn't he have been unlacing? mustn't we have been unlacing? mustn't you have been unlacing? mustn't they have been unlacing?