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 must not unlace you must not unlace he must not unlace we must not unlace you must not unlace they must not unlace	I must not be unlacing you must not be unlacing he must not be unlacing we must not be unlacing you must not be unlacing they must not be unlacing
Perfect	V-ing perfect
I must not have unlaced you must not have unlaced he must not have unlaced we must not have unlaced you must not have unlaced they must not have unlaced	I must not have been unlacing you must not have been unlacing he must not have been unlacing we must not have been unlacing you must not have been unlacing they must not 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
must I not unlace? must you not unlace? must he not unlace? must we not unlace? must you not unlace? must they not unlace?	must I not be unlacing? must you not be unlacing? must he not be unlacing? must we not be unlacing? must you not be unlacing? must they not be unlacing?
Perfect	V-ing perfect
must I not have unlaced? must you not have unlaced? must he not have unlaced? must we not have unlaced? must you not have unlaced? must they not have unlaced?	must I not have been unlacing? must you not have been unlacing? must he not have been unlacing? must we not have been unlacing? must you not have been unlacing? must they not have been unlacing?