must unlace
Verbo regular: unlace - unlaced- unlaced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must unlace
you must unlace
she must unlace
we must unlace
you must unlace
they must unlace 	I must be unlacing
you must be unlacing
she must be unlacing
we must be unlacing
you must be unlacing
they must be unlacing	I must have unlaced
you must have unlaced
she 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
she must have been unlacing
we must have been unlacing
you must have been unlacing
they must have been unlacing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not unlace
you must not unlace
she 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
she must not be unlacing
we must not be unlacing
you must not be unlacing
they must not be unlacing	I must not have unlaced
you must not have unlaced
she 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
she must not have been unlacing
we must not have been unlacing
you must not have been unlacing
they must not have been unlacing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I unlace?
must you unlace?
must she unlace?
must we unlace?
must you unlace?
must they unlace? 	must I be unlacing?
must you be unlacing?
must she be unlacing?
must we be unlacing?
must you be unlacing?
must they be unlacing? 	must I have unlaced?
must you have unlaced?
must she 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 she have been unlacing?
must we have been unlacing?
must you have been unlacing?
must they have been unlacing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not unlace?
must you not unlace?
must she 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 she not be unlacing?
must we not be unlacing?
must you not be unlacing?
must they not be unlacing? 	must I not have unlaced?
must you not have unlaced?
must she 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 she not have been unlacing?
must we not have been unlacing?
must you not have been unlacing?
must they not have been unlacing?