must lace
Verbo regular: lace - laced- laced

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must lace
you must lace
he must lace
we must lace
you must lace
they must lace 	I must be lacing
you must be lacing
he must be lacing
we must be lacing
you must be lacing
they must be lacing	I must have laced
you must have laced
he must have laced
we must have laced
you must have laced
they must have laced	I must have been lacing
you must have been lacing
he must have been lacing
we must have been lacing
you must have been lacing
they must have been lacing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not lace
you must not lace
he must not lace
we must not lace
you must not lace
they must not lace 	I must not be lacing
you must not be lacing
he must not be lacing
we must not be lacing
you must not be lacing
they must not be lacing	I must not have laced
you must not have laced
he must not have laced
we must not have laced
you must not have laced
they must not have laced	I must not have been lacing
you must not have been lacing
he must not have been lacing
we must not have been lacing
you must not have been lacing
they must not have been lacing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I lace?
must you lace?
must he lace?
must we lace?
must you lace?
must they lace? 	must I be lacing?
must you be lacing?
must he be lacing?
must we be lacing?
must you be lacing?
must they be lacing? 	must I have laced?
must you have laced?
must he have laced?
must we have laced?
must you have laced?
must they have laced? 	must I have been lacing?
must you have been lacing?
must he have been lacing?
must we have been lacing?
must you have been lacing?
must they have been lacing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not lace?
must you not lace?
must he not lace?
must we not lace?
must you not lace?
must they not lace? 	must I not be lacing?
must you not be lacing?
must he not be lacing?
must we not be lacing?
must you not be lacing?
must they not be lacing? 	must I not have laced?
must you not have laced?
must he not have laced?
must we not have laced?
must you not have laced?
must they not have laced? 	must I not have been lacing?
must you not have been lacing?
must he not have been lacing?
must we not have been lacing?
must you not have been lacing?
must they not have been lacing?