must luster
Verbo regular: luster - lustered- lustered

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must luster
you must luster
he must luster
we must luster
you must luster
they must luster 	I must be lustering
you must be lustering
he must be lustering
we must be lustering
you must be lustering
they must be lustering	I must have lustered
you must have lustered
he must have lustered
we must have lustered
you must have lustered
they must have lustered	I must have been lustering
you must have been lustering
he must have been lustering
we must have been lustering
you must have been lustering
they must have been lustering	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not luster
you must not luster
he must not luster
we must not luster
you must not luster
they must not luster 	I must not be lustering
you must not be lustering
he must not be lustering
we must not be lustering
you must not be lustering
they must not be lustering	I must not have lustered
you must not have lustered
he must not have lustered
we must not have lustered
you must not have lustered
they must not have lustered	I must not have been lustering
you must not have been lustering
he must not have been lustering
we must not have been lustering
you must not have been lustering
they must not have been lustering	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I luster?
must you luster?
must he luster?
must we luster?
must you luster?
must they luster? 	must I be lustering?
must you be lustering?
must he be lustering?
must we be lustering?
must you be lustering?
must they be lustering? 	must I have lustered?
must you have lustered?
must he have lustered?
must we have lustered?
must you have lustered?
must they have lustered? 	must I have been lustering?
must you have been lustering?
must he have been lustering?
must we have been lustering?
must you have been lustering?
must they have been lustering? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not luster?
must you not luster?
must he not luster?
must we not luster?
must you not luster?
must they not luster? 	must I not be lustering?
must you not be lustering?
must he not be lustering?
must we not be lustering?
must you not be lustering?
must they not be lustering? 	must I not have lustered?
must you not have lustered?
must he not have lustered?
must we not have lustered?
must you not have lustered?
must they not have lustered? 	must I not have been lustering?
must you not have been lustering?
must he not have been lustering?
must we not have been lustering?
must you not have been lustering?
must they not have been lustering?