must customize
Verbo regular: customize - customized- customized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must customize
you must customize
she must customize
we must customize
you must customize
they must customize 	I must be customizing
you must be customizing
she must be customizing
we must be customizing
you must be customizing
they must be customizing	I must have customized
you must have customized
she must have customized
we must have customized
you must have customized
they must have customized	I must have been customizing
you must have been customizing
she must have been customizing
we must have been customizing
you must have been customizing
they must have been customizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not customize
you must not customize
she must not customize
we must not customize
you must not customize
they must not customize 	I must not be customizing
you must not be customizing
she must not be customizing
we must not be customizing
you must not be customizing
they must not be customizing	I must not have customized
you must not have customized
she must not have customized
we must not have customized
you must not have customized
they must not have customized	I must not have been customizing
you must not have been customizing
she must not have been customizing
we must not have been customizing
you must not have been customizing
they must not have been customizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I customize?
must you customize?
must she customize?
must we customize?
must you customize?
must they customize? 	must I be customizing?
must you be customizing?
must she be customizing?
must we be customizing?
must you be customizing?
must they be customizing? 	must I have customized?
must you have customized?
must she have customized?
must we have customized?
must you have customized?
must they have customized? 	must I have been customizing?
must you have been customizing?
must she have been customizing?
must we have been customizing?
must you have been customizing?
must they have been customizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not customize?
must you not customize?
must she not customize?
must we not customize?
must you not customize?
must they not customize? 	must I not be customizing?
must you not be customizing?
must she not be customizing?
must we not be customizing?
must you not be customizing?
must they not be customizing? 	must I not have customized?
must you not have customized?
must she not have customized?
must we not have customized?
must you not have customized?
must they not have customized? 	must I not have been customizing?
must you not have been customizing?
must she not have been customizing?
must we not have been customizing?
must you not have been customizing?
must they not have been customizing?