must concretize
Verbo regular: concretize - concretized- concretized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must concretize
you must concretize
he must concretize
we must concretize
you must concretize
they must concretize 	I must be concretizing
you must be concretizing
he must be concretizing
we must be concretizing
you must be concretizing
they must be concretizing	I must have concretized
you must have concretized
he must have concretized
we must have concretized
you must have concretized
they must have concretized	I must have been concretizing
you must have been concretizing
he must have been concretizing
we must have been concretizing
you must have been concretizing
they must have been concretizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not concretize
you must not concretize
he must not concretize
we must not concretize
you must not concretize
they must not concretize 	I must not be concretizing
you must not be concretizing
he must not be concretizing
we must not be concretizing
you must not be concretizing
they must not be concretizing	I must not have concretized
you must not have concretized
he must not have concretized
we must not have concretized
you must not have concretized
they must not have concretized	I must not have been concretizing
you must not have been concretizing
he must not have been concretizing
we must not have been concretizing
you must not have been concretizing
they must not have been concretizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I concretize?
must you concretize?
must he concretize?
must we concretize?
must you concretize?
must they concretize? 	must I be concretizing?
must you be concretizing?
must he be concretizing?
must we be concretizing?
must you be concretizing?
must they be concretizing? 	must I have concretized?
must you have concretized?
must he have concretized?
must we have concretized?
must you have concretized?
must they have concretized? 	must I have been concretizing?
must you have been concretizing?
must he have been concretizing?
must we have been concretizing?
must you have been concretizing?
must they have been concretizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not concretize?
must you not concretize?
must he not concretize?
must we not concretize?
must you not concretize?
must they not concretize? 	must I not be concretizing?
must you not be concretizing?
must he not be concretizing?
must we not be concretizing?
must you not be concretizing?
must they not be concretizing? 	must I not have concretized?
must you not have concretized?
must he not have concretized?
must we not have concretized?
must you not have concretized?
must they not have concretized? 	must I not have been concretizing?
must you not have been concretizing?
must he not have been concretizing?
must we not have been concretizing?
must you not have been concretizing?
must they not have been concretizing?