must economize
Verbo regular: economize - economized- economized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must economize
you must economize
he must economize
we must economize
you must economize
they must economize 	I must be economizing
you must be economizing
he must be economizing
we must be economizing
you must be economizing
they must be economizing	I must have economized
you must have economized
he must have economized
we must have economized
you must have economized
they must have economized	I must have been economizing
you must have been economizing
he must have been economizing
we must have been economizing
you must have been economizing
they must have been economizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not economize
you must not economize
he must not economize
we must not economize
you must not economize
they must not economize 	I must not be economizing
you must not be economizing
he must not be economizing
we must not be economizing
you must not be economizing
they must not be economizing	I must not have economized
you must not have economized
he must not have economized
we must not have economized
you must not have economized
they must not have economized	I must not have been economizing
you must not have been economizing
he must not have been economizing
we must not have been economizing
you must not have been economizing
they must not have been economizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I economize?
must you economize?
must he economize?
must we economize?
must you economize?
must they economize? 	must I be economizing?
must you be economizing?
must he be economizing?
must we be economizing?
must you be economizing?
must they be economizing? 	must I have economized?
must you have economized?
must he have economized?
must we have economized?
must you have economized?
must they have economized? 	must I have been economizing?
must you have been economizing?
must he have been economizing?
must we have been economizing?
must you have been economizing?
must they have been economizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not economize?
must you not economize?
must he not economize?
must we not economize?
must you not economize?
must they not economize? 	must I not be economizing?
must you not be economizing?
must he not be economizing?
must we not be economizing?
must you not be economizing?
must they not be economizing? 	must I not have economized?
must you not have economized?
must he not have economized?
must we not have economized?
must you not have economized?
must they not have economized? 	must I not have been economizing?
must you not have been economizing?
must he not have been economizing?
must we not have been economizing?
must you not have been economizing?
must they not have been economizing?