could economize
Verbo regular: economize - economized- economized

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

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

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

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