could economize
Verbo regular: economize - economized- economized

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't economize
you couldn't economize
he couldn't economize
we couldn't economize
you couldn't economize
they couldn't economize 	I couldn't be economizing
you couldn't be economizing
he couldn't be economizing
we couldn't be economizing
you couldn't be economizing
they couldn't be economizing	I couldn't have economized
you couldn't have economized
he couldn't have economized
we couldn't have economized
you couldn't have economized
they couldn't have economized	I couldn't have been economizing
you couldn't have been economizing
he couldn't have been economizing
we couldn't have been economizing
you couldn't have been economizing
they couldn't have been economizing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I economize?
couldn't you economize?
couldn't he economize?
couldn't we economize?
couldn't you economize?
couldn't they economize? 	couldn't I be economizing?
couldn't you be economizing?
couldn't he be economizing?
couldn't we be economizing?
couldn't you be economizing?
couldn't they be economizing? 	couldn't I have economized?
couldn't you have economized?
couldn't he have economized?
couldn't we have economized?
couldn't you have economized?
couldn't they have economized? 	couldn't I have been economizing?
couldn't you have been economizing?
couldn't he have been economizing?
couldn't we have been economizing?
couldn't you have been economizing?
couldn't they have been economizing?