could customize
Verbo regular: customize - customized- customized

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could customize
you could customize
she could customize
we could customize
you could customize
they could customize 	I could be customizing
you could be customizing
she could be customizing
we could be customizing
you could be customizing
they could be customizing	I could have customized
you could have customized
she could have customized
we could have customized
you could have customized
they could have customized	I could have been customizing
you could have been customizing
she could have been customizing
we could have been customizing
you could have been customizing
they could have been customizing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't customize
you couldn't customize
she couldn't customize
we couldn't customize
you couldn't customize
they couldn't customize 	I couldn't be customizing
you couldn't be customizing
she couldn't be customizing
we couldn't be customizing
you couldn't be customizing
they couldn't be customizing	I couldn't have customized
you couldn't have customized
she couldn't have customized
we couldn't have customized
you couldn't have customized
they couldn't have customized	I couldn't have been customizing
you couldn't have been customizing
she couldn't have been customizing
we couldn't have been customizing
you couldn't have been customizing
they couldn't have been customizing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I customize?
could you customize?
could she customize?
could we customize?
could you customize?
could they customize? 	could I be customizing?
could you be customizing?
could she be customizing?
could we be customizing?
could you be customizing?
could they be customizing? 	could I have customized?
could you have customized?
could she have customized?
could we have customized?
could you have customized?
could they have customized? 	could I have been customizing?
could you have been customizing?
could she have been customizing?
could we have been customizing?
could you have been customizing?
could they have been customizing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I customize?
couldn't you customize?
couldn't she customize?
couldn't we customize?
couldn't you customize?
couldn't they customize? 	couldn't I be customizing?
couldn't you be customizing?
couldn't she be customizing?
couldn't we be customizing?
couldn't you be customizing?
couldn't they be customizing? 	couldn't I have customized?
couldn't you have customized?
couldn't she have customized?
couldn't we have customized?
couldn't you have customized?
couldn't they have customized? 	couldn't I have been customizing?
couldn't you have been customizing?
couldn't she have been customizing?
couldn't we have been customizing?
couldn't you have been customizing?
couldn't they have been customizing?