could isomerize
Verbo regular: isomerize - isomerized- isomerized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could isomerize
you could isomerize
she could isomerize
we could isomerize
you could isomerize
they could isomerize 	I could be isomerizing
you could be isomerizing
she could be isomerizing
we could be isomerizing
you could be isomerizing
they could be isomerizing	I could have isomerized
you could have isomerized
she could have isomerized
we could have isomerized
you could have isomerized
they could have isomerized	I could have been isomerizing
you could have been isomerizing
she could have been isomerizing
we could have been isomerizing
you could have been isomerizing
they could have been isomerizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't isomerize
you couldn't isomerize
she couldn't isomerize
we couldn't isomerize
you couldn't isomerize
they couldn't isomerize 	I couldn't be isomerizing
you couldn't be isomerizing
she couldn't be isomerizing
we couldn't be isomerizing
you couldn't be isomerizing
they couldn't be isomerizing	I couldn't have isomerized
you couldn't have isomerized
she couldn't have isomerized
we couldn't have isomerized
you couldn't have isomerized
they couldn't have isomerized	I couldn't have been isomerizing
you couldn't have been isomerizing
she couldn't have been isomerizing
we couldn't have been isomerizing
you couldn't have been isomerizing
they couldn't have been isomerizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I isomerize?
could you isomerize?
could she isomerize?
could we isomerize?
could you isomerize?
could they isomerize? 	could I be isomerizing?
could you be isomerizing?
could she be isomerizing?
could we be isomerizing?
could you be isomerizing?
could they be isomerizing? 	could I have isomerized?
could you have isomerized?
could she have isomerized?
could we have isomerized?
could you have isomerized?
could they have isomerized? 	could I have been isomerizing?
could you have been isomerizing?
could she have been isomerizing?
could we have been isomerizing?
could you have been isomerizing?
could they have been isomerizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I isomerize?
couldn't you isomerize?
couldn't she isomerize?
couldn't we isomerize?
couldn't you isomerize?
couldn't they isomerize? 	couldn't I be isomerizing?
couldn't you be isomerizing?
couldn't she be isomerizing?
couldn't we be isomerizing?
couldn't you be isomerizing?
couldn't they be isomerizing? 	couldn't I have isomerized?
couldn't you have isomerized?
couldn't she have isomerized?
couldn't we have isomerized?
couldn't you have isomerized?
couldn't they have isomerized? 	couldn't I have been isomerizing?
couldn't you have been isomerizing?
couldn't she have been isomerizing?
couldn't we have been isomerizing?
couldn't you have been isomerizing?
couldn't they have been isomerizing?