could oxidize
Verbo regular: oxidize - oxidized- oxidized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could oxidize
you could oxidize
she could oxidize
we could oxidize
you could oxidize
they could oxidize 	I could be oxidizing
you could be oxidizing
she could be oxidizing
we could be oxidizing
you could be oxidizing
they could be oxidizing	I could have oxidized
you could have oxidized
she could have oxidized
we could have oxidized
you could have oxidized
they could have oxidized	I could have been oxidizing
you could have been oxidizing
she could have been oxidizing
we could have been oxidizing
you could have been oxidizing
they could have been oxidizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not oxidize
you could not oxidize
she could not oxidize
we could not oxidize
you could not oxidize
they could not oxidize 	I could not be oxidizing
you could not be oxidizing
she could not be oxidizing
we could not be oxidizing
you could not be oxidizing
they could not be oxidizing	I could not have oxidized
you could not have oxidized
she could not have oxidized
we could not have oxidized
you could not have oxidized
they could not have oxidized	I could not have been oxidizing
you could not have been oxidizing
she could not have been oxidizing
we could not have been oxidizing
you could not have been oxidizing
they could not have been oxidizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I oxidize?
could you oxidize?
could she oxidize?
could we oxidize?
could you oxidize?
could they oxidize? 	could I be oxidizing?
could you be oxidizing?
could she be oxidizing?
could we be oxidizing?
could you be oxidizing?
could they be oxidizing? 	could I have oxidized?
could you have oxidized?
could she have oxidized?
could we have oxidized?
could you have oxidized?
could they have oxidized? 	could I have been oxidizing?
could you have been oxidizing?
could she have been oxidizing?
could we have been oxidizing?
could you have been oxidizing?
could they have been oxidizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not oxidize?
could you not oxidize?
could she not oxidize?
could we not oxidize?
could you not oxidize?
could they not oxidize? 	could I not be oxidizing?
could you not be oxidizing?
could she not be oxidizing?
could we not be oxidizing?
could you not be oxidizing?
could they not be oxidizing? 	could I not have oxidized?
could you not have oxidized?
could she not have oxidized?
could we not have oxidized?
could you not have oxidized?
could they not have oxidized? 	could I not have been oxidizing?
could you not have been oxidizing?
could she not have been oxidizing?
could we not have been oxidizing?
could you not have been oxidizing?
could they not have been oxidizing?