could oxygenate
Verbo regular: oxygenate - oxygenated- oxygenated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could oxygenate
you could oxygenate
he could oxygenate
we could oxygenate
you could oxygenate
they could oxygenate 	I could be oxygenating
you could be oxygenating
he could be oxygenating
we could be oxygenating
you could be oxygenating
they could be oxygenating	I could have oxygenated
you could have oxygenated
he could have oxygenated
we could have oxygenated
you could have oxygenated
they could have oxygenated	I could have been oxygenating
you could have been oxygenating
he could have been oxygenating
we could have been oxygenating
you could have been oxygenating
they could have been oxygenating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not oxygenate
you could not oxygenate
he could not oxygenate
we could not oxygenate
you could not oxygenate
they could not oxygenate 	I could not be oxygenating
you could not be oxygenating
he could not be oxygenating
we could not be oxygenating
you could not be oxygenating
they could not be oxygenating	I could not have oxygenated
you could not have oxygenated
he could not have oxygenated
we could not have oxygenated
you could not have oxygenated
they could not have oxygenated	I could not have been oxygenating
you could not have been oxygenating
he could not have been oxygenating
we could not have been oxygenating
you could not have been oxygenating
they could not have been oxygenating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I oxygenate?
could you oxygenate?
could he oxygenate?
could we oxygenate?
could you oxygenate?
could they oxygenate? 	could I be oxygenating?
could you be oxygenating?
could he be oxygenating?
could we be oxygenating?
could you be oxygenating?
could they be oxygenating? 	could I have oxygenated?
could you have oxygenated?
could he have oxygenated?
could we have oxygenated?
could you have oxygenated?
could they have oxygenated? 	could I have been oxygenating?
could you have been oxygenating?
could he have been oxygenating?
could we have been oxygenating?
could you have been oxygenating?
could they have been oxygenating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not oxygenate?
could you not oxygenate?
could he not oxygenate?
could we not oxygenate?
could you not oxygenate?
could they not oxygenate? 	could I not be oxygenating?
could you not be oxygenating?
could he not be oxygenating?
could we not be oxygenating?
could you not be oxygenating?
could they not be oxygenating? 	could I not have oxygenated?
could you not have oxygenated?
could he not have oxygenated?
could we not have oxygenated?
could you not have oxygenated?
could they not have oxygenated? 	could I not have been oxygenating?
could you not have been oxygenating?
could he not have been oxygenating?
could we not have been oxygenating?
could you not have been oxygenating?
could they not have been oxygenating?