could fossilize
Verbo regular: fossilize - fossilized- fossilized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could fossilize
you could fossilize
he could fossilize
we could fossilize
you could fossilize
they could fossilize 	I could be fossilizing
you could be fossilizing
he could be fossilizing
we could be fossilizing
you could be fossilizing
they could be fossilizing	I could have fossilized
you could have fossilized
he could have fossilized
we could have fossilized
you could have fossilized
they could have fossilized	I could have been fossilizing
you could have been fossilizing
he could have been fossilizing
we could have been fossilizing
you could have been fossilizing
they could have been fossilizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not fossilize
you could not fossilize
he could not fossilize
we could not fossilize
you could not fossilize
they could not fossilize 	I could not be fossilizing
you could not be fossilizing
he could not be fossilizing
we could not be fossilizing
you could not be fossilizing
they could not be fossilizing	I could not have fossilized
you could not have fossilized
he could not have fossilized
we could not have fossilized
you could not have fossilized
they could not have fossilized	I could not have been fossilizing
you could not have been fossilizing
he could not have been fossilizing
we could not have been fossilizing
you could not have been fossilizing
they could not have been fossilizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I fossilize?
could you fossilize?
could he fossilize?
could we fossilize?
could you fossilize?
could they fossilize? 	could I be fossilizing?
could you be fossilizing?
could he be fossilizing?
could we be fossilizing?
could you be fossilizing?
could they be fossilizing? 	could I have fossilized?
could you have fossilized?
could he have fossilized?
could we have fossilized?
could you have fossilized?
could they have fossilized? 	could I have been fossilizing?
could you have been fossilizing?
could he have been fossilizing?
could we have been fossilizing?
could you have been fossilizing?
could they have been fossilizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not fossilize?
could you not fossilize?
could he not fossilize?
could we not fossilize?
could you not fossilize?
could they not fossilize? 	could I not be fossilizing?
could you not be fossilizing?
could he not be fossilizing?
could we not be fossilizing?
could you not be fossilizing?
could they not be fossilizing? 	could I not have fossilized?
could you not have fossilized?
could he not have fossilized?
could we not have fossilized?
could you not have fossilized?
could they not have fossilized? 	could I not have been fossilizing?
could you not have been fossilizing?
could he not have been fossilizing?
could we not have been fossilizing?
could you not have been fossilizing?
could they not have been fossilizing?