could vulcanize
Verbo regular: vulcanize - vulcanized- vulcanized

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could vulcanize
you could vulcanize
she could vulcanize
we could vulcanize
you could vulcanize
they could vulcanize 	I could be vulcanizing
you could be vulcanizing
she could be vulcanizing
we could be vulcanizing
you could be vulcanizing
they could be vulcanizing	I could have vulcanized
you could have vulcanized
she could have vulcanized
we could have vulcanized
you could have vulcanized
they could have vulcanized	I could have been vulcanizing
you could have been vulcanizing
she could have been vulcanizing
we could have been vulcanizing
you could have been vulcanizing
they could have been vulcanizing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not vulcanize
you could not vulcanize
she could not vulcanize
we could not vulcanize
you could not vulcanize
they could not vulcanize 	I could not be vulcanizing
you could not be vulcanizing
she could not be vulcanizing
we could not be vulcanizing
you could not be vulcanizing
they could not be vulcanizing	I could not have vulcanized
you could not have vulcanized
she could not have vulcanized
we could not have vulcanized
you could not have vulcanized
they could not have vulcanized	I could not have been vulcanizing
you could not have been vulcanizing
she could not have been vulcanizing
we could not have been vulcanizing
you could not have been vulcanizing
they could not have been vulcanizing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I vulcanize?
could you vulcanize?
could she vulcanize?
could we vulcanize?
could you vulcanize?
could they vulcanize? 	could I be vulcanizing?
could you be vulcanizing?
could she be vulcanizing?
could we be vulcanizing?
could you be vulcanizing?
could they be vulcanizing? 	could I have vulcanized?
could you have vulcanized?
could she have vulcanized?
could we have vulcanized?
could you have vulcanized?
could they have vulcanized? 	could I have been vulcanizing?
could you have been vulcanizing?
could she have been vulcanizing?
could we have been vulcanizing?
could you have been vulcanizing?
could they have been vulcanizing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not vulcanize?
could you not vulcanize?
could she not vulcanize?
could we not vulcanize?
could you not vulcanize?
could they not vulcanize? 	could I not be vulcanizing?
could you not be vulcanizing?
could she not be vulcanizing?
could we not be vulcanizing?
could you not be vulcanizing?
could they not be vulcanizing? 	could I not have vulcanized?
could you not have vulcanized?
could she not have vulcanized?
could we not have vulcanized?
could you not have vulcanized?
could they not have vulcanized? 	could I not have been vulcanizing?
could you not have been vulcanizing?
could she not have been vulcanizing?
could we not have been vulcanizing?
could you not have been vulcanizing?
could they not have been vulcanizing?