could vulcanize
Verbe régulier : vulcanize - vulcanized- vulcanized

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't vulcanize
you couldn't vulcanize
she couldn't vulcanize
we couldn't vulcanize
you couldn't vulcanize
they couldn't vulcanize 	I couldn't be vulcanizing
you couldn't be vulcanizing
she couldn't be vulcanizing
we couldn't be vulcanizing
you couldn't be vulcanizing
they couldn't be vulcanizing	I couldn't have vulcanized
you couldn't have vulcanized
she couldn't have vulcanized
we couldn't have vulcanized
you couldn't have vulcanized
they couldn't have vulcanized	I couldn't have been vulcanizing
you couldn't have been vulcanizing
she couldn't have been vulcanizing
we couldn't have been vulcanizing
you couldn't have been vulcanizing
they couldn't have been vulcanizing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en 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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I vulcanize?
couldn't you vulcanize?
couldn't she vulcanize?
couldn't we vulcanize?
couldn't you vulcanize?
couldn't they vulcanize? 	couldn't I be vulcanizing?
couldn't you be vulcanizing?
couldn't she be vulcanizing?
couldn't we be vulcanizing?
couldn't you be vulcanizing?
couldn't they be vulcanizing? 	couldn't I have vulcanized?
couldn't you have vulcanized?
couldn't she have vulcanized?
couldn't we have vulcanized?
couldn't you have vulcanized?
couldn't they have vulcanized? 	couldn't I have been vulcanizing?
couldn't you have been vulcanizing?
couldn't she have been vulcanizing?
couldn't we have been vulcanizing?
couldn't you have been vulcanizing?
couldn't they have been vulcanizing?