could vulcanise
Verbe régulier : vulcanise - vulcanised- vulcanised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could vulcanise
you could vulcanise
he could vulcanise
we could vulcanise
you could vulcanise
they could vulcanise 	I could be vulcanising
you could be vulcanising
he could be vulcanising
we could be vulcanising
you could be vulcanising
they could be vulcanising	I could have vulcanised
you could have vulcanised
he could have vulcanised
we could have vulcanised
you could have vulcanised
they could have vulcanised	I could have been vulcanising
you could have been vulcanising
he could have been vulcanising
we could have been vulcanising
you could have been vulcanising
they could have been vulcanising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not vulcanise
you could not vulcanise
he could not vulcanise
we could not vulcanise
you could not vulcanise
they could not vulcanise 	I could not be vulcanising
you could not be vulcanising
he could not be vulcanising
we could not be vulcanising
you could not be vulcanising
they could not be vulcanising	I could not have vulcanised
you could not have vulcanised
he could not have vulcanised
we could not have vulcanised
you could not have vulcanised
they could not have vulcanised	I could not have been vulcanising
you could not have been vulcanising
he could not have been vulcanising
we could not have been vulcanising
you could not have been vulcanising
they could not have been vulcanising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I vulcanise?
could you vulcanise?
could he vulcanise?
could we vulcanise?
could you vulcanise?
could they vulcanise? 	could I be vulcanising?
could you be vulcanising?
could he be vulcanising?
could we be vulcanising?
could you be vulcanising?
could they be vulcanising? 	could I have vulcanised?
could you have vulcanised?
could he have vulcanised?
could we have vulcanised?
could you have vulcanised?
could they have vulcanised? 	could I have been vulcanising?
could you have been vulcanising?
could he have been vulcanising?
could we have been vulcanising?
could you have been vulcanising?
could they have been vulcanising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not vulcanise?
could you not vulcanise?
could he not vulcanise?
could we not vulcanise?
could you not vulcanise?
could they not vulcanise? 	could I not be vulcanising?
could you not be vulcanising?
could he not be vulcanising?
could we not be vulcanising?
could you not be vulcanising?
could they not be vulcanising? 	could I not have vulcanised?
could you not have vulcanised?
could he not have vulcanised?
could we not have vulcanised?
could you not have vulcanised?
could they not have vulcanised? 	could I not have been vulcanising?
could you not have been vulcanising?
could he not have been vulcanising?
could we not have been vulcanising?
could you not have been vulcanising?
could they not have been vulcanising?