could sulfurize
Verbe régulier : sulfurize - sulfurized- sulfurized

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could sulfurize
you could sulfurize
she could sulfurize
we could sulfurize
you could sulfurize
they could sulfurize 	I could be sulfurizing
you could be sulfurizing
she could be sulfurizing
we could be sulfurizing
you could be sulfurizing
they could be sulfurizing	I could have sulfurized
you could have sulfurized
she could have sulfurized
we could have sulfurized
you could have sulfurized
they could have sulfurized	I could have been sulfurizing
you could have been sulfurizing
she could have been sulfurizing
we could have been sulfurizing
you could have been sulfurizing
they could have been sulfurizing	

Négation 	
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I couldn't sulfurize
you couldn't sulfurize
she couldn't sulfurize
we couldn't sulfurize
you couldn't sulfurize
they couldn't sulfurize 	I couldn't be sulfurizing
you couldn't be sulfurizing
she couldn't be sulfurizing
we couldn't be sulfurizing
you couldn't be sulfurizing
they couldn't be sulfurizing	I couldn't have sulfurized
you couldn't have sulfurized
she couldn't have sulfurized
we couldn't have sulfurized
you couldn't have sulfurized
they couldn't have sulfurized	I couldn't have been sulfurizing
you couldn't have been sulfurizing
she couldn't have been sulfurizing
we couldn't have been sulfurizing
you couldn't have been sulfurizing
they couldn't have been sulfurizing	

Forme interrogative 	
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could I sulfurize?
could you sulfurize?
could she sulfurize?
could we sulfurize?
could you sulfurize?
could they sulfurize? 	could I be sulfurizing?
could you be sulfurizing?
could she be sulfurizing?
could we be sulfurizing?
could you be sulfurizing?
could they be sulfurizing? 	could I have sulfurized?
could you have sulfurized?
could she have sulfurized?
could we have sulfurized?
could you have sulfurized?
could they have sulfurized? 	could I have been sulfurizing?
could you have been sulfurizing?
could she have been sulfurizing?
could we have been sulfurizing?
could you have been sulfurizing?
could they have been sulfurizing? 	

Forme interro-négative 	
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couldn't I sulfurize?
couldn't you sulfurize?
couldn't she sulfurize?
couldn't we sulfurize?
couldn't you sulfurize?
couldn't they sulfurize? 	couldn't I be sulfurizing?
couldn't you be sulfurizing?
couldn't she be sulfurizing?
couldn't we be sulfurizing?
couldn't you be sulfurizing?
couldn't they be sulfurizing? 	couldn't I have sulfurized?
couldn't you have sulfurized?
couldn't she have sulfurized?
couldn't we have sulfurized?
couldn't you have sulfurized?
couldn't they have sulfurized? 	couldn't I have been sulfurizing?
couldn't you have been sulfurizing?
couldn't she have been sulfurizing?
couldn't we have been sulfurizing?
couldn't you have been sulfurizing?
couldn't they have been sulfurizing?