could decaffeinate
Verbe régulier : decaffeinate - decaffeinated- decaffeinated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could decaffeinate
you could decaffeinate
she could decaffeinate
we could decaffeinate
you could decaffeinate
they could decaffeinate 	I could be decaffeinating
you could be decaffeinating
she could be decaffeinating
we could be decaffeinating
you could be decaffeinating
they could be decaffeinating	I could have decaffeinated
you could have decaffeinated
she could have decaffeinated
we could have decaffeinated
you could have decaffeinated
they could have decaffeinated	I could have been decaffeinating
you could have been decaffeinating
she could have been decaffeinating
we could have been decaffeinating
you could have been decaffeinating
they could have been decaffeinating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't decaffeinate
you couldn't decaffeinate
she couldn't decaffeinate
we couldn't decaffeinate
you couldn't decaffeinate
they couldn't decaffeinate 	I couldn't be decaffeinating
you couldn't be decaffeinating
she couldn't be decaffeinating
we couldn't be decaffeinating
you couldn't be decaffeinating
they couldn't be decaffeinating	I couldn't have decaffeinated
you couldn't have decaffeinated
she couldn't have decaffeinated
we couldn't have decaffeinated
you couldn't have decaffeinated
they couldn't have decaffeinated	I couldn't have been decaffeinating
you couldn't have been decaffeinating
she couldn't have been decaffeinating
we couldn't have been decaffeinating
you couldn't have been decaffeinating
they couldn't have been decaffeinating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I decaffeinate?
could you decaffeinate?
could she decaffeinate?
could we decaffeinate?
could you decaffeinate?
could they decaffeinate? 	could I be decaffeinating?
could you be decaffeinating?
could she be decaffeinating?
could we be decaffeinating?
could you be decaffeinating?
could they be decaffeinating? 	could I have decaffeinated?
could you have decaffeinated?
could she have decaffeinated?
could we have decaffeinated?
could you have decaffeinated?
could they have decaffeinated? 	could I have been decaffeinating?
could you have been decaffeinating?
could she have been decaffeinating?
could we have been decaffeinating?
could you have been decaffeinating?
could they have been decaffeinating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I decaffeinate?
couldn't you decaffeinate?
couldn't she decaffeinate?
couldn't we decaffeinate?
couldn't you decaffeinate?
couldn't they decaffeinate? 	couldn't I be decaffeinating?
couldn't you be decaffeinating?
couldn't she be decaffeinating?
couldn't we be decaffeinating?
couldn't you be decaffeinating?
couldn't they be decaffeinating? 	couldn't I have decaffeinated?
couldn't you have decaffeinated?
couldn't she have decaffeinated?
couldn't we have decaffeinated?
couldn't you have decaffeinated?
couldn't they have decaffeinated? 	couldn't I have been decaffeinating?
couldn't you have been decaffeinating?
couldn't she have been decaffeinating?
couldn't we have been decaffeinating?
couldn't you have been decaffeinating?
couldn't they have been decaffeinating?