could leister
Verbe régulier : leister - leistered- leistered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could leister
you could leister
he could leister
we could leister
you could leister
they could leister 	I could be leistering
you could be leistering
he could be leistering
we could be leistering
you could be leistering
they could be leistering	I could have leistered
you could have leistered
he could have leistered
we could have leistered
you could have leistered
they could have leistered	I could have been leistering
you could have been leistering
he could have been leistering
we could have been leistering
you could have been leistering
they could have been leistering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't leister
you couldn't leister
he couldn't leister
we couldn't leister
you couldn't leister
they couldn't leister 	I couldn't be leistering
you couldn't be leistering
he couldn't be leistering
we couldn't be leistering
you couldn't be leistering
they couldn't be leistering	I couldn't have leistered
you couldn't have leistered
he couldn't have leistered
we couldn't have leistered
you couldn't have leistered
they couldn't have leistered	I couldn't have been leistering
you couldn't have been leistering
he couldn't have been leistering
we couldn't have been leistering
you couldn't have been leistering
they couldn't have been leistering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I leister?
could you leister?
could he leister?
could we leister?
could you leister?
could they leister? 	could I be leistering?
could you be leistering?
could he be leistering?
could we be leistering?
could you be leistering?
could they be leistering? 	could I have leistered?
could you have leistered?
could he have leistered?
could we have leistered?
could you have leistered?
could they have leistered? 	could I have been leistering?
could you have been leistering?
could he have been leistering?
could we have been leistering?
could you have been leistering?
could they have been leistering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I leister?
couldn't you leister?
couldn't he leister?
couldn't we leister?
couldn't you leister?
couldn't they leister? 	couldn't I be leistering?
couldn't you be leistering?
couldn't he be leistering?
couldn't we be leistering?
couldn't you be leistering?
couldn't they be leistering? 	couldn't I have leistered?
couldn't you have leistered?
couldn't he have leistered?
couldn't we have leistered?
couldn't you have leistered?
couldn't they have leistered? 	couldn't I have been leistering?
couldn't you have been leistering?
couldn't he have been leistering?
couldn't we have been leistering?
couldn't you have been leistering?
couldn't they have been leistering?