could perfect
Verbe régulier : perfect - perfected- perfected
Traduction française : perfectionner - mettre au point 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could perfect
you could perfect
she could perfect
we could perfect
you could perfect
they could perfect 	I could be perfecting
you could be perfecting
she could be perfecting
we could be perfecting
you could be perfecting
they could be perfecting	I could have perfected
you could have perfected
she could have perfected
we could have perfected
you could have perfected
they could have perfected	I could have been perfecting
you could have been perfecting
she could have been perfecting
we could have been perfecting
you could have been perfecting
they could have been perfecting	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't perfect
you couldn't perfect
she couldn't perfect
we couldn't perfect
you couldn't perfect
they couldn't perfect 	I couldn't be perfecting
you couldn't be perfecting
she couldn't be perfecting
we couldn't be perfecting
you couldn't be perfecting
they couldn't be perfecting	I couldn't have perfected
you couldn't have perfected
she couldn't have perfected
we couldn't have perfected
you couldn't have perfected
they couldn't have perfected	I couldn't have been perfecting
you couldn't have been perfecting
she couldn't have been perfecting
we couldn't have been perfecting
you couldn't have been perfecting
they couldn't have been perfecting	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I perfect?
could you perfect?
could she perfect?
could we perfect?
could you perfect?
could they perfect? 	could I be perfecting?
could you be perfecting?
could she be perfecting?
could we be perfecting?
could you be perfecting?
could they be perfecting? 	could I have perfected?
could you have perfected?
could she have perfected?
could we have perfected?
could you have perfected?
could they have perfected? 	could I have been perfecting?
could you have been perfecting?
could she have been perfecting?
could we have been perfecting?
could you have been perfecting?
could they have been perfecting? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I perfect?
couldn't you perfect?
couldn't she perfect?
couldn't we perfect?
couldn't you perfect?
couldn't they perfect? 	couldn't I be perfecting?
couldn't you be perfecting?
couldn't she be perfecting?
couldn't we be perfecting?
couldn't you be perfecting?
couldn't they be perfecting? 	couldn't I have perfected?
couldn't you have perfected?
couldn't she have perfected?
couldn't we have perfected?
couldn't you have perfected?
couldn't they have perfected? 	couldn't I have been perfecting?
couldn't you have been perfecting?
couldn't she have been perfecting?
couldn't we have been perfecting?
couldn't you have been perfecting?
couldn't they have been perfecting?