could function
Verbe régulier : function - functioned- functioned
Traduction française : fonctionner - marcher 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could function
you could function
she could function
we could function
you could function
they could function 	I could be functioning
you could be functioning
she could be functioning
we could be functioning
you could be functioning
they could be functioning	I could have functioned
you could have functioned
she could have functioned
we could have functioned
you could have functioned
they could have functioned	I could have been functioning
you could have been functioning
she could have been functioning
we could have been functioning
you could have been functioning
they could have been functioning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't function
you couldn't function
she couldn't function
we couldn't function
you couldn't function
they couldn't function 	I couldn't be functioning
you couldn't be functioning
she couldn't be functioning
we couldn't be functioning
you couldn't be functioning
they couldn't be functioning	I couldn't have functioned
you couldn't have functioned
she couldn't have functioned
we couldn't have functioned
you couldn't have functioned
they couldn't have functioned	I couldn't have been functioning
you couldn't have been functioning
she couldn't have been functioning
we couldn't have been functioning
you couldn't have been functioning
they couldn't have been functioning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I function?
could you function?
could she function?
could we function?
could you function?
could they function? 	could I be functioning?
could you be functioning?
could she be functioning?
could we be functioning?
could you be functioning?
could they be functioning? 	could I have functioned?
could you have functioned?
could she have functioned?
could we have functioned?
could you have functioned?
could they have functioned? 	could I have been functioning?
could you have been functioning?
could she have been functioning?
could we have been functioning?
could you have been functioning?
could they have been functioning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I function?
couldn't you function?
couldn't she function?
couldn't we function?
couldn't you function?
couldn't they function? 	couldn't I be functioning?
couldn't you be functioning?
couldn't she be functioning?
couldn't we be functioning?
couldn't you be functioning?
couldn't they be functioning? 	couldn't I have functioned?
couldn't you have functioned?
couldn't she have functioned?
couldn't we have functioned?
couldn't you have functioned?
couldn't they have functioned? 	couldn't I have been functioning?
couldn't you have been functioning?
couldn't she have been functioning?
couldn't we have been functioning?
couldn't you have been functioning?
couldn't they have been functioning?