should concenter
Verbe régulier : concenter - concentered- concentered

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I'd concenter
you'd concenter
she'd concenter
we'd concenter
you'd concenter
they'd concenter 	I'd be concentering
you'd be concentering
she'd be concentering
we'd be concentering
you'd be concentering
they'd be concentering	I should've concentered
you should've concentered
she should've concentered
we should've concentered
you should've concentered
they should've concentered	I should've been concentering
you should've been concentering
she should've been concentering
we should've been concentering
you should've been concentering
they should've been concentering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I shouldn't concenter
you shouldn't concenter
she shouldn't concenter
we shouldn't concenter
you shouldn't concenter
they shouldn't concenter 	I shouldn't be concentering
you shouldn't be concentering
she shouldn't be concentering
we shouldn't be concentering
you shouldn't be concentering
they shouldn't be concentering	I shouldn't have concentered
you shouldn't have concentered
she shouldn't have concentered
we shouldn't have concentered
you shouldn't have concentered
they shouldn't have concentered	I shouldn't have been concentering
you shouldn't have been concentering
she shouldn't have been concentering
we shouldn't have been concentering
you shouldn't have been concentering
they shouldn't have been concentering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I concenter?
should you concenter?
should she concenter?
should we concenter?
should you concenter?
should they concenter? 	should I be concentering?
should you be concentering?
should she be concentering?
should we be concentering?
should you be concentering?
should they be concentering? 	should I have concentered?
should you have concentered?
should she have concentered?
should we have concentered?
should you have concentered?
should they have concentered? 	should I have been concentering?
should you have been concentering?
should she have been concentering?
should we have been concentering?
should you have been concentering?
should they have been concentering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
shouldn't I concenter?
shouldn't you concenter?
shouldn't she concenter?
shouldn't we concenter?
shouldn't you concenter?
shouldn't they concenter? 	shouldn't I be concentering?
shouldn't you be concentering?
shouldn't she be concentering?
shouldn't we be concentering?
shouldn't you be concentering?
shouldn't they be concentering? 	shouldn't I have concentered?
shouldn't you have concentered?
shouldn't she have concentered?
shouldn't we have concentered?
shouldn't you have concentered?
shouldn't they have concentered? 	shouldn't I have been concentering?
shouldn't you have been concentering?
shouldn't she have been concentering?
shouldn't we have been concentering?
shouldn't you have been concentering?
shouldn't they have been concentering?