should concentrate
Verbe régulier : concentrate - concentrated- concentrated
Traduction française : se concentrer - concentrer 

Affirmation 	
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I'd concentrate
you'd concentrate
he'd concentrate
we'd concentrate
you'd concentrate
they'd concentrate 	I'd be concentrating
you'd be concentrating
he'd be concentrating
we'd be concentrating
you'd be concentrating
they'd be concentrating	I should've concentrated
you should've concentrated
he should've concentrated
we should've concentrated
you should've concentrated
they should've concentrated	I should've been concentrating
you should've been concentrating
he should've been concentrating
we should've been concentrating
you should've been concentrating
they should've been concentrating	

Négation 	
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I shouldn't concentrate
you shouldn't concentrate
he shouldn't concentrate
we shouldn't concentrate
you shouldn't concentrate
they shouldn't concentrate 	I shouldn't be concentrating
you shouldn't be concentrating
he shouldn't be concentrating
we shouldn't be concentrating
you shouldn't be concentrating
they shouldn't be concentrating	I shouldn't have concentrated
you shouldn't have concentrated
he shouldn't have concentrated
we shouldn't have concentrated
you shouldn't have concentrated
they shouldn't have concentrated	I shouldn't have been concentrating
you shouldn't have been concentrating
he shouldn't have been concentrating
we shouldn't have been concentrating
you shouldn't have been concentrating
they shouldn't have been concentrating	

Forme interrogative 	
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should I concentrate?
should you concentrate?
should he concentrate?
should we concentrate?
should you concentrate?
should they concentrate? 	should I be concentrating?
should you be concentrating?
should he be concentrating?
should we be concentrating?
should you be concentrating?
should they be concentrating? 	should I have concentrated?
should you have concentrated?
should he have concentrated?
should we have concentrated?
should you have concentrated?
should they have concentrated? 	should I have been concentrating?
should you have been concentrating?
should he have been concentrating?
should we have been concentrating?
should you have been concentrating?
should they have been concentrating? 	

Forme interro-négative 	
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shouldn't I concentrate?
shouldn't you concentrate?
shouldn't he concentrate?
shouldn't we concentrate?
shouldn't you concentrate?
shouldn't they concentrate? 	shouldn't I be concentrating?
shouldn't you be concentrating?
shouldn't he be concentrating?
shouldn't we be concentrating?
shouldn't you be concentrating?
shouldn't they be concentrating? 	shouldn't I have concentrated?
shouldn't you have concentrated?
shouldn't he have concentrated?
shouldn't we have concentrated?
shouldn't you have concentrated?
shouldn't they have concentrated? 	shouldn't I have been concentrating?
shouldn't you have been concentrating?
shouldn't he have been concentrating?
shouldn't we have been concentrating?
shouldn't you have been concentrating?
shouldn't they have been concentrating?