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

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should concentrate
you should concentrate
he should concentrate
we should concentrate
you should concentrate
they should concentrate 	I should be concentrating
you should be concentrating
he should be concentrating
we should be concentrating
you should be concentrating
they should be concentrating	I should have concentrated
you should have concentrated
he should have concentrated
we should have concentrated
you should have concentrated
they should have concentrated	I should have been concentrating
you should have been concentrating
he should have been concentrating
we should have been concentrating
you should have been concentrating
they should have been concentrating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should not concentrate
you should not concentrate
he should not concentrate
we should not concentrate
you should not concentrate
they should not concentrate 	I should not be concentrating
you should not be concentrating
he should not be concentrating
we should not be concentrating
you should not be concentrating
they should not be concentrating	I should not have concentrated
you should not have concentrated
he should not have concentrated
we should not have concentrated
you should not have concentrated
they should not have concentrated	I should not have been concentrating
you should not have been concentrating
he should not have been concentrating
we should not have been concentrating
you should not have been concentrating
they should not have been concentrating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I not concentrate?
should you not concentrate?
should he not concentrate?
should we not concentrate?
should you not concentrate?
should they not concentrate? 	should I not be concentrating?
should you not be concentrating?
should he not be concentrating?
should we not be concentrating?
should you not be concentrating?
should they not be concentrating? 	should I not have concentrated?
should you not have concentrated?
should he not have concentrated?
should we not have concentrated?
should you not have concentrated?
should they not have concentrated? 	should I not have been concentrating?
should you not have been concentrating?
should he not have been concentrating?
should we not have been concentrating?
should you not have been concentrating?
should they not have been concentrating?