should concern
Verbe régulier : concern - concerned- concerned
Traduction française : inquiéter - concerner 

Affirmation 	
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I'd concern
you'd concern
she'd concern
we'd concern
you'd concern
they'd concern 	I'd be concerning
you'd be concerning
she'd be concerning
we'd be concerning
you'd be concerning
they'd be concerning	I should've concerned
you should've concerned
she should've concerned
we should've concerned
you should've concerned
they should've concerned	I should've been concerning
you should've been concerning
she should've been concerning
we should've been concerning
you should've been concerning
they should've been concerning	

Négation 	
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I shouldn't concern
you shouldn't concern
she shouldn't concern
we shouldn't concern
you shouldn't concern
they shouldn't concern 	I shouldn't be concerning
you shouldn't be concerning
she shouldn't be concerning
we shouldn't be concerning
you shouldn't be concerning
they shouldn't be concerning	I shouldn't have concerned
you shouldn't have concerned
she shouldn't have concerned
we shouldn't have concerned
you shouldn't have concerned
they shouldn't have concerned	I shouldn't have been concerning
you shouldn't have been concerning
she shouldn't have been concerning
we shouldn't have been concerning
you shouldn't have been concerning
they shouldn't have been concerning	

Forme interrogative 	
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should I concern?
should you concern?
should she concern?
should we concern?
should you concern?
should they concern? 	should I be concerning?
should you be concerning?
should she be concerning?
should we be concerning?
should you be concerning?
should they be concerning? 	should I have concerned?
should you have concerned?
should she have concerned?
should we have concerned?
should you have concerned?
should they have concerned? 	should I have been concerning?
should you have been concerning?
should she have been concerning?
should we have been concerning?
should you have been concerning?
should they have been concerning? 	

Forme interro-négative 	
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shouldn't I concern?
shouldn't you concern?
shouldn't she concern?
shouldn't we concern?
shouldn't you concern?
shouldn't they concern? 	shouldn't I be concerning?
shouldn't you be concerning?
shouldn't she be concerning?
shouldn't we be concerning?
shouldn't you be concerning?
shouldn't they be concerning? 	shouldn't I have concerned?
shouldn't you have concerned?
shouldn't she have concerned?
shouldn't we have concerned?
shouldn't you have concerned?
shouldn't they have concerned? 	shouldn't I have been concerning?
shouldn't you have been concerning?
shouldn't she have been concerning?
shouldn't we have been concerning?
shouldn't you have been concerning?
shouldn't they have been concerning?