should ascertain
Verbe régulier : ascertain - ascertained- ascertained
Traduction française : établir - constater 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I'd ascertain
you'd ascertain
she'd ascertain
we'd ascertain
you'd ascertain
they'd ascertain 	I'd be ascertaining
you'd be ascertaining
she'd be ascertaining
we'd be ascertaining
you'd be ascertaining
they'd be ascertaining	I should've ascertained
you should've ascertained
she should've ascertained
we should've ascertained
you should've ascertained
they should've ascertained	I should've been ascertaining
you should've been ascertaining
she should've been ascertaining
we should've been ascertaining
you should've been ascertaining
they should've been ascertaining	

Négation 	
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I shouldn't ascertain
you shouldn't ascertain
she shouldn't ascertain
we shouldn't ascertain
you shouldn't ascertain
they shouldn't ascertain 	I shouldn't be ascertaining
you shouldn't be ascertaining
she shouldn't be ascertaining
we shouldn't be ascertaining
you shouldn't be ascertaining
they shouldn't be ascertaining	I shouldn't have ascertained
you shouldn't have ascertained
she shouldn't have ascertained
we shouldn't have ascertained
you shouldn't have ascertained
they shouldn't have ascertained	I shouldn't have been ascertaining
you shouldn't have been ascertaining
she shouldn't have been ascertaining
we shouldn't have been ascertaining
you shouldn't have been ascertaining
they shouldn't have been ascertaining	

Forme interrogative 	
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should I ascertain?
should you ascertain?
should she ascertain?
should we ascertain?
should you ascertain?
should they ascertain? 	should I be ascertaining?
should you be ascertaining?
should she be ascertaining?
should we be ascertaining?
should you be ascertaining?
should they be ascertaining? 	should I have ascertained?
should you have ascertained?
should she have ascertained?
should we have ascertained?
should you have ascertained?
should they have ascertained? 	should I have been ascertaining?
should you have been ascertaining?
should she have been ascertaining?
should we have been ascertaining?
should you have been ascertaining?
should they have been ascertaining? 	

Forme interro-négative 	
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shouldn't I ascertain?
shouldn't you ascertain?
shouldn't she ascertain?
shouldn't we ascertain?
shouldn't you ascertain?
shouldn't they ascertain? 	shouldn't I be ascertaining?
shouldn't you be ascertaining?
shouldn't she be ascertaining?
shouldn't we be ascertaining?
shouldn't you be ascertaining?
shouldn't they be ascertaining? 	shouldn't I have ascertained?
shouldn't you have ascertained?
shouldn't she have ascertained?
shouldn't we have ascertained?
shouldn't you have ascertained?
shouldn't they have ascertained? 	shouldn't I have been ascertaining?
shouldn't you have been ascertaining?
shouldn't she have been ascertaining?
shouldn't we have been ascertaining?
shouldn't you have been ascertaining?
shouldn't they have been ascertaining?