should preinvestigate
Verbe régulier : preinvestigate - preinvestigated- preinvestigated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I'd preinvestigate
you'd preinvestigate
she'd preinvestigate
we'd preinvestigate
you'd preinvestigate
they'd preinvestigate 	I'd be preinvestigating
you'd be preinvestigating
she'd be preinvestigating
we'd be preinvestigating
you'd be preinvestigating
they'd be preinvestigating	I should've preinvestigated
you should've preinvestigated
she should've preinvestigated
we should've preinvestigated
you should've preinvestigated
they should've preinvestigated	I should've been preinvestigating
you should've been preinvestigating
she should've been preinvestigating
we should've been preinvestigating
you should've been preinvestigating
they should've been preinvestigating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I shouldn't preinvestigate
you shouldn't preinvestigate
she shouldn't preinvestigate
we shouldn't preinvestigate
you shouldn't preinvestigate
they shouldn't preinvestigate 	I shouldn't be preinvestigating
you shouldn't be preinvestigating
she shouldn't be preinvestigating
we shouldn't be preinvestigating
you shouldn't be preinvestigating
they shouldn't be preinvestigating	I shouldn't have preinvestigated
you shouldn't have preinvestigated
she shouldn't have preinvestigated
we shouldn't have preinvestigated
you shouldn't have preinvestigated
they shouldn't have preinvestigated	I shouldn't have been preinvestigating
you shouldn't have been preinvestigating
she shouldn't have been preinvestigating
we shouldn't have been preinvestigating
you shouldn't have been preinvestigating
they shouldn't have been preinvestigating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I preinvestigate?
should you preinvestigate?
should she preinvestigate?
should we preinvestigate?
should you preinvestigate?
should they preinvestigate? 	should I be preinvestigating?
should you be preinvestigating?
should she be preinvestigating?
should we be preinvestigating?
should you be preinvestigating?
should they be preinvestigating? 	should I have preinvestigated?
should you have preinvestigated?
should she have preinvestigated?
should we have preinvestigated?
should you have preinvestigated?
should they have preinvestigated? 	should I have been preinvestigating?
should you have been preinvestigating?
should she have been preinvestigating?
should we have been preinvestigating?
should you have been preinvestigating?
should they have been preinvestigating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
shouldn't I preinvestigate?
shouldn't you preinvestigate?
shouldn't she preinvestigate?
shouldn't we preinvestigate?
shouldn't you preinvestigate?
shouldn't they preinvestigate? 	shouldn't I be preinvestigating?
shouldn't you be preinvestigating?
shouldn't she be preinvestigating?
shouldn't we be preinvestigating?
shouldn't you be preinvestigating?
shouldn't they be preinvestigating? 	shouldn't I have preinvestigated?
shouldn't you have preinvestigated?
shouldn't she have preinvestigated?
shouldn't we have preinvestigated?
shouldn't you have preinvestigated?
shouldn't they have preinvestigated? 	shouldn't I have been preinvestigating?
shouldn't you have been preinvestigating?
shouldn't she have been preinvestigating?
shouldn't we have been preinvestigating?
shouldn't you have been preinvestigating?
shouldn't they have been preinvestigating?