should accession
Regular verb: accession - accessioned- accessioned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd accession
you'd accession
she'd accession
we'd accession
you'd accession
they'd accession 	I'd be accessioning
you'd be accessioning
she'd be accessioning
we'd be accessioning
you'd be accessioning
they'd be accessioning	I should've accessioned
you should've accessioned
she should've accessioned
we should've accessioned
you should've accessioned
they should've accessioned	I should've been accessioning
you should've been accessioning
she should've been accessioning
we should've been accessioning
you should've been accessioning
they should've been accessioning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't accession
you shouldn't accession
she shouldn't accession
we shouldn't accession
you shouldn't accession
they shouldn't accession 	I shouldn't be accessioning
you shouldn't be accessioning
she shouldn't be accessioning
we shouldn't be accessioning
you shouldn't be accessioning
they shouldn't be accessioning	I shouldn't have accessioned
you shouldn't have accessioned
she shouldn't have accessioned
we shouldn't have accessioned
you shouldn't have accessioned
they shouldn't have accessioned	I shouldn't have been accessioning
you shouldn't have been accessioning
she shouldn't have been accessioning
we shouldn't have been accessioning
you shouldn't have been accessioning
they shouldn't have been accessioning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I accession?
should you accession?
should she accession?
should we accession?
should you accession?
should they accession? 	should I be accessioning?
should you be accessioning?
should she be accessioning?
should we be accessioning?
should you be accessioning?
should they be accessioning? 	should I have accessioned?
should you have accessioned?
should she have accessioned?
should we have accessioned?
should you have accessioned?
should they have accessioned? 	should I have been accessioning?
should you have been accessioning?
should she have been accessioning?
should we have been accessioning?
should you have been accessioning?
should they have been accessioning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I accession?
shouldn't you accession?
shouldn't she accession?
shouldn't we accession?
shouldn't you accession?
shouldn't they accession? 	shouldn't I be accessioning?
shouldn't you be accessioning?
shouldn't she be accessioning?
shouldn't we be accessioning?
shouldn't you be accessioning?
shouldn't they be accessioning? 	shouldn't I have accessioned?
shouldn't you have accessioned?
shouldn't she have accessioned?
shouldn't we have accessioned?
shouldn't you have accessioned?
shouldn't they have accessioned? 	shouldn't I have been accessioning?
shouldn't you have been accessioning?
shouldn't she have been accessioning?
shouldn't we have been accessioning?
shouldn't you have been accessioning?
shouldn't they have been accessioning?