should retain
Regular verb: retain - retained- retained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd retain
you'd retain
she'd retain
we'd retain
you'd retain
they'd retain 	I'd be retaining
you'd be retaining
she'd be retaining
we'd be retaining
you'd be retaining
they'd be retaining	I should've retained
you should've retained
she should've retained
we should've retained
you should've retained
they should've retained	I should've been retaining
you should've been retaining
she should've been retaining
we should've been retaining
you should've been retaining
they should've been retaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't retain
you shouldn't retain
she shouldn't retain
we shouldn't retain
you shouldn't retain
they shouldn't retain 	I shouldn't be retaining
you shouldn't be retaining
she shouldn't be retaining
we shouldn't be retaining
you shouldn't be retaining
they shouldn't be retaining	I shouldn't have retained
you shouldn't have retained
she shouldn't have retained
we shouldn't have retained
you shouldn't have retained
they shouldn't have retained	I shouldn't have been retaining
you shouldn't have been retaining
she shouldn't have been retaining
we shouldn't have been retaining
you shouldn't have been retaining
they shouldn't have been retaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I retain?
should you retain?
should she retain?
should we retain?
should you retain?
should they retain? 	should I be retaining?
should you be retaining?
should she be retaining?
should we be retaining?
should you be retaining?
should they be retaining? 	should I have retained?
should you have retained?
should she have retained?
should we have retained?
should you have retained?
should they have retained? 	should I have been retaining?
should you have been retaining?
should she have been retaining?
should we have been retaining?
should you have been retaining?
should they have been retaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I retain?
shouldn't you retain?
shouldn't she retain?
shouldn't we retain?
shouldn't you retain?
shouldn't they retain? 	shouldn't I be retaining?
shouldn't you be retaining?
shouldn't she be retaining?
shouldn't we be retaining?
shouldn't you be retaining?
shouldn't they be retaining? 	shouldn't I have retained?
shouldn't you have retained?
shouldn't she have retained?
shouldn't we have retained?
shouldn't you have retained?
shouldn't they have retained? 	shouldn't I have been retaining?
shouldn't you have been retaining?
shouldn't she have been retaining?
shouldn't we have been retaining?
shouldn't you have been retaining?
shouldn't they have been retaining?