should perseverate
Regular verb: perseverate - perseverated- perseverated

Affirmation 	
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I'd perseverate
you'd perseverate
she'd perseverate
we'd perseverate
you'd perseverate
they'd perseverate 	I'd be perseverating
you'd be perseverating
she'd be perseverating
we'd be perseverating
you'd be perseverating
they'd be perseverating	I should've perseverated
you should've perseverated
she should've perseverated
we should've perseverated
you should've perseverated
they should've perseverated	I should've been perseverating
you should've been perseverating
she should've been perseverating
we should've been perseverating
you should've been perseverating
they should've been perseverating	

Negation 	
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I shouldn't perseverate
you shouldn't perseverate
she shouldn't perseverate
we shouldn't perseverate
you shouldn't perseverate
they shouldn't perseverate 	I shouldn't be perseverating
you shouldn't be perseverating
she shouldn't be perseverating
we shouldn't be perseverating
you shouldn't be perseverating
they shouldn't be perseverating	I shouldn't have perseverated
you shouldn't have perseverated
she shouldn't have perseverated
we shouldn't have perseverated
you shouldn't have perseverated
they shouldn't have perseverated	I shouldn't have been perseverating
you shouldn't have been perseverating
she shouldn't have been perseverating
we shouldn't have been perseverating
you shouldn't have been perseverating
they shouldn't have been perseverating	

Interrogative form 	
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should I perseverate?
should you perseverate?
should she perseverate?
should we perseverate?
should you perseverate?
should they perseverate? 	should I be perseverating?
should you be perseverating?
should she be perseverating?
should we be perseverating?
should you be perseverating?
should they be perseverating? 	should I have perseverated?
should you have perseverated?
should she have perseverated?
should we have perseverated?
should you have perseverated?
should they have perseverated? 	should I have been perseverating?
should you have been perseverating?
should she have been perseverating?
should we have been perseverating?
should you have been perseverating?
should they have been perseverating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I perseverate?
shouldn't you perseverate?
shouldn't she perseverate?
shouldn't we perseverate?
shouldn't you perseverate?
shouldn't they perseverate? 	shouldn't I be perseverating?
shouldn't you be perseverating?
shouldn't she be perseverating?
shouldn't we be perseverating?
shouldn't you be perseverating?
shouldn't they be perseverating? 	shouldn't I have perseverated?
shouldn't you have perseverated?
shouldn't she have perseverated?
shouldn't we have perseverated?
shouldn't you have perseverated?
shouldn't they have perseverated? 	shouldn't I have been perseverating?
shouldn't you have been perseverating?
shouldn't she have been perseverating?
shouldn't we have been perseverating?
shouldn't you have been perseverating?
shouldn't they have been perseverating?