should crumple
Regular verb: crumple - crumpled- crumpled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd crumple
you'd crumple
she'd crumple
we'd crumple
you'd crumple
they'd crumple 	I'd be crumpling
you'd be crumpling
she'd be crumpling
we'd be crumpling
you'd be crumpling
they'd be crumpling	I should've crumpled
you should've crumpled
she should've crumpled
we should've crumpled
you should've crumpled
they should've crumpled	I should've been crumpling
you should've been crumpling
she should've been crumpling
we should've been crumpling
you should've been crumpling
they should've been crumpling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't crumple
you shouldn't crumple
she shouldn't crumple
we shouldn't crumple
you shouldn't crumple
they shouldn't crumple 	I shouldn't be crumpling
you shouldn't be crumpling
she shouldn't be crumpling
we shouldn't be crumpling
you shouldn't be crumpling
they shouldn't be crumpling	I shouldn't have crumpled
you shouldn't have crumpled
she shouldn't have crumpled
we shouldn't have crumpled
you shouldn't have crumpled
they shouldn't have crumpled	I shouldn't have been crumpling
you shouldn't have been crumpling
she shouldn't have been crumpling
we shouldn't have been crumpling
you shouldn't have been crumpling
they shouldn't have been crumpling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I crumple?
should you crumple?
should she crumple?
should we crumple?
should you crumple?
should they crumple? 	should I be crumpling?
should you be crumpling?
should she be crumpling?
should we be crumpling?
should you be crumpling?
should they be crumpling? 	should I have crumpled?
should you have crumpled?
should she have crumpled?
should we have crumpled?
should you have crumpled?
should they have crumpled? 	should I have been crumpling?
should you have been crumpling?
should she have been crumpling?
should we have been crumpling?
should you have been crumpling?
should they have been crumpling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I crumple?
shouldn't you crumple?
shouldn't she crumple?
shouldn't we crumple?
shouldn't you crumple?
shouldn't they crumple? 	shouldn't I be crumpling?
shouldn't you be crumpling?
shouldn't she be crumpling?
shouldn't we be crumpling?
shouldn't you be crumpling?
shouldn't they be crumpling? 	shouldn't I have crumpled?
shouldn't you have crumpled?
shouldn't she have crumpled?
shouldn't we have crumpled?
shouldn't you have crumpled?
shouldn't they have crumpled? 	shouldn't I have been crumpling?
shouldn't you have been crumpling?
shouldn't she have been crumpling?
shouldn't we have been crumpling?
shouldn't you have been crumpling?
shouldn't they have been crumpling?