should shorten
Regular verb: shorten - shortened- shortened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd shorten
you'd shorten
she'd shorten
we'd shorten
you'd shorten
they'd shorten 	I'd be shortening
you'd be shortening
she'd be shortening
we'd be shortening
you'd be shortening
they'd be shortening	I should've shortened
you should've shortened
she should've shortened
we should've shortened
you should've shortened
they should've shortened	I should've been shortening
you should've been shortening
she should've been shortening
we should've been shortening
you should've been shortening
they should've been shortening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't shorten
you shouldn't shorten
she shouldn't shorten
we shouldn't shorten
you shouldn't shorten
they shouldn't shorten 	I shouldn't be shortening
you shouldn't be shortening
she shouldn't be shortening
we shouldn't be shortening
you shouldn't be shortening
they shouldn't be shortening	I shouldn't have shortened
you shouldn't have shortened
she shouldn't have shortened
we shouldn't have shortened
you shouldn't have shortened
they shouldn't have shortened	I shouldn't have been shortening
you shouldn't have been shortening
she shouldn't have been shortening
we shouldn't have been shortening
you shouldn't have been shortening
they shouldn't have been shortening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I shorten?
should you shorten?
should she shorten?
should we shorten?
should you shorten?
should they shorten? 	should I be shortening?
should you be shortening?
should she be shortening?
should we be shortening?
should you be shortening?
should they be shortening? 	should I have shortened?
should you have shortened?
should she have shortened?
should we have shortened?
should you have shortened?
should they have shortened? 	should I have been shortening?
should you have been shortening?
should she have been shortening?
should we have been shortening?
should you have been shortening?
should they have been shortening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I shorten?
shouldn't you shorten?
shouldn't she shorten?
shouldn't we shorten?
shouldn't you shorten?
shouldn't they shorten? 	shouldn't I be shortening?
shouldn't you be shortening?
shouldn't she be shortening?
shouldn't we be shortening?
shouldn't you be shortening?
shouldn't they be shortening? 	shouldn't I have shortened?
shouldn't you have shortened?
shouldn't she have shortened?
shouldn't we have shortened?
shouldn't you have shortened?
shouldn't they have shortened? 	shouldn't I have been shortening?
shouldn't you have been shortening?
shouldn't she have been shortening?
shouldn't we have been shortening?
shouldn't you have been shortening?
shouldn't they have been shortening?