should sham
Regular verb: sham - shammed- shammed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd sham
you'd sham
he'd sham
we'd sham
you'd sham
they'd sham 	I'd be shamming
you'd be shamming
he'd be shamming
we'd be shamming
you'd be shamming
they'd be shamming	I should've shammed
you should've shammed
he should've shammed
we should've shammed
you should've shammed
they should've shammed	I should've been shamming
you should've been shamming
he should've been shamming
we should've been shamming
you should've been shamming
they should've been shamming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't sham
you shouldn't sham
he shouldn't sham
we shouldn't sham
you shouldn't sham
they shouldn't sham 	I shouldn't be shamming
you shouldn't be shamming
he shouldn't be shamming
we shouldn't be shamming
you shouldn't be shamming
they shouldn't be shamming	I shouldn't have shammed
you shouldn't have shammed
he shouldn't have shammed
we shouldn't have shammed
you shouldn't have shammed
they shouldn't have shammed	I shouldn't have been shamming
you shouldn't have been shamming
he shouldn't have been shamming
we shouldn't have been shamming
you shouldn't have been shamming
they shouldn't have been shamming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I sham?
should you sham?
should he sham?
should we sham?
should you sham?
should they sham? 	should I be shamming?
should you be shamming?
should he be shamming?
should we be shamming?
should you be shamming?
should they be shamming? 	should I have shammed?
should you have shammed?
should he have shammed?
should we have shammed?
should you have shammed?
should they have shammed? 	should I have been shamming?
should you have been shamming?
should he have been shamming?
should we have been shamming?
should you have been shamming?
should they have been shamming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I sham?
shouldn't you sham?
shouldn't he sham?
shouldn't we sham?
shouldn't you sham?
shouldn't they sham? 	shouldn't I be shamming?
shouldn't you be shamming?
shouldn't he be shamming?
shouldn't we be shamming?
shouldn't you be shamming?
shouldn't they be shamming? 	shouldn't I have shammed?
shouldn't you have shammed?
shouldn't he have shammed?
shouldn't we have shammed?
shouldn't you have shammed?
shouldn't they have shammed? 	shouldn't I have been shamming?
shouldn't you have been shamming?
shouldn't he have been shamming?
shouldn't we have been shamming?
shouldn't you have been shamming?
shouldn't they have been shamming?