should catalyse
Regular verb: catalyse - catalysed- catalysed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd catalyse
you'd catalyse
he'd catalyse
we'd catalyse
you'd catalyse
they'd catalyse 	I'd be catalysing
you'd be catalysing
he'd be catalysing
we'd be catalysing
you'd be catalysing
they'd be catalysing	I should've catalysed
you should've catalysed
he should've catalysed
we should've catalysed
you should've catalysed
they should've catalysed	I should've been catalysing
you should've been catalysing
he should've been catalysing
we should've been catalysing
you should've been catalysing
they should've been catalysing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't catalyse
you shouldn't catalyse
he shouldn't catalyse
we shouldn't catalyse
you shouldn't catalyse
they shouldn't catalyse 	I shouldn't be catalysing
you shouldn't be catalysing
he shouldn't be catalysing
we shouldn't be catalysing
you shouldn't be catalysing
they shouldn't be catalysing	I shouldn't have catalysed
you shouldn't have catalysed
he shouldn't have catalysed
we shouldn't have catalysed
you shouldn't have catalysed
they shouldn't have catalysed	I shouldn't have been catalysing
you shouldn't have been catalysing
he shouldn't have been catalysing
we shouldn't have been catalysing
you shouldn't have been catalysing
they shouldn't have been catalysing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I catalyse?
should you catalyse?
should he catalyse?
should we catalyse?
should you catalyse?
should they catalyse? 	should I be catalysing?
should you be catalysing?
should he be catalysing?
should we be catalysing?
should you be catalysing?
should they be catalysing? 	should I have catalysed?
should you have catalysed?
should he have catalysed?
should we have catalysed?
should you have catalysed?
should they have catalysed? 	should I have been catalysing?
should you have been catalysing?
should he have been catalysing?
should we have been catalysing?
should you have been catalysing?
should they have been catalysing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I catalyse?
shouldn't you catalyse?
shouldn't he catalyse?
shouldn't we catalyse?
shouldn't you catalyse?
shouldn't they catalyse? 	shouldn't I be catalysing?
shouldn't you be catalysing?
shouldn't he be catalysing?
shouldn't we be catalysing?
shouldn't you be catalysing?
shouldn't they be catalysing? 	shouldn't I have catalysed?
shouldn't you have catalysed?
shouldn't he have catalysed?
shouldn't we have catalysed?
shouldn't you have catalysed?
shouldn't they have catalysed? 	shouldn't I have been catalysing?
shouldn't you have been catalysing?
shouldn't he have been catalysing?
shouldn't we have been catalysing?
shouldn't you have been catalysing?
shouldn't they have been catalysing?