should catalyse
Regular verb: catalyse - catalysed- catalysed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not catalyse
you should not catalyse
he should not catalyse
we should not catalyse
you should not catalyse
they should not catalyse 	I should not be catalysing
you should not be catalysing
he should not be catalysing
we should not be catalysing
you should not be catalysing
they should not be catalysing	I should not have catalysed
you should not have catalysed
he should not have catalysed
we should not have catalysed
you should not have catalysed
they should not have catalysed	I should not have been catalysing
you should not have been catalysing
he should not have been catalysing
we should not have been catalysing
you should not have been catalysing
they should not 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 	
should I not catalyse?
should you not catalyse?
should he not catalyse?
should we not catalyse?
should you not catalyse?
should they not catalyse? 	should I not be catalysing?
should you not be catalysing?
should he not be catalysing?
should we not be catalysing?
should you not be catalysing?
should they not be catalysing? 	should I not have catalysed?
should you not have catalysed?
should he not have catalysed?
should we not have catalysed?
should you not have catalysed?
should they not have catalysed? 	should I not have been catalysing?
should you not have been catalysing?
should he not have been catalysing?
should we not have been catalysing?
should you not have been catalysing?
should they not have been catalysing?