can catalyse
Regular verb: catalyse - catalysed- catalysed

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

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

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

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