English verb conjugation
CAN CATALYSE

Regular verb: catalyse - catalysed - catalysed

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
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
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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
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?
Perfect	V-ing perfect
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?