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 cannot catalyse you cannot catalyse he cannot catalyse we cannot catalyse you cannot catalyse they cannot catalyse	I cannot be catalysing you cannot be catalysing he cannot be catalysing we cannot be catalysing you cannot be catalysing they cannot be catalysing
Perfect	V-ing perfect
I cannot have catalysed you cannot have catalysed he cannot have catalysed we cannot have catalysed you cannot have catalysed they cannot have catalysed	I cannot have been catalysing you cannot have been catalysing he cannot have been catalysing we cannot have been catalysing you cannot have been catalysing they cannot 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 I not catalyse? can you not catalyse? can he not catalyse? can we not catalyse? can you not catalyse? can they not catalyse?	can I not be catalysing? can you not be catalysing? can he not be catalysing? can we not be catalysing? can you not be catalysing? can they not be catalysing?
Perfect	V-ing perfect
can I not have catalysed? can you not have catalysed? can he not have catalysed? can we not have catalysed? can you not have catalysed? can they not have catalysed?	can I not have been catalysing? can you not have been catalysing? can he not have been catalysing? can we not have been catalysing? can you not have been catalysing? can they not have been catalysing?