English verb conjugation
MUST CATALYSE

Regular verb: catalyse - catalysed - catalysed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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