English verb conjugation
MUST CATALYZE

Regular verb: catalyze - catalyzed - catalyzed

Affirmation

Simple form	V-ing form
I must catalyze you must catalyze he must catalyze we must catalyze you must catalyze they must catalyze	I must be catalyzing you must be catalyzing he must be catalyzing we must be catalyzing you must be catalyzing they must be catalyzing
Perfect	V-ing perfect
I must have catalyzed you must have catalyzed he must have catalyzed we must have catalyzed you must have catalyzed they must have catalyzed	I must have been catalyzing you must have been catalyzing he must have been catalyzing we must have been catalyzing you must have been catalyzing they must have been catalyzing

Negation

Simple form	V-ing form
I must not catalyze you must not catalyze he must not catalyze we must not catalyze you must not catalyze they must not catalyze	I must not be catalyzing you must not be catalyzing he must not be catalyzing we must not be catalyzing you must not be catalyzing they must not be catalyzing
Perfect	V-ing perfect
I must not have catalyzed you must not have catalyzed he must not have catalyzed we must not have catalyzed you must not have catalyzed they must not have catalyzed	I must not have been catalyzing you must not have been catalyzing he must not have been catalyzing we must not have been catalyzing you must not have been catalyzing they must not have been catalyzing

Interrogative form

Simple form	V-ing form
must I catalyze? must you catalyze? must he catalyze? must we catalyze? must you catalyze? must they catalyze?	must I be catalyzing? must you be catalyzing? must he be catalyzing? must we be catalyzing? must you be catalyzing? must they be catalyzing?
Perfect	V-ing perfect
must I have catalyzed? must you have catalyzed? must he have catalyzed? must we have catalyzed? must you have catalyzed? must they have catalyzed?	must I have been catalyzing? must you have been catalyzing? must he have been catalyzing? must we have been catalyzing? must you have been catalyzing? must they have been catalyzing?

Interro-negative form

Simple form	V-ing form
must I not catalyze? must you not catalyze? must he not catalyze? must we not catalyze? must you not catalyze? must they not catalyze?	must I not be catalyzing? must you not be catalyzing? must he not be catalyzing? must we not be catalyzing? must you not be catalyzing? must they not be catalyzing?
Perfect	V-ing perfect
must I not have catalyzed? must you not have catalyzed? must he not have catalyzed? must we not have catalyzed? must you not have catalyzed? must they not have catalyzed?	must I not have been catalyzing? must you not have been catalyzing? must he not have been catalyzing? must we not have been catalyzing? must you not have been catalyzing? must they not have been catalyzing?