English verb conjugation
MAY CATALYSE

Regular verb: catalyse - catalysed - catalysed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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