English verb conjugation
MAY OCCUR

Regular verb: occur - occurred - occurred

Affirmation

Simple form	V-ing form
I may occur you may occur she may occur we may occur you may occur they may occur	I may be occurring you may be occurring she may be occurring we may be occurring you may be occurring they may be occurring
Perfect	V-ing perfect
I may have occurred you may have occurred she may have occurred we may have occurred you may have occurred they may have occurred	I may have been occurring you may have been occurring she may have been occurring we may have been occurring you may have been occurring they may have been occurring

Negation

Simple form	V-ing form
I mayn't occur you mayn't occur she mayn't occur we mayn't occur you mayn't occur they mayn't occur	I mayn't be occurring you mayn't be occurring she mayn't be occurring we mayn't be occurring you mayn't be occurring they mayn't be occurring
Perfect	V-ing perfect
I mayn't have occurred you mayn't have occurred she mayn't have occurred we mayn't have occurred you mayn't have occurred they mayn't have occurred	I mayn't have been occurring you mayn't have been occurring she mayn't have been occurring we mayn't have been occurring you mayn't have been occurring they mayn't have been occurring

Interrogative form

Simple form	V-ing form
may I occur? may you occur? may she occur? may we occur? may you occur? may they occur?	may I be occurring? may you be occurring? may she be occurring? may we be occurring? may you be occurring? may they be occurring?
Perfect	V-ing perfect
may I have occurred? may you have occurred? may she have occurred? may we have occurred? may you have occurred? may they have occurred?	may I have been occurring? may you have been occurring? may she have been occurring? may we have been occurring? may you have been occurring? may they have been occurring?

Interro-negative form

Simple form	V-ing form
mayn't I occur? mayn't you occur? mayn't she occur? mayn't we occur? mayn't you occur? mayn't they occur?	mayn't I be occurring? mayn't you be occurring? mayn't she be occurring? mayn't we be occurring? mayn't you be occurring? mayn't they be occurring?
Perfect	V-ing perfect
mayn't I have occurred? mayn't you have occurred? mayn't she have occurred? mayn't we have occurred? mayn't you have occurred? mayn't they have occurred?	mayn't I have been occurring? mayn't you have been occurring? mayn't she have been occurring? mayn't we have been occurring? mayn't you have been occurring? mayn't they have been occurring?