English verb conjugation
SHOULD OCCUR

Regular verb: occur - occurred - occurred

Affirmation

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

Negation

Simple form	V-ing form
I should not occur you should not occur he should not occur we should not occur you should not occur they should not occur	I should not be occurring you should not be occurring he should not be occurring we should not be occurring you should not be occurring they should not be occurring
Perfect	V-ing perfect
I should not have occurred you should not have occurred he should not have occurred we should not have occurred you should not have occurred they should not have occurred	I should not have been occurring you should not have been occurring he should not have been occurring we should not have been occurring you should not have been occurring they should not have been occurring

Interrogative form

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

Interro-negative form

Simple form	V-ing form
should I not occur? should you not occur? should he not occur? should we not occur? should you not occur? should they not occur?	should I not be occurring? should you not be occurring? should he not be occurring? should we not be occurring? should you not be occurring? should they not be occurring?
Perfect	V-ing perfect
should I not have occurred? should you not have occurred? should he not have occurred? should we not have occurred? should you not have occurred? should they not have occurred?	should I not have been occurring? should you not have been occurring? should he not have been occurring? should we not have been occurring? should you not have been occurring? should they not have been occurring?