English verb conjugation
OUGHT TO OCCUR

Regular verb: occur - occurred - occurred

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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