English verb conjugation
OUGHT TO OBSERVE

Regular verb: observe - observed - observed

Affirmation

Simple form	V-ing form
I ought to observe you ought to observe he ought to observe we ought to observe you ought to observe they ought to observe	I ought to be observing you ought to be observing he ought to be observing we ought to be observing you ought to be observing they ought to be observing
Perfect	V-ing perfect
I ought to have observed you ought to have observed he ought to have observed we ought to have observed you ought to have observed they ought to have observed	I ought to have been observing you ought to have been observing he ought to have been observing we ought to have been observing you ought to have been observing they ought to have been observing

Negation

Simple form	V-ing form
I oughtn't to observe you oughtn't to observe he oughtn't to observe we oughtn't to observe you oughtn't to observe they oughtn't to observe	I oughtn't to be observing you oughtn't to be observing he oughtn't to be observing we oughtn't to be observing you oughtn't to be observing they oughtn't to be observing
Perfect	V-ing perfect
I oughtn't to have observed you oughtn't to have observed he oughtn't to have observed we oughtn't to have observed you oughtn't to have observed they oughtn't to have observed	I oughtn't to have been observing you oughtn't to have been observing he oughtn't to have been observing we oughtn't to have been observing you oughtn't to have been observing they oughtn't to have been observing

Interrogative form

Simple form	V-ing form
ought to I observe? ought to you observe? ought to he observe? ought to we observe? ought to you observe? ought to they observe?	ought to I be observing? ought to you be observing? ought to he be observing? ought to we be observing? ought to you be observing? ought to they be observing?
Perfect	V-ing perfect
ought to I have observed? ought to you have observed? ought to he have observed? ought to we have observed? ought to you have observed? ought to they have observed?	ought to I have been observing? ought to you have been observing? ought to he have been observing? ought to we have been observing? ought to you have been observing? ought to they have been observing?

Interro-negative form

Simple form	V-ing form
oughtn't I to observe? oughtn't you to observe? oughtn't he to observe? oughtn't we to observe? oughtn't you to observe? oughtn't they to observe?	oughtn't I to be observing? oughtn't you to be observing? oughtn't he to be observing? oughtn't we to be observing? oughtn't you to be observing? oughtn't they to be observing?
Perfect	V-ing perfect
oughtn't I to have observed? oughtn't you to have observed? oughtn't he to have observed? oughtn't we to have observed? oughtn't you to have observed? oughtn't they to have observed?	oughtn't I to have been observing? oughtn't you to have been observing? oughtn't he to have been observing? oughtn't we to have been observing? oughtn't you to have been observing? oughtn't they to have been observing?