I ought to prefertilize you ought to prefertilize he ought to prefertilize we ought to prefertilize you ought to prefertilize they ought to prefertilize
V-ing form
I ought to be prefertilizing you ought to be prefertilizing he ought to be prefertilizing we ought to be prefertilizing you ought to be prefertilizing they ought to be prefertilizing
Perfect
I ought to have prefertilized you ought to have prefertilized he ought to have prefertilized we ought to have prefertilized you ought to have prefertilized they ought to have prefertilized
V-ing perfect
I ought to have been prefertilizing you ought to have been prefertilizing he ought to have been prefertilizing we ought to have been prefertilizing you ought to have been prefertilizing they ought to have been prefertilizing
Negation
Simple form
I oughtn't to prefertilize you oughtn't to prefertilize he oughtn't to prefertilize we oughtn't to prefertilize you oughtn't to prefertilize they oughtn't to prefertilize
V-ing form
I oughtn't to be prefertilizing you oughtn't to be prefertilizing he oughtn't to be prefertilizing we oughtn't to be prefertilizing you oughtn't to be prefertilizing they oughtn't to be prefertilizing
Perfect
I oughtn't to have prefertilized you oughtn't to have prefertilized he oughtn't to have prefertilized we oughtn't to have prefertilized you oughtn't to have prefertilized they oughtn't to have prefertilized
V-ing perfect
I oughtn't to have been prefertilizing you oughtn't to have been prefertilizing he oughtn't to have been prefertilizing we oughtn't to have been prefertilizing you oughtn't to have been prefertilizing they oughtn't to have been prefertilizing
Interrogative form
Simple form
ought to I prefertilize? ought to you prefertilize? ought to he prefertilize? ought to we prefertilize? ought to you prefertilize? ought to they prefertilize?
V-ing form
ought to I be prefertilizing? ought to you be prefertilizing? ought to he be prefertilizing? ought to we be prefertilizing? ought to you be prefertilizing? ought to they be prefertilizing?
Perfect
ought to I have prefertilized? ought to you have prefertilized? ought to he have prefertilized? ought to we have prefertilized? ought to you have prefertilized? ought to they have prefertilized?
V-ing perfect
ought to I have been prefertilizing? ought to you have been prefertilizing? ought to he have been prefertilizing? ought to we have been prefertilizing? ought to you have been prefertilizing? ought to they have been prefertilizing?
Interro-negative form
Simple form
oughtn't I to prefertilize? oughtn't you to prefertilize? oughtn't he to prefertilize? oughtn't we to prefertilize? oughtn't you to prefertilize? oughtn't they to prefertilize?
V-ing form
oughtn't I to be prefertilizing? oughtn't you to be prefertilizing? oughtn't he to be prefertilizing? oughtn't we to be prefertilizing? oughtn't you to be prefertilizing? oughtn't they to be prefertilizing?
Perfect
oughtn't I to have prefertilized? oughtn't you to have prefertilized? oughtn't he to have prefertilized? oughtn't we to have prefertilized? oughtn't you to have prefertilized? oughtn't they to have prefertilized?
V-ing perfect
oughtn't I to have been prefertilizing? oughtn't you to have been prefertilizing? oughtn't he to have been prefertilizing? oughtn't we to have been prefertilizing? oughtn't you to have been prefertilizing? oughtn't they to have been prefertilizing?