English verb conjugation
OUGHT TO PRESERVE

Regular verb: preserve - preserved - preserved

Affirmation

Simple form	V-ing form
I ought to preserve you ought to preserve he ought to preserve we ought to preserve you ought to preserve they ought to preserve	I ought to be preserving you ought to be preserving he ought to be preserving we ought to be preserving you ought to be preserving they ought to be preserving
Perfect	V-ing perfect
I ought to have preserved you ought to have preserved he ought to have preserved we ought to have preserved you ought to have preserved they ought to have preserved	I ought to have been preserving you ought to have been preserving he ought to have been preserving we ought to have been preserving you ought to have been preserving they ought to have been preserving

Negation

Simple form	V-ing form
I oughtn't to preserve you oughtn't to preserve he oughtn't to preserve we oughtn't to preserve you oughtn't to preserve they oughtn't to preserve	I oughtn't to be preserving you oughtn't to be preserving he oughtn't to be preserving we oughtn't to be preserving you oughtn't to be preserving they oughtn't to be preserving
Perfect	V-ing perfect
I oughtn't to have preserved you oughtn't to have preserved he oughtn't to have preserved we oughtn't to have preserved you oughtn't to have preserved they oughtn't to have preserved	I oughtn't to have been preserving you oughtn't to have been preserving he oughtn't to have been preserving we oughtn't to have been preserving you oughtn't to have been preserving they oughtn't to have been preserving

Interrogative form

Simple form	V-ing form
ought to I preserve? ought to you preserve? ought to he preserve? ought to we preserve? ought to you preserve? ought to they preserve?	ought to I be preserving? ought to you be preserving? ought to he be preserving? ought to we be preserving? ought to you be preserving? ought to they be preserving?
Perfect	V-ing perfect
ought to I have preserved? ought to you have preserved? ought to he have preserved? ought to we have preserved? ought to you have preserved? ought to they have preserved?	ought to I have been preserving? ought to you have been preserving? ought to he have been preserving? ought to we have been preserving? ought to you have been preserving? ought to they have been preserving?

Interro-negative form

Simple form	V-ing form
oughtn't I to preserve? oughtn't you to preserve? oughtn't he to preserve? oughtn't we to preserve? oughtn't you to preserve? oughtn't they to preserve?	oughtn't I to be preserving? oughtn't you to be preserving? oughtn't he to be preserving? oughtn't we to be preserving? oughtn't you to be preserving? oughtn't they to be preserving?
Perfect	V-ing perfect
oughtn't I to have preserved? oughtn't you to have preserved? oughtn't he to have preserved? oughtn't we to have preserved? oughtn't you to have preserved? oughtn't they to have preserved?	oughtn't I to have been preserving? oughtn't you to have been preserving? oughtn't he to have been preserving? oughtn't we to have been preserving? oughtn't you to have been preserving? oughtn't they to have been preserving?