English verb conjugation
OUGHT TO PREWARN

Regular verb: prewarn - prewarned - prewarned

Affirmation

Simple form	V-ing form
I ought to prewarn you ought to prewarn she ought to prewarn we ought to prewarn you ought to prewarn they ought to prewarn	I ought to be prewarning you ought to be prewarning she ought to be prewarning we ought to be prewarning you ought to be prewarning they ought to be prewarning
Perfect	V-ing perfect
I ought to have prewarned you ought to have prewarned she ought to have prewarned we ought to have prewarned you ought to have prewarned they ought to have prewarned	I ought to have been prewarning you ought to have been prewarning she ought to have been prewarning we ought to have been prewarning you ought to have been prewarning they ought to have been prewarning

Negation

Simple form	V-ing form
I oughtn't to prewarn you oughtn't to prewarn she oughtn't to prewarn we oughtn't to prewarn you oughtn't to prewarn they oughtn't to prewarn	I oughtn't to be prewarning you oughtn't to be prewarning she oughtn't to be prewarning we oughtn't to be prewarning you oughtn't to be prewarning they oughtn't to be prewarning
Perfect	V-ing perfect
I oughtn't to have prewarned you oughtn't to have prewarned she oughtn't to have prewarned we oughtn't to have prewarned you oughtn't to have prewarned they oughtn't to have prewarned	I oughtn't to have been prewarning you oughtn't to have been prewarning she oughtn't to have been prewarning we oughtn't to have been prewarning you oughtn't to have been prewarning they oughtn't to have been prewarning

Interrogative form

Simple form	V-ing form
ought to I prewarn? ought to you prewarn? ought to she prewarn? ought to we prewarn? ought to you prewarn? ought to they prewarn?	ought to I be prewarning? ought to you be prewarning? ought to she be prewarning? ought to we be prewarning? ought to you be prewarning? ought to they be prewarning?
Perfect	V-ing perfect
ought to I have prewarned? ought to you have prewarned? ought to she have prewarned? ought to we have prewarned? ought to you have prewarned? ought to they have prewarned?	ought to I have been prewarning? ought to you have been prewarning? ought to she have been prewarning? ought to we have been prewarning? ought to you have been prewarning? ought to they have been prewarning?

Interro-negative form

Simple form	V-ing form
oughtn't I to prewarn? oughtn't you to prewarn? oughtn't she to prewarn? oughtn't we to prewarn? oughtn't you to prewarn? oughtn't they to prewarn?	oughtn't I to be prewarning? oughtn't you to be prewarning? oughtn't she to be prewarning? oughtn't we to be prewarning? oughtn't you to be prewarning? oughtn't they to be prewarning?
Perfect	V-ing perfect
oughtn't I to have prewarned? oughtn't you to have prewarned? oughtn't she to have prewarned? oughtn't we to have prewarned? oughtn't you to have prewarned? oughtn't they to have prewarned?	oughtn't I to have been prewarning? oughtn't you to have been prewarning? oughtn't she to have been prewarning? oughtn't we to have been prewarning? oughtn't you to have been prewarning? oughtn't they to have been prewarning?