English verb conjugation
OUGHT TO TIFF

Regular verb: tiff - tiffed - tiffed

Affirmation

Simple form	V-ing form
I ought to tiff you ought to tiff she ought to tiff we ought to tiff you ought to tiff they ought to tiff	I ought to be tiffing you ought to be tiffing she ought to be tiffing we ought to be tiffing you ought to be tiffing they ought to be tiffing
Perfect	V-ing perfect
I ought to have tiffed you ought to have tiffed she ought to have tiffed we ought to have tiffed you ought to have tiffed they ought to have tiffed	I ought to have been tiffing you ought to have been tiffing she ought to have been tiffing we ought to have been tiffing you ought to have been tiffing they ought to have been tiffing

Negation

Simple form	V-ing form
I oughtn't to tiff you oughtn't to tiff she oughtn't to tiff we oughtn't to tiff you oughtn't to tiff they oughtn't to tiff	I oughtn't to be tiffing you oughtn't to be tiffing she oughtn't to be tiffing we oughtn't to be tiffing you oughtn't to be tiffing they oughtn't to be tiffing
Perfect	V-ing perfect
I oughtn't to have tiffed you oughtn't to have tiffed she oughtn't to have tiffed we oughtn't to have tiffed you oughtn't to have tiffed they oughtn't to have tiffed	I oughtn't to have been tiffing you oughtn't to have been tiffing she oughtn't to have been tiffing we oughtn't to have been tiffing you oughtn't to have been tiffing they oughtn't to have been tiffing

Interrogative form

Simple form	V-ing form
ought to I tiff? ought to you tiff? ought to she tiff? ought to we tiff? ought to you tiff? ought to they tiff?	ought to I be tiffing? ought to you be tiffing? ought to she be tiffing? ought to we be tiffing? ought to you be tiffing? ought to they be tiffing?
Perfect	V-ing perfect
ought to I have tiffed? ought to you have tiffed? ought to she have tiffed? ought to we have tiffed? ought to you have tiffed? ought to they have tiffed?	ought to I have been tiffing? ought to you have been tiffing? ought to she have been tiffing? ought to we have been tiffing? ought to you have been tiffing? ought to they have been tiffing?

Interro-negative form

Simple form	V-ing form
oughtn't I to tiff? oughtn't you to tiff? oughtn't she to tiff? oughtn't we to tiff? oughtn't you to tiff? oughtn't they to tiff?	oughtn't I to be tiffing? oughtn't you to be tiffing? oughtn't she to be tiffing? oughtn't we to be tiffing? oughtn't you to be tiffing? oughtn't they to be tiffing?
Perfect	V-ing perfect
oughtn't I to have tiffed? oughtn't you to have tiffed? oughtn't she to have tiffed? oughtn't we to have tiffed? oughtn't you to have tiffed? oughtn't they to have tiffed?	oughtn't I to have been tiffing? oughtn't you to have been tiffing? oughtn't she to have been tiffing? oughtn't we to have been tiffing? oughtn't you to have been tiffing? oughtn't they to have been tiffing?