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 he 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 he 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 he 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 he 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 ought not to tiff you ought not to tiff he ought not to tiff we ought not to tiff you ought not to tiff they ought not to tiff	I ought not to tiffing you ought not to tiffing he ought not to tiffing we ought not to tiffing you ought not to tiffing they ought not to tiffing
Perfect	V-ing perfect
I ought not to have tiffed you ought not to have tiffed he ought not to have tiffed we ought not to have tiffed you ought not to have tiffed they ought not to have tiffed	I ought not to have been tiffing you ought not to have been tiffing he ought not to have been tiffing we ought not to have been tiffing you ought not to have been tiffing they ought not to have been tiffing

Interrogative form

Simple form	V-ing form
ought to I tiff? ought to you tiff? ought to he 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 he 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 he 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 he 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
ought I not to tiff? ought you not to tiff? ought he not to tiff? ought we not to tiff? ought you not to tiff? ought they not to tiff?	ought I not to be tiffing? ought you not to be tiffing? ought he not to be tiffing? ought we not to be tiffing? ought you not to be tiffing? ought they not to be tiffing?
Perfect	V-ing perfect
ought I not to have tiffed? ought you not to have tiffed? ought he not to have tiffed? ought we not to have tiffed? ought you not to have tiffed? ought they not to have tiffed?	ought I not to have been tiffing? ought you not to have been tiffing? ought he not to have been tiffing? ought we not to have been tiffing? ought you not to have been tiffing? ought they not to have been tiffing?