English verb conjugation
OUGHT TO STEM

Regular verb: stem - stemmed - stemmed

Affirmation

Simple form	V-ing form
I ought to stem you ought to stem she ought to stem we ought to stem you ought to stem they ought to stem	I ought to be stemming you ought to be stemming she ought to be stemming we ought to be stemming you ought to be stemming they ought to be stemming
Perfect	V-ing perfect
I ought to have stemmed you ought to have stemmed she ought to have stemmed we ought to have stemmed you ought to have stemmed they ought to have stemmed	I ought to have been stemming you ought to have been stemming she ought to have been stemming we ought to have been stemming you ought to have been stemming they ought to have been stemming

Negation

Simple form	V-ing form
I oughtn't to stem you oughtn't to stem she oughtn't to stem we oughtn't to stem you oughtn't to stem they oughtn't to stem	I oughtn't to be stemming you oughtn't to be stemming she oughtn't to be stemming we oughtn't to be stemming you oughtn't to be stemming they oughtn't to be stemming
Perfect	V-ing perfect
I oughtn't to have stemmed you oughtn't to have stemmed she oughtn't to have stemmed we oughtn't to have stemmed you oughtn't to have stemmed they oughtn't to have stemmed	I oughtn't to have been stemming you oughtn't to have been stemming she oughtn't to have been stemming we oughtn't to have been stemming you oughtn't to have been stemming they oughtn't to have been stemming

Interrogative form

Simple form	V-ing form
ought to I stem? ought to you stem? ought to she stem? ought to we stem? ought to you stem? ought to they stem?	ought to I be stemming? ought to you be stemming? ought to she be stemming? ought to we be stemming? ought to you be stemming? ought to they be stemming?
Perfect	V-ing perfect
ought to I have stemmed? ought to you have stemmed? ought to she have stemmed? ought to we have stemmed? ought to you have stemmed? ought to they have stemmed?	ought to I have been stemming? ought to you have been stemming? ought to she have been stemming? ought to we have been stemming? ought to you have been stemming? ought to they have been stemming?

Interro-negative form

Simple form	V-ing form
oughtn't I to stem? oughtn't you to stem? oughtn't she to stem? oughtn't we to stem? oughtn't you to stem? oughtn't they to stem?	oughtn't I to be stemming? oughtn't you to be stemming? oughtn't she to be stemming? oughtn't we to be stemming? oughtn't you to be stemming? oughtn't they to be stemming?
Perfect	V-ing perfect
oughtn't I to have stemmed? oughtn't you to have stemmed? oughtn't she to have stemmed? oughtn't we to have stemmed? oughtn't you to have stemmed? oughtn't they to have stemmed?	oughtn't I to have been stemming? oughtn't you to have been stemming? oughtn't she to have been stemming? oughtn't we to have been stemming? oughtn't you to have been stemming? oughtn't they to have been stemming?