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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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?