English verb conjugation
OUGHT TO FELL

Regular verb: fell - felled - felled

Affirmation

Simple form	V-ing form
I ought to fell you ought to fell he ought to fell we ought to fell you ought to fell they ought to fell	I ought to be felling you ought to be felling he ought to be felling we ought to be felling you ought to be felling they ought to be felling
Perfect	V-ing perfect
I ought to have felled you ought to have felled he ought to have felled we ought to have felled you ought to have felled they ought to have felled	I ought to have been felling you ought to have been felling he ought to have been felling we ought to have been felling you ought to have been felling they ought to have been felling

Negation

Simple form	V-ing form
I oughtn't to fell you oughtn't to fell he oughtn't to fell we oughtn't to fell you oughtn't to fell they oughtn't to fell	I oughtn't to be felling you oughtn't to be felling he oughtn't to be felling we oughtn't to be felling you oughtn't to be felling they oughtn't to be felling
Perfect	V-ing perfect
I oughtn't to have felled you oughtn't to have felled he oughtn't to have felled we oughtn't to have felled you oughtn't to have felled they oughtn't to have felled	I oughtn't to have been felling you oughtn't to have been felling he oughtn't to have been felling we oughtn't to have been felling you oughtn't to have been felling they oughtn't to have been felling

Interrogative form

Simple form	V-ing form
ought to I fell? ought to you fell? ought to he fell? ought to we fell? ought to you fell? ought to they fell?	ought to I be felling? ought to you be felling? ought to he be felling? ought to we be felling? ought to you be felling? ought to they be felling?
Perfect	V-ing perfect
ought to I have felled? ought to you have felled? ought to he have felled? ought to we have felled? ought to you have felled? ought to they have felled?	ought to I have been felling? ought to you have been felling? ought to he have been felling? ought to we have been felling? ought to you have been felling? ought to they have been felling?

Interro-negative form

Simple form	V-ing form
oughtn't I to fell? oughtn't you to fell? oughtn't he to fell? oughtn't we to fell? oughtn't you to fell? oughtn't they to fell?	oughtn't I to be felling? oughtn't you to be felling? oughtn't he to be felling? oughtn't we to be felling? oughtn't you to be felling? oughtn't they to be felling?
Perfect	V-ing perfect
oughtn't I to have felled? oughtn't you to have felled? oughtn't he to have felled? oughtn't we to have felled? oughtn't you to have felled? oughtn't they to have felled?	oughtn't I to have been felling? oughtn't you to have been felling? oughtn't he to have been felling? oughtn't we to have been felling? oughtn't you to have been felling? oughtn't they to have been felling?