English verb conjugation
OUGHT TO SCRATCH

Regular verb: scratch - scratched - scratched

Affirmation

Simple form	V-ing form
I ought to scratch you ought to scratch he ought to scratch we ought to scratch you ought to scratch they ought to scratch	I ought to be scratching you ought to be scratching he ought to be scratching we ought to be scratching you ought to be scratching they ought to be scratching
Perfect	V-ing perfect
I ought to have scratched you ought to have scratched he ought to have scratched we ought to have scratched you ought to have scratched they ought to have scratched	I ought to have been scratching you ought to have been scratching he ought to have been scratching we ought to have been scratching you ought to have been scratching they ought to have been scratching

Negation

Simple form	V-ing form
I oughtn't to scratch you oughtn't to scratch he oughtn't to scratch we oughtn't to scratch you oughtn't to scratch they oughtn't to scratch	I oughtn't to be scratching you oughtn't to be scratching he oughtn't to be scratching we oughtn't to be scratching you oughtn't to be scratching they oughtn't to be scratching
Perfect	V-ing perfect
I oughtn't to have scratched you oughtn't to have scratched he oughtn't to have scratched we oughtn't to have scratched you oughtn't to have scratched they oughtn't to have scratched	I oughtn't to have been scratching you oughtn't to have been scratching he oughtn't to have been scratching we oughtn't to have been scratching you oughtn't to have been scratching they oughtn't to have been scratching

Interrogative form

Simple form	V-ing form
ought to I scratch? ought to you scratch? ought to he scratch? ought to we scratch? ought to you scratch? ought to they scratch?	ought to I be scratching? ought to you be scratching? ought to he be scratching? ought to we be scratching? ought to you be scratching? ought to they be scratching?
Perfect	V-ing perfect
ought to I have scratched? ought to you have scratched? ought to he have scratched? ought to we have scratched? ought to you have scratched? ought to they have scratched?	ought to I have been scratching? ought to you have been scratching? ought to he have been scratching? ought to we have been scratching? ought to you have been scratching? ought to they have been scratching?

Interro-negative form

Simple form	V-ing form
oughtn't I to scratch? oughtn't you to scratch? oughtn't he to scratch? oughtn't we to scratch? oughtn't you to scratch? oughtn't they to scratch?	oughtn't I to be scratching? oughtn't you to be scratching? oughtn't he to be scratching? oughtn't we to be scratching? oughtn't you to be scratching? oughtn't they to be scratching?
Perfect	V-ing perfect
oughtn't I to have scratched? oughtn't you to have scratched? oughtn't he to have scratched? oughtn't we to have scratched? oughtn't you to have scratched? oughtn't they to have scratched?	oughtn't I to have been scratching? oughtn't you to have been scratching? oughtn't he to have been scratching? oughtn't we to have been scratching? oughtn't you to have been scratching? oughtn't they to have been scratching?