English verb conjugation
OUGHT TO SKETCH

Regular verb: sketch - sketched - sketched

Affirmation

Simple form	V-ing form
I ought to sketch you ought to sketch he ought to sketch we ought to sketch you ought to sketch they ought to sketch	I ought to be sketching you ought to be sketching he ought to be sketching we ought to be sketching you ought to be sketching they ought to be sketching
Perfect	V-ing perfect
I ought to have sketched you ought to have sketched he ought to have sketched we ought to have sketched you ought to have sketched they ought to have sketched	I ought to have been sketching you ought to have been sketching he ought to have been sketching we ought to have been sketching you ought to have been sketching they ought to have been sketching

Negation

Simple form	V-ing form
I oughtn't to sketch you oughtn't to sketch he oughtn't to sketch we oughtn't to sketch you oughtn't to sketch they oughtn't to sketch	I oughtn't to be sketching you oughtn't to be sketching he oughtn't to be sketching we oughtn't to be sketching you oughtn't to be sketching they oughtn't to be sketching
Perfect	V-ing perfect
I oughtn't to have sketched you oughtn't to have sketched he oughtn't to have sketched we oughtn't to have sketched you oughtn't to have sketched they oughtn't to have sketched	I oughtn't to have been sketching you oughtn't to have been sketching he oughtn't to have been sketching we oughtn't to have been sketching you oughtn't to have been sketching they oughtn't to have been sketching

Interrogative form

Simple form	V-ing form
ought to I sketch? ought to you sketch? ought to he sketch? ought to we sketch? ought to you sketch? ought to they sketch?	ought to I be sketching? ought to you be sketching? ought to he be sketching? ought to we be sketching? ought to you be sketching? ought to they be sketching?
Perfect	V-ing perfect
ought to I have sketched? ought to you have sketched? ought to he have sketched? ought to we have sketched? ought to you have sketched? ought to they have sketched?	ought to I have been sketching? ought to you have been sketching? ought to he have been sketching? ought to we have been sketching? ought to you have been sketching? ought to they have been sketching?

Interro-negative form

Simple form	V-ing form
oughtn't I to sketch? oughtn't you to sketch? oughtn't he to sketch? oughtn't we to sketch? oughtn't you to sketch? oughtn't they to sketch?	oughtn't I to be sketching? oughtn't you to be sketching? oughtn't he to be sketching? oughtn't we to be sketching? oughtn't you to be sketching? oughtn't they to be sketching?
Perfect	V-ing perfect
oughtn't I to have sketched? oughtn't you to have sketched? oughtn't he to have sketched? oughtn't we to have sketched? oughtn't you to have sketched? oughtn't they to have sketched?	oughtn't I to have been sketching? oughtn't you to have been sketching? oughtn't he to have been sketching? oughtn't we to have been sketching? oughtn't you to have been sketching? oughtn't they to have been sketching?