English verb conjugation
OUGHT TO SKULK

Regular verb: skulk - skulked - skulked

Affirmation

Simple form	V-ing form
I ought to skulk you ought to skulk he ought to skulk we ought to skulk you ought to skulk they ought to skulk	I ought to be skulking you ought to be skulking he ought to be skulking we ought to be skulking you ought to be skulking they ought to be skulking
Perfect	V-ing perfect
I ought to have skulked you ought to have skulked he ought to have skulked we ought to have skulked you ought to have skulked they ought to have skulked	I ought to have been skulking you ought to have been skulking he ought to have been skulking we ought to have been skulking you ought to have been skulking they ought to have been skulking

Negation

Simple form	V-ing form
I oughtn't to skulk you oughtn't to skulk he oughtn't to skulk we oughtn't to skulk you oughtn't to skulk they oughtn't to skulk	I oughtn't to be skulking you oughtn't to be skulking he oughtn't to be skulking we oughtn't to be skulking you oughtn't to be skulking they oughtn't to be skulking
Perfect	V-ing perfect
I oughtn't to have skulked you oughtn't to have skulked he oughtn't to have skulked we oughtn't to have skulked you oughtn't to have skulked they oughtn't to have skulked	I oughtn't to have been skulking you oughtn't to have been skulking he oughtn't to have been skulking we oughtn't to have been skulking you oughtn't to have been skulking they oughtn't to have been skulking

Interrogative form

Simple form	V-ing form
ought to I skulk? ought to you skulk? ought to he skulk? ought to we skulk? ought to you skulk? ought to they skulk?	ought to I be skulking? ought to you be skulking? ought to he be skulking? ought to we be skulking? ought to you be skulking? ought to they be skulking?
Perfect	V-ing perfect
ought to I have skulked? ought to you have skulked? ought to he have skulked? ought to we have skulked? ought to you have skulked? ought to they have skulked?	ought to I have been skulking? ought to you have been skulking? ought to he have been skulking? ought to we have been skulking? ought to you have been skulking? ought to they have been skulking?

Interro-negative form

Simple form	V-ing form
oughtn't I to skulk? oughtn't you to skulk? oughtn't he to skulk? oughtn't we to skulk? oughtn't you to skulk? oughtn't they to skulk?	oughtn't I to be skulking? oughtn't you to be skulking? oughtn't he to be skulking? oughtn't we to be skulking? oughtn't you to be skulking? oughtn't they to be skulking?
Perfect	V-ing perfect
oughtn't I to have skulked? oughtn't you to have skulked? oughtn't he to have skulked? oughtn't we to have skulked? oughtn't you to have skulked? oughtn't they to have skulked?	oughtn't I to have been skulking? oughtn't you to have been skulking? oughtn't he to have been skulking? oughtn't we to have been skulking? oughtn't you to have been skulking? oughtn't they to have been skulking?