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 ought not to skulk you ought not to skulk he ought not to skulk we ought not to skulk you ought not to skulk they ought not to skulk	I ought not to skulking you ought not to skulking he ought not to skulking we ought not to skulking you ought not to skulking they ought not to skulking
Perfect	V-ing perfect
I ought not to have skulked you ought not to have skulked he ought not to have skulked we ought not to have skulked you ought not to have skulked they ought not to have skulked	I ought not to have been skulking you ought not to have been skulking he ought not to have been skulking we ought not to have been skulking you ought not to have been skulking they ought not 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
ought I not to skulk? ought you not to skulk? ought he not to skulk? ought we not to skulk? ought you not to skulk? ought they not to skulk?	ought I not to be skulking? ought you not to be skulking? ought he not to be skulking? ought we not to be skulking? ought you not to be skulking? ought they not to be skulking?
Perfect	V-ing perfect
ought I not to have skulked? ought you not to have skulked? ought he not to have skulked? ought we not to have skulked? ought you not to have skulked? ought they not to have skulked?	ought I not to have been skulking? ought you not to have been skulking? ought he not to have been skulking? ought we not to have been skulking? ought you not to have been skulking? ought they not to have been skulking?