English verb conjugation
OUGHT TO SKI

Regular verb: ski - skied - skied

Affirmation

Simple form	V-ing form
I ought to ski you ought to ski he ought to ski we ought to ski you ought to ski they ought to ski	I ought to be skiing you ought to be skiing he ought to be skiing we ought to be skiing you ought to be skiing they ought to be skiing
Perfect	V-ing perfect
I ought to have skied you ought to have skied he ought to have skied we ought to have skied you ought to have skied they ought to have skied	I ought to have been skiing you ought to have been skiing he ought to have been skiing we ought to have been skiing you ought to have been skiing they ought to have been skiing

Negation

Simple form	V-ing form
I ought not to ski you ought not to ski he ought not to ski we ought not to ski you ought not to ski they ought not to ski	I ought not to skiing you ought not to skiing he ought not to skiing we ought not to skiing you ought not to skiing they ought not to skiing
Perfect	V-ing perfect
I ought not to have skied you ought not to have skied he ought not to have skied we ought not to have skied you ought not to have skied they ought not to have skied	I ought not to have been skiing you ought not to have been skiing he ought not to have been skiing we ought not to have been skiing you ought not to have been skiing they ought not to have been skiing

Interrogative form

Simple form	V-ing form
ought to I ski? ought to you ski? ought to he ski? ought to we ski? ought to you ski? ought to they ski?	ought to I be skiing? ought to you be skiing? ought to he be skiing? ought to we be skiing? ought to you be skiing? ought to they be skiing?
Perfect	V-ing perfect
ought to I have skied? ought to you have skied? ought to he have skied? ought to we have skied? ought to you have skied? ought to they have skied?	ought to I have been skiing? ought to you have been skiing? ought to he have been skiing? ought to we have been skiing? ought to you have been skiing? ought to they have been skiing?

Interro-negative form

Simple form	V-ing form
ought I not to ski? ought you not to ski? ought he not to ski? ought we not to ski? ought you not to ski? ought they not to ski?	ought I not to be skiing? ought you not to be skiing? ought he not to be skiing? ought we not to be skiing? ought you not to be skiing? ought they not to be skiing?
Perfect	V-ing perfect
ought I not to have skied? ought you not to have skied? ought he not to have skied? ought we not to have skied? ought you not to have skied? ought they not to have skied?	ought I not to have been skiing? ought you not to have been skiing? ought he not to have been skiing? ought we not to have been skiing? ought you not to have been skiing? ought they not to have been skiing?