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 oughtn't to ski you oughtn't to ski he oughtn't to ski we oughtn't to ski you oughtn't to ski they oughtn't to ski	I oughtn't to be skiing you oughtn't to be skiing he oughtn't to be skiing we oughtn't to be skiing you oughtn't to be skiing they oughtn't to be skiing
Perfect	V-ing perfect
I oughtn't to have skied you oughtn't to have skied he oughtn't to have skied we oughtn't to have skied you oughtn't to have skied they oughtn't to have skied	I oughtn't to have been skiing you oughtn't to have been skiing he oughtn't to have been skiing we oughtn't to have been skiing you oughtn't to have been skiing they oughtn't 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
oughtn't I to ski? oughtn't you to ski? oughtn't he to ski? oughtn't we to ski? oughtn't you to ski? oughtn't they to ski?	oughtn't I to be skiing? oughtn't you to be skiing? oughtn't he to be skiing? oughtn't we to be skiing? oughtn't you to be skiing? oughtn't they to be skiing?
Perfect	V-ing perfect
oughtn't I to have skied? oughtn't you to have skied? oughtn't he to have skied? oughtn't we to have skied? oughtn't you to have skied? oughtn't they to have skied?	oughtn't I to have been skiing? oughtn't you to have been skiing? oughtn't he to have been skiing? oughtn't we to have been skiing? oughtn't you to have been skiing? oughtn't they to have been skiing?