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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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 she 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?