I ought to ski you ought to ski she ought to ski we ought to ski you ought to ski they ought to ski
V-ing form
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
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
V-ing perfect
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
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
V-ing form
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
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
V-ing perfect
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
ought to I ski? ought to you ski? ought to she ski? ought to we ski? ought to you ski? ought to they ski?
V-ing form
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
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?
V-ing perfect
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
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?
V-ing form
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
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?
V-ing perfect
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?