I ought to subtract you ought to subtract she ought to subtract we ought to subtract you ought to subtract they ought to subtract
V-ing form
I ought to be subtracting you ought to be subtracting she ought to be subtracting we ought to be subtracting you ought to be subtracting they ought to be subtracting
Perfect
I ought to have subtracted you ought to have subtracted she ought to have subtracted we ought to have subtracted you ought to have subtracted they ought to have subtracted
V-ing perfect
I ought to have been subtracting you ought to have been subtracting she ought to have been subtracting we ought to have been subtracting you ought to have been subtracting they ought to have been subtracting
Negation
Simple form
I oughtn't to subtract you oughtn't to subtract she oughtn't to subtract we oughtn't to subtract you oughtn't to subtract they oughtn't to subtract
V-ing form
I oughtn't to be subtracting you oughtn't to be subtracting she oughtn't to be subtracting we oughtn't to be subtracting you oughtn't to be subtracting they oughtn't to be subtracting
Perfect
I oughtn't to have subtracted you oughtn't to have subtracted she oughtn't to have subtracted we oughtn't to have subtracted you oughtn't to have subtracted they oughtn't to have subtracted
V-ing perfect
I oughtn't to have been subtracting you oughtn't to have been subtracting she oughtn't to have been subtracting we oughtn't to have been subtracting you oughtn't to have been subtracting they oughtn't to have been subtracting
Interrogative form
Simple form
ought to I subtract? ought to you subtract? ought to she subtract? ought to we subtract? ought to you subtract? ought to they subtract?
V-ing form
ought to I be subtracting? ought to you be subtracting? ought to she be subtracting? ought to we be subtracting? ought to you be subtracting? ought to they be subtracting?
Perfect
ought to I have subtracted? ought to you have subtracted? ought to she have subtracted? ought to we have subtracted? ought to you have subtracted? ought to they have subtracted?
V-ing perfect
ought to I have been subtracting? ought to you have been subtracting? ought to she have been subtracting? ought to we have been subtracting? ought to you have been subtracting? ought to they have been subtracting?
Interro-negative form
Simple form
oughtn't I to subtract? oughtn't you to subtract? oughtn't she to subtract? oughtn't we to subtract? oughtn't you to subtract? oughtn't they to subtract?
V-ing form
oughtn't I to be subtracting? oughtn't you to be subtracting? oughtn't she to be subtracting? oughtn't we to be subtracting? oughtn't you to be subtracting? oughtn't they to be subtracting?
Perfect
oughtn't I to have subtracted? oughtn't you to have subtracted? oughtn't she to have subtracted? oughtn't we to have subtracted? oughtn't you to have subtracted? oughtn't they to have subtracted?
V-ing perfect
oughtn't I to have been subtracting? oughtn't you to have been subtracting? oughtn't she to have been subtracting? oughtn't we to have been subtracting? oughtn't you to have been subtracting? oughtn't they to have been subtracting?