English verb conjugation
OUGHT TO TWIN

Regular verb: twin - twinned - twinned

Affirmation

Simple form	V-ing form
I ought to twin you ought to twin she ought to twin we ought to twin you ought to twin they ought to twin	I ought to be twinning you ought to be twinning she ought to be twinning we ought to be twinning you ought to be twinning they ought to be twinning
Perfect	V-ing perfect
I ought to have twinned you ought to have twinned she ought to have twinned we ought to have twinned you ought to have twinned they ought to have twinned	I ought to have been twinning you ought to have been twinning she ought to have been twinning we ought to have been twinning you ought to have been twinning they ought to have been twinning

Negation

Simple form	V-ing form
I oughtn't to twin you oughtn't to twin she oughtn't to twin we oughtn't to twin you oughtn't to twin they oughtn't to twin	I oughtn't to be twinning you oughtn't to be twinning she oughtn't to be twinning we oughtn't to be twinning you oughtn't to be twinning they oughtn't to be twinning
Perfect	V-ing perfect
I oughtn't to have twinned you oughtn't to have twinned she oughtn't to have twinned we oughtn't to have twinned you oughtn't to have twinned they oughtn't to have twinned	I oughtn't to have been twinning you oughtn't to have been twinning she oughtn't to have been twinning we oughtn't to have been twinning you oughtn't to have been twinning they oughtn't to have been twinning

Interrogative form

Simple form	V-ing form
ought to I twin? ought to you twin? ought to she twin? ought to we twin? ought to you twin? ought to they twin?	ought to I be twinning? ought to you be twinning? ought to she be twinning? ought to we be twinning? ought to you be twinning? ought to they be twinning?
Perfect	V-ing perfect
ought to I have twinned? ought to you have twinned? ought to she have twinned? ought to we have twinned? ought to you have twinned? ought to they have twinned?	ought to I have been twinning? ought to you have been twinning? ought to she have been twinning? ought to we have been twinning? ought to you have been twinning? ought to they have been twinning?

Interro-negative form

Simple form	V-ing form
oughtn't I to twin? oughtn't you to twin? oughtn't she to twin? oughtn't we to twin? oughtn't you to twin? oughtn't they to twin?	oughtn't I to be twinning? oughtn't you to be twinning? oughtn't she to be twinning? oughtn't we to be twinning? oughtn't you to be twinning? oughtn't they to be twinning?
Perfect	V-ing perfect
oughtn't I to have twinned? oughtn't you to have twinned? oughtn't she to have twinned? oughtn't we to have twinned? oughtn't you to have twinned? oughtn't they to have twinned?	oughtn't I to have been twinning? oughtn't you to have been twinning? oughtn't she to have been twinning? oughtn't we to have been twinning? oughtn't you to have been twinning? oughtn't they to have been twinning?