English verb conjugation
OUGHT TO UNDERTAIN

Regular verb: undertain - undertained - undertained

Affirmation

Simple form	V-ing form
I ought to undertain you ought to undertain he ought to undertain we ought to undertain you ought to undertain they ought to undertain	I ought to be undertaining you ought to be undertaining he ought to be undertaining we ought to be undertaining you ought to be undertaining they ought to be undertaining
Perfect	V-ing perfect
I ought to have undertained you ought to have undertained he ought to have undertained we ought to have undertained you ought to have undertained they ought to have undertained	I ought to have been undertaining you ought to have been undertaining he ought to have been undertaining we ought to have been undertaining you ought to have been undertaining they ought to have been undertaining

Negation

Simple form	V-ing form
I oughtn't to undertain you oughtn't to undertain he oughtn't to undertain we oughtn't to undertain you oughtn't to undertain they oughtn't to undertain	I oughtn't to be undertaining you oughtn't to be undertaining he oughtn't to be undertaining we oughtn't to be undertaining you oughtn't to be undertaining they oughtn't to be undertaining
Perfect	V-ing perfect
I oughtn't to have undertained you oughtn't to have undertained he oughtn't to have undertained we oughtn't to have undertained you oughtn't to have undertained they oughtn't to have undertained	I oughtn't to have been undertaining you oughtn't to have been undertaining he oughtn't to have been undertaining we oughtn't to have been undertaining you oughtn't to have been undertaining they oughtn't to have been undertaining

Interrogative form

Simple form	V-ing form
ought to I undertain? ought to you undertain? ought to he undertain? ought to we undertain? ought to you undertain? ought to they undertain?	ought to I be undertaining? ought to you be undertaining? ought to he be undertaining? ought to we be undertaining? ought to you be undertaining? ought to they be undertaining?
Perfect	V-ing perfect
ought to I have undertained? ought to you have undertained? ought to he have undertained? ought to we have undertained? ought to you have undertained? ought to they have undertained?	ought to I have been undertaining? ought to you have been undertaining? ought to he have been undertaining? ought to we have been undertaining? ought to you have been undertaining? ought to they have been undertaining?

Interro-negative form

Simple form	V-ing form
oughtn't I to undertain? oughtn't you to undertain? oughtn't he to undertain? oughtn't we to undertain? oughtn't you to undertain? oughtn't they to undertain?	oughtn't I to be undertaining? oughtn't you to be undertaining? oughtn't he to be undertaining? oughtn't we to be undertaining? oughtn't you to be undertaining? oughtn't they to be undertaining?
Perfect	V-ing perfect
oughtn't I to have undertained? oughtn't you to have undertained? oughtn't he to have undertained? oughtn't we to have undertained? oughtn't you to have undertained? oughtn't they to have undertained?	oughtn't I to have been undertaining? oughtn't you to have been undertaining? oughtn't he to have been undertaining? oughtn't we to have been undertaining? oughtn't you to have been undertaining? oughtn't they to have been undertaining?