English verb conjugation
OUGHT TO KNOCK

Regular verb: knock - knocked - knocked

Affirmation

Simple form	V-ing form
I ought to knock you ought to knock he ought to knock we ought to knock you ought to knock they ought to knock	I ought to be knocking you ought to be knocking he ought to be knocking we ought to be knocking you ought to be knocking they ought to be knocking
Perfect	V-ing perfect
I ought to have knocked you ought to have knocked he ought to have knocked we ought to have knocked you ought to have knocked they ought to have knocked	I ought to have been knocking you ought to have been knocking he ought to have been knocking we ought to have been knocking you ought to have been knocking they ought to have been knocking

Negation

Simple form	V-ing form
I oughtn't to knock you oughtn't to knock he oughtn't to knock we oughtn't to knock you oughtn't to knock they oughtn't to knock	I oughtn't to be knocking you oughtn't to be knocking he oughtn't to be knocking we oughtn't to be knocking you oughtn't to be knocking they oughtn't to be knocking
Perfect	V-ing perfect
I oughtn't to have knocked you oughtn't to have knocked he oughtn't to have knocked we oughtn't to have knocked you oughtn't to have knocked they oughtn't to have knocked	I oughtn't to have been knocking you oughtn't to have been knocking he oughtn't to have been knocking we oughtn't to have been knocking you oughtn't to have been knocking they oughtn't to have been knocking

Interrogative form

Simple form	V-ing form
ought to I knock? ought to you knock? ought to he knock? ought to we knock? ought to you knock? ought to they knock?	ought to I be knocking? ought to you be knocking? ought to he be knocking? ought to we be knocking? ought to you be knocking? ought to they be knocking?
Perfect	V-ing perfect
ought to I have knocked? ought to you have knocked? ought to he have knocked? ought to we have knocked? ought to you have knocked? ought to they have knocked?	ought to I have been knocking? ought to you have been knocking? ought to he have been knocking? ought to we have been knocking? ought to you have been knocking? ought to they have been knocking?

Interro-negative form

Simple form	V-ing form
oughtn't I to knock? oughtn't you to knock? oughtn't he to knock? oughtn't we to knock? oughtn't you to knock? oughtn't they to knock?	oughtn't I to be knocking? oughtn't you to be knocking? oughtn't he to be knocking? oughtn't we to be knocking? oughtn't you to be knocking? oughtn't they to be knocking?
Perfect	V-ing perfect
oughtn't I to have knocked? oughtn't you to have knocked? oughtn't he to have knocked? oughtn't we to have knocked? oughtn't you to have knocked? oughtn't they to have knocked?	oughtn't I to have been knocking? oughtn't you to have been knocking? oughtn't he to have been knocking? oughtn't we to have been knocking? oughtn't you to have been knocking? oughtn't they to have been knocking?