English verb conjugation
OUGHT TO CROAK

Regular verb: croak - croaked - croaked

Affirmation

Simple form	V-ing form
I ought to croak you ought to croak she ought to croak we ought to croak you ought to croak they ought to croak	I ought to be croaking you ought to be croaking she ought to be croaking we ought to be croaking you ought to be croaking they ought to be croaking
Perfect	V-ing perfect
I ought to have croaked you ought to have croaked she ought to have croaked we ought to have croaked you ought to have croaked they ought to have croaked	I ought to have been croaking you ought to have been croaking she ought to have been croaking we ought to have been croaking you ought to have been croaking they ought to have been croaking

Negation

Simple form	V-ing form
I oughtn't to croak you oughtn't to croak she oughtn't to croak we oughtn't to croak you oughtn't to croak they oughtn't to croak	I oughtn't to be croaking you oughtn't to be croaking she oughtn't to be croaking we oughtn't to be croaking you oughtn't to be croaking they oughtn't to be croaking
Perfect	V-ing perfect
I oughtn't to have croaked you oughtn't to have croaked she oughtn't to have croaked we oughtn't to have croaked you oughtn't to have croaked they oughtn't to have croaked	I oughtn't to have been croaking you oughtn't to have been croaking she oughtn't to have been croaking we oughtn't to have been croaking you oughtn't to have been croaking they oughtn't to have been croaking

Interrogative form

Simple form	V-ing form
ought to I croak? ought to you croak? ought to she croak? ought to we croak? ought to you croak? ought to they croak?	ought to I be croaking? ought to you be croaking? ought to she be croaking? ought to we be croaking? ought to you be croaking? ought to they be croaking?
Perfect	V-ing perfect
ought to I have croaked? ought to you have croaked? ought to she have croaked? ought to we have croaked? ought to you have croaked? ought to they have croaked?	ought to I have been croaking? ought to you have been croaking? ought to she have been croaking? ought to we have been croaking? ought to you have been croaking? ought to they have been croaking?

Interro-negative form

Simple form	V-ing form
oughtn't I to croak? oughtn't you to croak? oughtn't she to croak? oughtn't we to croak? oughtn't you to croak? oughtn't they to croak?	oughtn't I to be croaking? oughtn't you to be croaking? oughtn't she to be croaking? oughtn't we to be croaking? oughtn't you to be croaking? oughtn't they to be croaking?
Perfect	V-ing perfect
oughtn't I to have croaked? oughtn't you to have croaked? oughtn't she to have croaked? oughtn't we to have croaked? oughtn't you to have croaked? oughtn't they to have croaked?	oughtn't I to have been croaking? oughtn't you to have been croaking? oughtn't she to have been croaking? oughtn't we to have been croaking? oughtn't you to have been croaking? oughtn't they to have been croaking?