English verb conjugation
OUGHT TO DOUBT

Regular verb: doubt - doubted - doubted

Affirmation

Simple form	V-ing form
I ought to doubt you ought to doubt he ought to doubt we ought to doubt you ought to doubt they ought to doubt	I ought to be doubting you ought to be doubting he ought to be doubting we ought to be doubting you ought to be doubting they ought to be doubting
Perfect	V-ing perfect
I ought to have doubted you ought to have doubted he ought to have doubted we ought to have doubted you ought to have doubted they ought to have doubted	I ought to have been doubting you ought to have been doubting he ought to have been doubting we ought to have been doubting you ought to have been doubting they ought to have been doubting

Negation

Simple form	V-ing form
I oughtn't to doubt you oughtn't to doubt he oughtn't to doubt we oughtn't to doubt you oughtn't to doubt they oughtn't to doubt	I oughtn't to be doubting you oughtn't to be doubting he oughtn't to be doubting we oughtn't to be doubting you oughtn't to be doubting they oughtn't to be doubting
Perfect	V-ing perfect
I oughtn't to have doubted you oughtn't to have doubted he oughtn't to have doubted we oughtn't to have doubted you oughtn't to have doubted they oughtn't to have doubted	I oughtn't to have been doubting you oughtn't to have been doubting he oughtn't to have been doubting we oughtn't to have been doubting you oughtn't to have been doubting they oughtn't to have been doubting

Interrogative form

Simple form	V-ing form
ought to I doubt? ought to you doubt? ought to he doubt? ought to we doubt? ought to you doubt? ought to they doubt?	ought to I be doubting? ought to you be doubting? ought to he be doubting? ought to we be doubting? ought to you be doubting? ought to they be doubting?
Perfect	V-ing perfect
ought to I have doubted? ought to you have doubted? ought to he have doubted? ought to we have doubted? ought to you have doubted? ought to they have doubted?	ought to I have been doubting? ought to you have been doubting? ought to he have been doubting? ought to we have been doubting? ought to you have been doubting? ought to they have been doubting?

Interro-negative form

Simple form	V-ing form
oughtn't I to doubt? oughtn't you to doubt? oughtn't he to doubt? oughtn't we to doubt? oughtn't you to doubt? oughtn't they to doubt?	oughtn't I to be doubting? oughtn't you to be doubting? oughtn't he to be doubting? oughtn't we to be doubting? oughtn't you to be doubting? oughtn't they to be doubting?
Perfect	V-ing perfect
oughtn't I to have doubted? oughtn't you to have doubted? oughtn't he to have doubted? oughtn't we to have doubted? oughtn't you to have doubted? oughtn't they to have doubted?	oughtn't I to have been doubting? oughtn't you to have been doubting? oughtn't he to have been doubting? oughtn't we to have been doubting? oughtn't you to have been doubting? oughtn't they to have been doubting?