English verb conjugation
WOULD DOUBT

Regular verb: doubt - doubted - doubted

Affirmation

Simple form	V-ing form
I'd doubt you'd doubt he'd doubt we'd doubt you'd doubt they'd doubt	I'd be doubting you'd be doubting he'd be doubting we'd be doubting you'd be doubting they'd be doubting
Perfect	V-ing perfect
I would've doubted you would've doubted he would've doubted we would've doubted you would've doubted they would've doubted	I would've been doubting you would've been doubting he would've been doubting we would've been doubting you would've been doubting they would've been doubting

Negation

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

Interrogative form

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

Interro-negative form

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