English verb conjugation
SHOULD DOUBT

Regular verb: doubt - doubted - doubted

Affirmation

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

Negation

Simple form	V-ing form
I should not doubt you should not doubt he should not doubt we should not doubt you should not doubt they should not doubt	I should not be doubting you should not be doubting he should not be doubting we should not be doubting you should not be doubting they should not be doubting
Perfect	V-ing perfect
I should not have doubted you should not have doubted he should not have doubted we should not have doubted you should not have doubted they should not have doubted	I should not have been doubting you should not have been doubting he should not have been doubting we should not have been doubting you should not have been doubting they should not have been doubting

Interrogative form

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

Interro-negative form

Simple form	V-ing form
should I not doubt? should you not doubt? should he not doubt? should we not doubt? should you not doubt? should they not doubt?	should I not be doubting? should you not be doubting? should he not be doubting? should we not be doubting? should you not be doubting? should they not be doubting?
Perfect	V-ing perfect
should I not have doubted? should you not have doubted? should he not have doubted? should we not have doubted? should you not have doubted? should they not have doubted?	should I not have been doubting? should you not have been doubting? should he not have been doubting? should we not have been doubting? should you not have been doubting? should they not have been doubting?