English verb conjugation
SHOULD DERIVE

Regular verb: derive - derived - derived

Affirmation

Simple form	V-ing form
I'd derive you'd derive he'd derive we'd derive you'd derive they'd derive	I'd be deriving you'd be deriving he'd be deriving we'd be deriving you'd be deriving they'd be deriving
Perfect	V-ing perfect
I should've derived you should've derived he should've derived we should've derived you should've derived they should've derived	I should've been deriving you should've been deriving he should've been deriving we should've been deriving you should've been deriving they should've been deriving

Negation

Simple form	V-ing form
I shouldn't derive you shouldn't derive he shouldn't derive we shouldn't derive you shouldn't derive they shouldn't derive	I shouldn't be deriving you shouldn't be deriving he shouldn't be deriving we shouldn't be deriving you shouldn't be deriving they shouldn't be deriving
Perfect	V-ing perfect
I shouldn't have derived you shouldn't have derived he shouldn't have derived we shouldn't have derived you shouldn't have derived they shouldn't have derived	I shouldn't have been deriving you shouldn't have been deriving he shouldn't have been deriving we shouldn't have been deriving you shouldn't have been deriving they shouldn't have been deriving

Interrogative form

Simple form	V-ing form
should I derive? should you derive? should he derive? should we derive? should you derive? should they derive?	should I be deriving? should you be deriving? should he be deriving? should we be deriving? should you be deriving? should they be deriving?
Perfect	V-ing perfect
should I have derived? should you have derived? should he have derived? should we have derived? should you have derived? should they have derived?	should I have been deriving? should you have been deriving? should he have been deriving? should we have been deriving? should you have been deriving? should they have been deriving?

Interro-negative form

Simple form	V-ing form
shouldn't I derive? shouldn't you derive? shouldn't he derive? shouldn't we derive? shouldn't you derive? shouldn't they derive?	shouldn't I be deriving? shouldn't you be deriving? shouldn't he be deriving? shouldn't we be deriving? shouldn't you be deriving? shouldn't they be deriving?
Perfect	V-ing perfect
shouldn't I have derived? shouldn't you have derived? shouldn't he have derived? shouldn't we have derived? shouldn't you have derived? shouldn't they have derived?	shouldn't I have been deriving? shouldn't you have been deriving? shouldn't he have been deriving? shouldn't we have been deriving? shouldn't you have been deriving? shouldn't they have been deriving?