English verb conjugation
SHOULD RETRIEVE

Regular verb: retrieve - retrieved - retrieved

Affirmation

Simple form	V-ing form
I'd retrieve you'd retrieve he'd retrieve we'd retrieve you'd retrieve they'd retrieve	I'd be retrieving you'd be retrieving he'd be retrieving we'd be retrieving you'd be retrieving they'd be retrieving
Perfect	V-ing perfect
I should've retrieved you should've retrieved he should've retrieved we should've retrieved you should've retrieved they should've retrieved	I should've been retrieving you should've been retrieving he should've been retrieving we should've been retrieving you should've been retrieving they should've been retrieving

Negation

Simple form	V-ing form
I shouldn't retrieve you shouldn't retrieve he shouldn't retrieve we shouldn't retrieve you shouldn't retrieve they shouldn't retrieve	I shouldn't be retrieving you shouldn't be retrieving he shouldn't be retrieving we shouldn't be retrieving you shouldn't be retrieving they shouldn't be retrieving
Perfect	V-ing perfect
I shouldn't have retrieved you shouldn't have retrieved he shouldn't have retrieved we shouldn't have retrieved you shouldn't have retrieved they shouldn't have retrieved	I shouldn't have been retrieving you shouldn't have been retrieving he shouldn't have been retrieving we shouldn't have been retrieving you shouldn't have been retrieving they shouldn't have been retrieving

Interrogative form

Simple form	V-ing form
should I retrieve? should you retrieve? should he retrieve? should we retrieve? should you retrieve? should they retrieve?	should I be retrieving? should you be retrieving? should he be retrieving? should we be retrieving? should you be retrieving? should they be retrieving?
Perfect	V-ing perfect
should I have retrieved? should you have retrieved? should he have retrieved? should we have retrieved? should you have retrieved? should they have retrieved?	should I have been retrieving? should you have been retrieving? should he have been retrieving? should we have been retrieving? should you have been retrieving? should they have been retrieving?

Interro-negative form

Simple form	V-ing form
shouldn't I retrieve? shouldn't you retrieve? shouldn't he retrieve? shouldn't we retrieve? shouldn't you retrieve? shouldn't they retrieve?	shouldn't I be retrieving? shouldn't you be retrieving? shouldn't he be retrieving? shouldn't we be retrieving? shouldn't you be retrieving? shouldn't they be retrieving?
Perfect	V-ing perfect
shouldn't I have retrieved? shouldn't you have retrieved? shouldn't he have retrieved? shouldn't we have retrieved? shouldn't you have retrieved? shouldn't they have retrieved?	shouldn't I have been retrieving? shouldn't you have been retrieving? shouldn't he have been retrieving? shouldn't we have been retrieving? shouldn't you have been retrieving? shouldn't they have been retrieving?