English verb conjugation
SHOULD RETRIEVE

Regular verb: retrieve - retrieved - retrieved

Affirmation

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

Negation

Simple form	V-ing form
I should not retrieve you should not retrieve she should not retrieve we should not retrieve you should not retrieve they should not retrieve	I should not be retrieving you should not be retrieving she should not be retrieving we should not be retrieving you should not be retrieving they should not be retrieving
Perfect	V-ing perfect
I should not have retrieved you should not have retrieved she should not have retrieved we should not have retrieved you should not have retrieved they should not have retrieved	I should not have been retrieving you should not have been retrieving she should not have been retrieving we should not have been retrieving you should not have been retrieving they should not have been retrieving

Interrogative form

Simple form	V-ing form
should I retrieve? should you retrieve? should she retrieve? should we retrieve? should you retrieve? should they retrieve?	should I be retrieving? should you be retrieving? should she 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 she 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 she 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
should I not retrieve? should you not retrieve? should she not retrieve? should we not retrieve? should you not retrieve? should they not retrieve?	should I not be retrieving? should you not be retrieving? should she not be retrieving? should we not be retrieving? should you not be retrieving? should they not be retrieving?
Perfect	V-ing perfect
should I not have retrieved? should you not have retrieved? should she not have retrieved? should we not have retrieved? should you not have retrieved? should they not have retrieved?	should I not have been retrieving? should you not have been retrieving? should she not have been retrieving? should we not have been retrieving? should you not have been retrieving? should they not have been retrieving?