English verb conjugation
SHOULD RETURN

Regular verb: return - returned - returned

Affirmation

Simple form	V-ing form
I should return you should return he should return we should return you should return they should return	I should be returning you should be returning he should be returning we should be returning you should be returning they should be returning
Perfect	V-ing perfect
I should have returned you should have returned he should have returned we should have returned you should have returned they should have returned	I should have been returning you should have been returning he should have been returning we should have been returning you should have been returning they should have been returning

Negation

Simple form	V-ing form
I should not return you should not return he should not return we should not return you should not return they should not return	I should not be returning you should not be returning he should not be returning we should not be returning you should not be returning they should not be returning
Perfect	V-ing perfect
I should not have returned you should not have returned he should not have returned we should not have returned you should not have returned they should not have returned	I should not have been returning you should not have been returning he should not have been returning we should not have been returning you should not have been returning they should not have been returning

Interrogative form

Simple form	V-ing form
should I return? should you return? should he return? should we return? should you return? should they return?	should I be returning? should you be returning? should he be returning? should we be returning? should you be returning? should they be returning?
Perfect	V-ing perfect
should I have returned? should you have returned? should he have returned? should we have returned? should you have returned? should they have returned?	should I have been returning? should you have been returning? should he have been returning? should we have been returning? should you have been returning? should they have been returning?

Interro-negative form

Simple form	V-ing form
should I not return? should you not return? should he not return? should we not return? should you not return? should they not return?	should I not be returning? should you not be returning? should he not be returning? should we not be returning? should you not be returning? should they not be returning?
Perfect	V-ing perfect
should I not have returned? should you not have returned? should he not have returned? should we not have returned? should you not have returned? should they not have returned?	should I not have been returning? should you not have been returning? should he not have been returning? should we not have been returning? should you not have been returning? should they not have been returning?