English verb conjugation
SHOULD REF

Regular verb: ref - refed - refed

Affirmation

Simple form	V-ing form
I should ref you should ref he should ref we should ref you should ref they should ref	I should be refing you should be refing he should be refing we should be refing you should be refing they should be refing
Perfect	V-ing perfect
I should have refed you should have refed he should have refed we should have refed you should have refed they should have refed	I should have been refing you should have been refing he should have been refing we should have been refing you should have been refing they should have been refing

Negation

Simple form	V-ing form
I should not ref you should not ref he should not ref we should not ref you should not ref they should not ref	I should not be refing you should not be refing he should not be refing we should not be refing you should not be refing they should not be refing
Perfect	V-ing perfect
I should not have refed you should not have refed he should not have refed we should not have refed you should not have refed they should not have refed	I should not have been refing you should not have been refing he should not have been refing we should not have been refing you should not have been refing they should not have been refing

Interrogative form

Simple form	V-ing form
should I ref? should you ref? should he ref? should we ref? should you ref? should they ref?	should I be refing? should you be refing? should he be refing? should we be refing? should you be refing? should they be refing?
Perfect	V-ing perfect
should I have refed? should you have refed? should he have refed? should we have refed? should you have refed? should they have refed?	should I have been refing? should you have been refing? should he have been refing? should we have been refing? should you have been refing? should they have been refing?

Interro-negative form

Simple form	V-ing form
should I not ref? should you not ref? should he not ref? should we not ref? should you not ref? should they not ref?	should I not be refing? should you not be refing? should he not be refing? should we not be refing? should you not be refing? should they not be refing?
Perfect	V-ing perfect
should I not have refed? should you not have refed? should he not have refed? should we not have refed? should you not have refed? should they not have refed?	should I not have been refing? should you not have been refing? should he not have been refing? should we not have been refing? should you not have been refing? should they not have been refing?