English verb conjugation
SHOULD FRET

Regular verb: fret - fretted - fretted

Affirmation

Simple form	V-ing form
I should fret you should fret he should fret we should fret you should fret they should fret	I should be fretting you should be fretting he should be fretting we should be fretting you should be fretting they should be fretting
Perfect	V-ing perfect
I should have fretted you should have fretted he should have fretted we should have fretted you should have fretted they should have fretted	I should have been fretting you should have been fretting he should have been fretting we should have been fretting you should have been fretting they should have been fretting

Negation

Simple form	V-ing form
I should not fret you should not fret he should not fret we should not fret you should not fret they should not fret	I should not be fretting you should not be fretting he should not be fretting we should not be fretting you should not be fretting they should not be fretting
Perfect	V-ing perfect
I should not have fretted you should not have fretted he should not have fretted we should not have fretted you should not have fretted they should not have fretted	I should not have been fretting you should not have been fretting he should not have been fretting we should not have been fretting you should not have been fretting they should not have been fretting

Interrogative form

Simple form	V-ing form
should I fret? should you fret? should he fret? should we fret? should you fret? should they fret?	should I be fretting? should you be fretting? should he be fretting? should we be fretting? should you be fretting? should they be fretting?
Perfect	V-ing perfect
should I have fretted? should you have fretted? should he have fretted? should we have fretted? should you have fretted? should they have fretted?	should I have been fretting? should you have been fretting? should he have been fretting? should we have been fretting? should you have been fretting? should they have been fretting?

Interro-negative form

Simple form	V-ing form
should I not fret? should you not fret? should he not fret? should we not fret? should you not fret? should they not fret?	should I not be fretting? should you not be fretting? should he not be fretting? should we not be fretting? should you not be fretting? should they not be fretting?
Perfect	V-ing perfect
should I not have fretted? should you not have fretted? should he not have fretted? should we not have fretted? should you not have fretted? should they not have fretted?	should I not have been fretting? should you not have been fretting? should he not have been fretting? should we not have been fretting? should you not have been fretting? should they not have been fretting?