English verb conjugation
SHOULD FOREWARN

Regular verb: forewarn - forewarned - forewarned

Affirmation

Simple form	V-ing form
I should forewarn you should forewarn he should forewarn we should forewarn you should forewarn they should forewarn	I should be forewarning you should be forewarning he should be forewarning we should be forewarning you should be forewarning they should be forewarning
Perfect	V-ing perfect
I should have forewarned you should have forewarned he should have forewarned we should have forewarned you should have forewarned they should have forewarned	I should have been forewarning you should have been forewarning he should have been forewarning we should have been forewarning you should have been forewarning they should have been forewarning

Negation

Simple form	V-ing form
I should not forewarn you should not forewarn he should not forewarn we should not forewarn you should not forewarn they should not forewarn	I should not be forewarning you should not be forewarning he should not be forewarning we should not be forewarning you should not be forewarning they should not be forewarning
Perfect	V-ing perfect
I should not have forewarned you should not have forewarned he should not have forewarned we should not have forewarned you should not have forewarned they should not have forewarned	I should not have been forewarning you should not have been forewarning he should not have been forewarning we should not have been forewarning you should not have been forewarning they should not have been forewarning

Interrogative form

Simple form	V-ing form
should I forewarn? should you forewarn? should he forewarn? should we forewarn? should you forewarn? should they forewarn?	should I be forewarning? should you be forewarning? should he be forewarning? should we be forewarning? should you be forewarning? should they be forewarning?
Perfect	V-ing perfect
should I have forewarned? should you have forewarned? should he have forewarned? should we have forewarned? should you have forewarned? should they have forewarned?	should I have been forewarning? should you have been forewarning? should he have been forewarning? should we have been forewarning? should you have been forewarning? should they have been forewarning?

Interro-negative form

Simple form	V-ing form
should I not forewarn? should you not forewarn? should he not forewarn? should we not forewarn? should you not forewarn? should they not forewarn?	should I not be forewarning? should you not be forewarning? should he not be forewarning? should we not be forewarning? should you not be forewarning? should they not be forewarning?
Perfect	V-ing perfect
should I not have forewarned? should you not have forewarned? should he not have forewarned? should we not have forewarned? should you not have forewarned? should they not have forewarned?	should I not have been forewarning? should you not have been forewarning? should he not have been forewarning? should we not have been forewarning? should you not have been forewarning? should they not have been forewarning?