English verb conjugation
SHOULD HEADBUTT

Regular verb: headbutt - headbutted - headbutted

Affirmation

Simple form	V-ing form
I should headbutt you should headbutt he should headbutt we should headbutt you should headbutt they should headbutt	I should be headbutting you should be headbutting he should be headbutting we should be headbutting you should be headbutting they should be headbutting
Perfect	V-ing perfect
I should have headbutted you should have headbutted he should have headbutted we should have headbutted you should have headbutted they should have headbutted	I should have been headbutting you should have been headbutting he should have been headbutting we should have been headbutting you should have been headbutting they should have been headbutting

Negation

Simple form	V-ing form
I should not headbutt you should not headbutt he should not headbutt we should not headbutt you should not headbutt they should not headbutt	I should not be headbutting you should not be headbutting he should not be headbutting we should not be headbutting you should not be headbutting they should not be headbutting
Perfect	V-ing perfect
I should not have headbutted you should not have headbutted he should not have headbutted we should not have headbutted you should not have headbutted they should not have headbutted	I should not have been headbutting you should not have been headbutting he should not have been headbutting we should not have been headbutting you should not have been headbutting they should not have been headbutting

Interrogative form

Simple form	V-ing form
should I headbutt? should you headbutt? should he headbutt? should we headbutt? should you headbutt? should they headbutt?	should I be headbutting? should you be headbutting? should he be headbutting? should we be headbutting? should you be headbutting? should they be headbutting?
Perfect	V-ing perfect
should I have headbutted? should you have headbutted? should he have headbutted? should we have headbutted? should you have headbutted? should they have headbutted?	should I have been headbutting? should you have been headbutting? should he have been headbutting? should we have been headbutting? should you have been headbutting? should they have been headbutting?

Interro-negative form

Simple form	V-ing form
should I not headbutt? should you not headbutt? should he not headbutt? should we not headbutt? should you not headbutt? should they not headbutt?	should I not be headbutting? should you not be headbutting? should he not be headbutting? should we not be headbutting? should you not be headbutting? should they not be headbutting?
Perfect	V-ing perfect
should I not have headbutted? should you not have headbutted? should he not have headbutted? should we not have headbutted? should you not have headbutted? should they not have headbutted?	should I not have been headbutting? should you not have been headbutting? should he not have been headbutting? should we not have been headbutting? should you not have been headbutting? should they not have been headbutting?