Conjugación del verbo inglés
MUST HEADBUTT

Verbo regular: headbutt - headbutted - headbutted

Afirmación

Forma simple	Forma con V-ing
I must headbutt you must headbutt he must headbutt we must headbutt you must headbutt they must headbutt	I must be headbutting you must be headbutting he must be headbutting we must be headbutting you must be headbutting they must be headbutting
Perfecto	Perfecto con V-ing
I must have headbutted you must have headbutted he must have headbutted we must have headbutted you must have headbutted they must have headbutted	I must have been headbutting you must have been headbutting he must have been headbutting we must have been headbutting you must have been headbutting they must have been headbutting

Negación

Forma simple	Forma con V-ing
I must not headbutt you must not headbutt he must not headbutt we must not headbutt you must not headbutt they must not headbutt	I must not be headbutting you must not be headbutting he must not be headbutting we must not be headbutting you must not be headbutting they must not be headbutting
Perfecto	Perfecto con V-ing
I must not have headbutted you must not have headbutted he must not have headbutted we must not have headbutted you must not have headbutted they must not have headbutted	I must not have been headbutting you must not have been headbutting he must not have been headbutting we must not have been headbutting you must not have been headbutting they must not have been headbutting

Forma interrogativa

Forma simple	Forma con V-ing
must I headbutt? must you headbutt? must he headbutt? must we headbutt? must you headbutt? must they headbutt?	must I be headbutting? must you be headbutting? must he be headbutting? must we be headbutting? must you be headbutting? must they be headbutting?
Perfecto	Perfecto con V-ing
must I have headbutted? must you have headbutted? must he have headbutted? must we have headbutted? must you have headbutted? must they have headbutted?	must I have been headbutting? must you have been headbutting? must he have been headbutting? must we have been headbutting? must you have been headbutting? must they have been headbutting?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not headbutt? must you not headbutt? must he not headbutt? must we not headbutt? must you not headbutt? must they not headbutt?	must I not be headbutting? must you not be headbutting? must he not be headbutting? must we not be headbutting? must you not be headbutting? must they not be headbutting?
Perfecto	Perfecto con V-ing
must I not have headbutted? must you not have headbutted? must he not have headbutted? must we not have headbutted? must you not have headbutted? must they not have headbutted?	must I not have been headbutting? must you not have been headbutting? must he not have been headbutting? must we not have been headbutting? must you not have been headbutting? must they not have been headbutting?