Conjugación del verbo inglés
MUST BEGIN

Verbo irregular: begin - began - begun

Afirmación

Forma simple	Forma con V-ing
I must begin you must begin she must begin we must begin you must begin they must begin	I must be beginning you must be beginning she must be beginning we must be beginning you must be beginning they must be beginning
Perfecto	Perfecto con V-ing
I must have begun you must have begun she must have begun we must have begun you must have begun they must have begun	I must have been beginning you must have been beginning she must have been beginning we must have been beginning you must have been beginning they must have been beginning

Negación

Forma simple	Forma con V-ing
I mustn't begin you mustn't begin she mustn't begin we mustn't begin you mustn't begin they mustn't begin	I mustn't be beginning you mustn't be beginning she mustn't be beginning we mustn't be beginning you mustn't be beginning they mustn't be beginning
Perfecto	Perfecto con V-ing
I mustn't have begun you mustn't have begun she mustn't have begun we mustn't have begun you mustn't have begun they mustn't have begun	I mustn't have been beginning you mustn't have been beginning she mustn't have been beginning we mustn't have been beginning you mustn't have been beginning they mustn't have been beginning

Forma interrogativa

Forma simple	Forma con V-ing
must I begin? must you begin? must she begin? must we begin? must you begin? must they begin?	must I be beginning? must you be beginning? must she be beginning? must we be beginning? must you be beginning? must they be beginning?
Perfecto	Perfecto con V-ing
must I have begun? must you have begun? must she have begun? must we have begun? must you have begun? must they have begun?	must I have been beginning? must you have been beginning? must she have been beginning? must we have been beginning? must you have been beginning? must they have been beginning?

Forma interro-negativa

Forma simple	Forma con V-ing
mustn't I begin? mustn't you begin? mustn't she begin? mustn't we begin? mustn't you begin? mustn't they begin?	mustn't I be beginning? mustn't you be beginning? mustn't she be beginning? mustn't we be beginning? mustn't you be beginning? mustn't they be beginning?
Perfecto	Perfecto con V-ing
mustn't I have begun? mustn't you have begun? mustn't she have begun? mustn't we have begun? mustn't you have begun? mustn't they have begun?	mustn't I have been beginning? mustn't you have been beginning? mustn't she have been beginning? mustn't we have been beginning? mustn't you have been beginning? mustn't they have been beginning?