I must shift you must shift she must shift we must shift you must shift they must shift
Forma con V-ing
I must be shifting you must be shifting she must be shifting we must be shifting you must be shifting they must be shifting
Perfecto
I must have shifted you must have shifted she must have shifted we must have shifted you must have shifted they must have shifted
Perfecto con V-ing
I must have been shifting you must have been shifting she must have been shifting we must have been shifting you must have been shifting they must have been shifting
Negación
Forma simple
I mustn't shift you mustn't shift she mustn't shift we mustn't shift you mustn't shift they mustn't shift
Forma con V-ing
I mustn't be shifting you mustn't be shifting she mustn't be shifting we mustn't be shifting you mustn't be shifting they mustn't be shifting
Perfecto
I mustn't have shifted you mustn't have shifted she mustn't have shifted we mustn't have shifted you mustn't have shifted they mustn't have shifted
Perfecto con V-ing
I mustn't have been shifting you mustn't have been shifting she mustn't have been shifting we mustn't have been shifting you mustn't have been shifting they mustn't have been shifting
Forma interrogativa
Forma simple
must I shift? must you shift? must she shift? must we shift? must you shift? must they shift?
Forma con V-ing
must I be shifting? must you be shifting? must she be shifting? must we be shifting? must you be shifting? must they be shifting?
Perfecto
must I have shifted? must you have shifted? must she have shifted? must we have shifted? must you have shifted? must they have shifted?
Perfecto con V-ing
must I have been shifting? must you have been shifting? must she have been shifting? must we have been shifting? must you have been shifting? must they have been shifting?
Forma interro-negativa
Forma simple
mustn't I shift? mustn't you shift? mustn't she shift? mustn't we shift? mustn't you shift? mustn't they shift?
Forma con V-ing
mustn't I be shifting? mustn't you be shifting? mustn't she be shifting? mustn't we be shifting? mustn't you be shifting? mustn't they be shifting?
Perfecto
mustn't I have shifted? mustn't you have shifted? mustn't she have shifted? mustn't we have shifted? mustn't you have shifted? mustn't they have shifted?
Perfecto con V-ing
mustn't I have been shifting? mustn't you have been shifting? mustn't she have been shifting? mustn't we have been shifting? mustn't you have been shifting? mustn't they have been shifting?