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