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