I must owe you must owe she must owe we must owe you must owe they must owe
Forma con V-ing
I must be owing you must be owing she must be owing we must be owing you must be owing they must be owing
Perfecto
I must have owed you must have owed she must have owed we must have owed you must have owed they must have owed
Perfecto con V-ing
I must have been owing you must have been owing she must have been owing we must have been owing you must have been owing they must have been owing
Negación
Forma simple
I must not owe you must not owe she must not owe we must not owe you must not owe they must not owe
Forma con V-ing
I must not be owing you must not be owing she must not be owing we must not be owing you must not be owing they must not be owing
Perfecto
I must not have owed you must not have owed she must not have owed we must not have owed you must not have owed they must not have owed
Perfecto con V-ing
I must not have been owing you must not have been owing she must not have been owing we must not have been owing you must not have been owing they must not have been owing
Forma interrogativa
Forma simple
must I owe? must you owe? must she owe? must we owe? must you owe? must they owe?
Forma con V-ing
must I be owing? must you be owing? must she be owing? must we be owing? must you be owing? must they be owing?
Perfecto
must I have owed? must you have owed? must she have owed? must we have owed? must you have owed? must they have owed?
Perfecto con V-ing
must I have been owing? must you have been owing? must she have been owing? must we have been owing? must you have been owing? must they have been owing?
Forma interro-negativa
Forma simple
must I not owe? must you not owe? must she not owe? must we not owe? must you not owe? must they not owe?
Forma con V-ing
must I not be owing? must you not be owing? must she not be owing? must we not be owing? must you not be owing? must they not be owing?
Perfecto
must I not have owed? must you not have owed? must she not have owed? must we not have owed? must you not have owed? must they not have owed?
Perfecto con V-ing
must I not have been owing? must you not have been owing? must she not have been owing? must we not have been owing? must you not have been owing? must they not have been owing?