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