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