I must gnaw you must gnaw he must gnaw we must gnaw you must gnaw they must gnaw
Forma con V-ing
I must be gnawing you must be gnawing he must be gnawing we must be gnawing you must be gnawing they must be gnawing
Perfecto
I must have gnawed you must have gnawed he must have gnawed we must have gnawed you must have gnawed they must have gnawed
Perfecto con V-ing
I must have been gnawing you must have been gnawing he must have been gnawing we must have been gnawing you must have been gnawing they must have been gnawing
Negación
Forma simple
I mustn't gnaw you mustn't gnaw he mustn't gnaw we mustn't gnaw you mustn't gnaw they mustn't gnaw
Forma con V-ing
I mustn't be gnawing you mustn't be gnawing he mustn't be gnawing we mustn't be gnawing you mustn't be gnawing they mustn't be gnawing
Perfecto
I mustn't have gnawed you mustn't have gnawed he mustn't have gnawed we mustn't have gnawed you mustn't have gnawed they mustn't have gnawed
Perfecto con V-ing
I mustn't have been gnawing you mustn't have been gnawing he mustn't have been gnawing we mustn't have been gnawing you mustn't have been gnawing they mustn't have been gnawing
Forma interrogativa
Forma simple
must I gnaw? must you gnaw? must he gnaw? must we gnaw? must you gnaw? must they gnaw?
Forma con V-ing
must I be gnawing? must you be gnawing? must he be gnawing? must we be gnawing? must you be gnawing? must they be gnawing?
Perfecto
must I have gnawed? must you have gnawed? must he have gnawed? must we have gnawed? must you have gnawed? must they have gnawed?
Perfecto con V-ing
must I have been gnawing? must you have been gnawing? must he have been gnawing? must we have been gnawing? must you have been gnawing? must they have been gnawing?
Forma interro-negativa
Forma simple
mustn't I gnaw? mustn't you gnaw? mustn't he gnaw? mustn't we gnaw? mustn't you gnaw? mustn't they gnaw?
Forma con V-ing
mustn't I be gnawing? mustn't you be gnawing? mustn't he be gnawing? mustn't we be gnawing? mustn't you be gnawing? mustn't they be gnawing?
Perfecto
mustn't I have gnawed? mustn't you have gnawed? mustn't he have gnawed? mustn't we have gnawed? mustn't you have gnawed? mustn't they have gnawed?
Perfecto con V-ing
mustn't I have been gnawing? mustn't you have been gnawing? mustn't he have been gnawing? mustn't we have been gnawing? mustn't you have been gnawing? mustn't they have been gnawing?