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