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 must not swim you must not swim she must not swim we must not swim you must not swim they must not swim
Forma con V-ing
I must not be swimming you must not be swimming she must not be swimming we must not be swimming you must not be swimming they must not be swimming
Perfecto
I must not have swum you must not have swum she must not have swum we must not have swum you must not have swum they must not have swum
Perfecto con V-ing
I must not have been swimming you must not have been swimming she must not have been swimming we must not have been swimming you must not have been swimming they must not 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
must I not swim? must you not swim? must she not swim? must we not swim? must you not swim? must they not swim?
Forma con V-ing
must I not be swimming? must you not be swimming? must she not be swimming? must we not be swimming? must you not be swimming? must they not be swimming?
Perfecto
must I not have swum? must you not have swum? must she not have swum? must we not have swum? must you not have swum? must they not have swum?
Perfecto con V-ing
must I not have been swimming? must you not have been swimming? must she not have been swimming? must we not have been swimming? must you not have been swimming? must they not have been swimming?