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