I must befriend you must befriend she must befriend we must befriend you must befriend they must befriend
Forma con V-ing
I must be befriending you must be befriending she must be befriending we must be befriending you must be befriending they must be befriending
Perfecto
I must have befriended you must have befriended she 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 she 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 she 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 she 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 she 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 she 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 she befriend? must we befriend? must you befriend? must they befriend?
Forma con V-ing
must I be befriending? must you be befriending? must she be befriending? must we be befriending? must you be befriending? must they be befriending?
Perfecto
must I have befriended? must you have befriended? must she 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 she 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 she 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 she 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 she 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 she have been befriending? mustn't we have been befriending? mustn't you have been befriending? mustn't they have been befriending?