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