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