I must vary you must vary he must vary we must vary you must vary they must vary
Forma com V-ing
I must be varying you must be varying he must be varying we must be varying you must be varying they must be varying
Perfeito
I must have varied you must have varied he must have varied we must have varied you must have varied they must have varied
Perfeito com V-ing
I must have been varying you must have been varying he must have been varying we must have been varying you must have been varying they must have been varying
Negação
Forma simple
I mustn't vary you mustn't vary he mustn't vary we mustn't vary you mustn't vary they mustn't vary
Forma com V-ing
I mustn't be varying you mustn't be varying he mustn't be varying we mustn't be varying you mustn't be varying they mustn't be varying
Perfeito
I mustn't have varied you mustn't have varied he mustn't have varied we mustn't have varied you mustn't have varied they mustn't have varied
Perfeito com V-ing
I mustn't have been varying you mustn't have been varying he mustn't have been varying we mustn't have been varying you mustn't have been varying they mustn't have been varying
Forma interrogativa
Forma simple
must I vary? must you vary? must he vary? must we vary? must you vary? must they vary?
Forma com V-ing
must I be varying? must you be varying? must he be varying? must we be varying? must you be varying? must they be varying?
Perfeito
must I have varied? must you have varied? must he have varied? must we have varied? must you have varied? must they have varied?
Perfeito com V-ing
must I have been varying? must you have been varying? must he have been varying? must we have been varying? must you have been varying? must they have been varying?
Forma interro-Negação
Forma simple
mustn't I vary? mustn't you vary? mustn't he vary? mustn't we vary? mustn't you vary? mustn't they vary?
Forma com V-ing
mustn't I be varying? mustn't you be varying? mustn't he be varying? mustn't we be varying? mustn't you be varying? mustn't they be varying?
Perfeito
mustn't I have varied? mustn't you have varied? mustn't he have varied? mustn't we have varied? mustn't you have varied? mustn't they have varied?
Perfeito com V-ing
mustn't I have been varying? mustn't you have been varying? mustn't he have been varying? mustn't we have been varying? mustn't you have been varying? mustn't they have been varying?