I must derive you must derive he must derive we must derive you must derive they must derive
Forma com V-ing
I must be deriving you must be deriving he must be deriving we must be deriving you must be deriving they must be deriving
Perfeito
I must have derived you must have derived he must have derived we must have derived you must have derived they must have derived
Perfeito com V-ing
I must have been deriving you must have been deriving he must have been deriving we must have been deriving you must have been deriving they must have been deriving
Negação
Forma simple
I mustn't derive you mustn't derive he mustn't derive we mustn't derive you mustn't derive they mustn't derive
Forma com V-ing
I mustn't be deriving you mustn't be deriving he mustn't be deriving we mustn't be deriving you mustn't be deriving they mustn't be deriving
Perfeito
I mustn't have derived you mustn't have derived he mustn't have derived we mustn't have derived you mustn't have derived they mustn't have derived
Perfeito com V-ing
I mustn't have been deriving you mustn't have been deriving he mustn't have been deriving we mustn't have been deriving you mustn't have been deriving they mustn't have been deriving
Forma interrogativa
Forma simple
must I derive? must you derive? must he derive? must we derive? must you derive? must they derive?
Forma com V-ing
must I be deriving? must you be deriving? must he be deriving? must we be deriving? must you be deriving? must they be deriving?
Perfeito
must I have derived? must you have derived? must he have derived? must we have derived? must you have derived? must they have derived?
Perfeito com V-ing
must I have been deriving? must you have been deriving? must he have been deriving? must we have been deriving? must you have been deriving? must they have been deriving?
Forma interro-Negação
Forma simple
mustn't I derive? mustn't you derive? mustn't he derive? mustn't we derive? mustn't you derive? mustn't they derive?
Forma com V-ing
mustn't I be deriving? mustn't you be deriving? mustn't he be deriving? mustn't we be deriving? mustn't you be deriving? mustn't they be deriving?
Perfeito
mustn't I have derived? mustn't you have derived? mustn't he have derived? mustn't we have derived? mustn't you have derived? mustn't they have derived?
Perfeito com V-ing
mustn't I have been deriving? mustn't you have been deriving? mustn't he have been deriving? mustn't we have been deriving? mustn't you have been deriving? mustn't they have been deriving?