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