I must obscure you must obscure she must obscure we must obscure you must obscure they must obscure
Forme en V-ing
I must be obscuring you must be obscuring she must be obscuring we must be obscuring you must be obscuring they must be obscuring
Perfect
I must have obscured you must have obscured she must have obscured we must have obscured you must have obscured they must have obscured
Perfect en V-ing
I must have been obscuring you must have been obscuring she must have been obscuring we must have been obscuring you must have been obscuring they must have been obscuring
Négation
Forme simple
I mustn't obscure you mustn't obscure she mustn't obscure we mustn't obscure you mustn't obscure they mustn't obscure
Forme en V-ing
I mustn't be obscuring you mustn't be obscuring she mustn't be obscuring we mustn't be obscuring you mustn't be obscuring they mustn't be obscuring
Perfect
I mustn't have obscured you mustn't have obscured she mustn't have obscured we mustn't have obscured you mustn't have obscured they mustn't have obscured
Perfect en V-ing
I mustn't have been obscuring you mustn't have been obscuring she mustn't have been obscuring we mustn't have been obscuring you mustn't have been obscuring they mustn't have been obscuring
Forme interrogative
Forme simple
must I obscure? must you obscure? must she obscure? must we obscure? must you obscure? must they obscure?
Forme en V-ing
must I be obscuring? must you be obscuring? must she be obscuring? must we be obscuring? must you be obscuring? must they be obscuring?
Perfect
must I have obscured? must you have obscured? must she have obscured? must we have obscured? must you have obscured? must they have obscured?
Perfect en V-ing
must I have been obscuring? must you have been obscuring? must she have been obscuring? must we have been obscuring? must you have been obscuring? must they have been obscuring?
Forme interro-négative
Forme simple
mustn't I obscure? mustn't you obscure? mustn't she obscure? mustn't we obscure? mustn't you obscure? mustn't they obscure?
Forme en V-ing
mustn't I be obscuring? mustn't you be obscuring? mustn't she be obscuring? mustn't we be obscuring? mustn't you be obscuring? mustn't they be obscuring?
Perfect
mustn't I have obscured? mustn't you have obscured? mustn't she have obscured? mustn't we have obscured? mustn't you have obscured? mustn't they have obscured?
Perfect en V-ing
mustn't I have been obscuring? mustn't you have been obscuring? mustn't she have been obscuring? mustn't we have been obscuring? mustn't you have been obscuring? mustn't they have been obscuring?