I must lighten you must lighten he must lighten we must lighten you must lighten they must lighten
Forme en V-ing
I must be lightening you must be lightening he must be lightening we must be lightening you must be lightening they must be lightening
Perfect
I must have lightened you must have lightened he must have lightened we must have lightened you must have lightened they must have lightened
Perfect en V-ing
I must have been lightening you must have been lightening he must have been lightening we must have been lightening you must have been lightening they must have been lightening
Négation
Forme simple
I mustn't lighten you mustn't lighten he mustn't lighten we mustn't lighten you mustn't lighten they mustn't lighten
Forme en V-ing
I mustn't be lightening you mustn't be lightening he mustn't be lightening we mustn't be lightening you mustn't be lightening they mustn't be lightening
Perfect
I mustn't have lightened you mustn't have lightened he mustn't have lightened we mustn't have lightened you mustn't have lightened they mustn't have lightened
Perfect en V-ing
I mustn't have been lightening you mustn't have been lightening he mustn't have been lightening we mustn't have been lightening you mustn't have been lightening they mustn't have been lightening
Forme interrogative
Forme simple
must I lighten? must you lighten? must he lighten? must we lighten? must you lighten? must they lighten?
Forme en V-ing
must I be lightening? must you be lightening? must he be lightening? must we be lightening? must you be lightening? must they be lightening?
Perfect
must I have lightened? must you have lightened? must he have lightened? must we have lightened? must you have lightened? must they have lightened?
Perfect en V-ing
must I have been lightening? must you have been lightening? must he have been lightening? must we have been lightening? must you have been lightening? must they have been lightening?
Forme interro-négative
Forme simple
mustn't I lighten? mustn't you lighten? mustn't he lighten? mustn't we lighten? mustn't you lighten? mustn't they lighten?
Forme en V-ing
mustn't I be lightening? mustn't you be lightening? mustn't he be lightening? mustn't we be lightening? mustn't you be lightening? mustn't they be lightening?
Perfect
mustn't I have lightened? mustn't you have lightened? mustn't he have lightened? mustn't we have lightened? mustn't you have lightened? mustn't they have lightened?
Perfect en V-ing
mustn't I have been lightening? mustn't you have been lightening? mustn't he have been lightening? mustn't we have been lightening? mustn't you have been lightening? mustn't they have been lightening?