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