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