I must coo you must coo she must coo we must coo you must coo they must coo
Forme en V-ing
I must be cooing you must be cooing she must be cooing we must be cooing you must be cooing they must be cooing
Perfect
I must have cooed you must have cooed she 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 she 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 she 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 she 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 she 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 she 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 she coo? must we coo? must you coo? must they coo?
Forme en V-ing
must I be cooing? must you be cooing? must she be cooing? must we be cooing? must you be cooing? must they be cooing?
Perfect
must I have cooed? must you have cooed? must she 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 she 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 she 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 she 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 she 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 she have been cooing? mustn't we have been cooing? mustn't you have been cooing? mustn't they have been cooing?