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