I must collaborate you must collaborate she must collaborate we must collaborate you must collaborate they must collaborate
Forme en V-ing
I must be collaborating you must be collaborating she must be collaborating we must be collaborating you must be collaborating they must be collaborating
Perfect
I must have collaborated you must have collaborated she 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 she must have been collaborating we must have been collaborating you must have been collaborating they must have been collaborating
Négation
Forme simple
I must not collaborate you must not collaborate she must not collaborate we must not collaborate you must not collaborate they must not collaborate
Forme en V-ing
I must not be collaborating you must not be collaborating she must not be collaborating we must not be collaborating you must not be collaborating they must not be collaborating
Perfect
I must not have collaborated you must not have collaborated she must not have collaborated we must not have collaborated you must not have collaborated they must not have collaborated
Perfect en V-ing
I must not have been collaborating you must not have been collaborating she must not have been collaborating we must not have been collaborating you must not have been collaborating they must not have been collaborating
Forme interrogative
Forme simple
must I collaborate? must you collaborate? must she collaborate? must we collaborate? must you collaborate? must they collaborate?
Forme en V-ing
must I be collaborating? must you be collaborating? must she be collaborating? must we be collaborating? must you be collaborating? must they be collaborating?
Perfect
must I have collaborated? must you have collaborated? must she 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 she have been collaborating? must we have been collaborating? must you have been collaborating? must they have been collaborating?
Forme interro-négative
Forme simple
must I not collaborate? must you not collaborate? must she not collaborate? must we not collaborate? must you not collaborate? must they not collaborate?
Forme en V-ing
must I not be collaborating? must you not be collaborating? must she not be collaborating? must we not be collaborating? must you not be collaborating? must they not be collaborating?
Perfect
must I not have collaborated? must you not have collaborated? must she not have collaborated? must we not have collaborated? must you not have collaborated? must they not have collaborated?
Perfect en V-ing
must I not have been collaborating? must you not have been collaborating? must she not have been collaborating? must we not have been collaborating? must you not have been collaborating? must they not have been collaborating?