I must assist you must assist she must assist we must assist you must assist they must assist
Forme en V-ing
I must be assisting you must be assisting she must be assisting we must be assisting you must be assisting they must be assisting
Perfect
I must have assisted you must have assisted she must have assisted we must have assisted you must have assisted they must have assisted
Perfect en V-ing
I must have been assisting you must have been assisting she must have been assisting we must have been assisting you must have been assisting they must have been assisting
Négation
Forme simple
I mustn't assist you mustn't assist she mustn't assist we mustn't assist you mustn't assist they mustn't assist
Forme en V-ing
I mustn't be assisting you mustn't be assisting she mustn't be assisting we mustn't be assisting you mustn't be assisting they mustn't be assisting
Perfect
I mustn't have assisted you mustn't have assisted she mustn't have assisted we mustn't have assisted you mustn't have assisted they mustn't have assisted
Perfect en V-ing
I mustn't have been assisting you mustn't have been assisting she mustn't have been assisting we mustn't have been assisting you mustn't have been assisting they mustn't have been assisting
Forme interrogative
Forme simple
must I assist? must you assist? must she assist? must we assist? must you assist? must they assist?
Forme en V-ing
must I be assisting? must you be assisting? must she be assisting? must we be assisting? must you be assisting? must they be assisting?
Perfect
must I have assisted? must you have assisted? must she have assisted? must we have assisted? must you have assisted? must they have assisted?
Perfect en V-ing
must I have been assisting? must you have been assisting? must she have been assisting? must we have been assisting? must you have been assisting? must they have been assisting?
Forme interro-négative
Forme simple
mustn't I assist? mustn't you assist? mustn't she assist? mustn't we assist? mustn't you assist? mustn't they assist?
Forme en V-ing
mustn't I be assisting? mustn't you be assisting? mustn't she be assisting? mustn't we be assisting? mustn't you be assisting? mustn't they be assisting?
Perfect
mustn't I have assisted? mustn't you have assisted? mustn't she have assisted? mustn't we have assisted? mustn't you have assisted? mustn't they have assisted?
Perfect en V-ing
mustn't I have been assisting? mustn't you have been assisting? mustn't she have been assisting? mustn't we have been assisting? mustn't you have been assisting? mustn't they have been assisting?