Conjugaison du verbe anglais
MUST UNDERSIGN

Verbe régulier : undersign - undersigned - undersigned

Affirmation

Forme simple	Forme en V-ing
I must undersign you must undersign she must undersign we must undersign you must undersign they must undersign	I must be undersigning you must be undersigning she must be undersigning we must be undersigning you must be undersigning they must be undersigning
Perfect	Perfect en V-ing
I must have undersigned you must have undersigned she must have undersigned we must have undersigned you must have undersigned they must have undersigned	I must have been undersigning you must have been undersigning she must have been undersigning we must have been undersigning you must have been undersigning they must have been undersigning

Négation

Forme simple	Forme en V-ing
I mustn't undersign you mustn't undersign she mustn't undersign we mustn't undersign you mustn't undersign they mustn't undersign	I mustn't be undersigning you mustn't be undersigning she mustn't be undersigning we mustn't be undersigning you mustn't be undersigning they mustn't be undersigning
Perfect	Perfect en V-ing
I mustn't have undersigned you mustn't have undersigned she mustn't have undersigned we mustn't have undersigned you mustn't have undersigned they mustn't have undersigned	I mustn't have been undersigning you mustn't have been undersigning she mustn't have been undersigning we mustn't have been undersigning you mustn't have been undersigning they mustn't have been undersigning

Forme interrogative

Forme simple	Forme en V-ing
must I undersign? must you undersign? must she undersign? must we undersign? must you undersign? must they undersign?	must I be undersigning? must you be undersigning? must she be undersigning? must we be undersigning? must you be undersigning? must they be undersigning?
Perfect	Perfect en V-ing
must I have undersigned? must you have undersigned? must she have undersigned? must we have undersigned? must you have undersigned? must they have undersigned?	must I have been undersigning? must you have been undersigning? must she have been undersigning? must we have been undersigning? must you have been undersigning? must they have been undersigning?

Forme interro-négative

Forme simple	Forme en V-ing
mustn't I undersign? mustn't you undersign? mustn't she undersign? mustn't we undersign? mustn't you undersign? mustn't they undersign?	mustn't I be undersigning? mustn't you be undersigning? mustn't she be undersigning? mustn't we be undersigning? mustn't you be undersigning? mustn't they be undersigning?
Perfect	Perfect en V-ing
mustn't I have undersigned? mustn't you have undersigned? mustn't she have undersigned? mustn't we have undersigned? mustn't you have undersigned? mustn't they have undersigned?	mustn't I have been undersigning? mustn't you have been undersigning? mustn't she have been undersigning? mustn't we have been undersigning? mustn't you have been undersigning? mustn't they have been undersigning?