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