I must burl you must burl he must burl we must burl you must burl they must burl
Forme en V-ing
I must be burling you must be burling he must be burling we must be burling you must be burling they must be burling
Perfect
I must have burled you must have burled he 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 he 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 he 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 he 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 he 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 he 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 he burl? must we burl? must you burl? must they burl?
Forme en V-ing
must I be burling? must you be burling? must he be burling? must we be burling? must you be burling? must they be burling?
Perfect
must I have burled? must you have burled? must he 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 he 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 he 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 he 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 he 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 he have been burling? mustn't we have been burling? mustn't you have been burling? mustn't they have been burling?