Attention, ce verbe peut ne pas exister, la conjugaison est donnée à titre d'exemple.
Affirmation
Forme simple
I must laughter you must laughter he must laughter we must laughter you must laughter they must laughter
Forme en V-ing
I must be laughtering you must be laughtering he must be laughtering we must be laughtering you must be laughtering they must be laughtering
Perfect
I must have laughtered you must have laughtered he must have laughtered we must have laughtered you must have laughtered they must have laughtered
Perfect en V-ing
I must have been laughtering you must have been laughtering he must have been laughtering we must have been laughtering you must have been laughtering they must have been laughtering
Négation
Forme simple
I mustn't laughter you mustn't laughter he mustn't laughter we mustn't laughter you mustn't laughter they mustn't laughter
Forme en V-ing
I mustn't be laughtering you mustn't be laughtering he mustn't be laughtering we mustn't be laughtering you mustn't be laughtering they mustn't be laughtering
Perfect
I mustn't have laughtered you mustn't have laughtered he mustn't have laughtered we mustn't have laughtered you mustn't have laughtered they mustn't have laughtered
Perfect en V-ing
I mustn't have been laughtering you mustn't have been laughtering he mustn't have been laughtering we mustn't have been laughtering you mustn't have been laughtering they mustn't have been laughtering
Forme interrogative
Forme simple
must I laughter? must you laughter? must he laughter? must we laughter? must you laughter? must they laughter?
Forme en V-ing
must I be laughtering? must you be laughtering? must he be laughtering? must we be laughtering? must you be laughtering? must they be laughtering?
Perfect
must I have laughtered? must you have laughtered? must he have laughtered? must we have laughtered? must you have laughtered? must they have laughtered?
Perfect en V-ing
must I have been laughtering? must you have been laughtering? must he have been laughtering? must we have been laughtering? must you have been laughtering? must they have been laughtering?
Forme interro-négative
Forme simple
mustn't I laughter? mustn't you laughter? mustn't he laughter? mustn't we laughter? mustn't you laughter? mustn't they laughter?
Forme en V-ing
mustn't I be laughtering? mustn't you be laughtering? mustn't he be laughtering? mustn't we be laughtering? mustn't you be laughtering? mustn't they be laughtering?
Perfect
mustn't I have laughtered? mustn't you have laughtered? mustn't he have laughtered? mustn't we have laughtered? mustn't you have laughtered? mustn't they have laughtered?
Perfect en V-ing
mustn't I have been laughtering? mustn't you have been laughtering? mustn't he have been laughtering? mustn't we have been laughtering? mustn't you have been laughtering? mustn't they have been laughtering?