English verb conjugation
MUST LAUGHTER

Regular verb: laughter - laughtered - laughtered

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I must laughter you must laughter he must laughter we must laughter you must laughter they must laughter	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	V-ing 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	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

Negation

Simple form	V-ing form
I mustn't laughter you mustn't laughter he mustn't laughter we mustn't laughter you mustn't laughter they mustn't laughter	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	V-ing 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	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

Interrogative form

Simple form	V-ing form
must I laughter? must you laughter? must he laughter? must we laughter? must you laughter? must they laughter?	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	V-ing 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?	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?

Interro-negative form

Simple form	V-ing form
mustn't I laughter? mustn't you laughter? mustn't he laughter? mustn't we laughter? mustn't you laughter? mustn't they laughter?	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	V-ing 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?	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?