must laugh
Verbe régulier : laugh - laughed- laughed
Traduction française : rire - rire 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must laugh
you must laugh
she must laugh
we must laugh
you must laugh
they must laugh 	I must be laughing
you must be laughing
she must be laughing
we must be laughing
you must be laughing
they must be laughing	I must have laughed
you must have laughed
she must have laughed
we must have laughed
you must have laughed
they must have laughed	I must have been laughing
you must have been laughing
she must have been laughing
we must have been laughing
you must have been laughing
they must have been laughing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't laugh
you mustn't laugh
she mustn't laugh
we mustn't laugh
you mustn't laugh
they mustn't laugh 	I mustn't be laughing
you mustn't be laughing
she mustn't be laughing
we mustn't be laughing
you mustn't be laughing
they mustn't be laughing	I mustn't have laughed
you mustn't have laughed
she mustn't have laughed
we mustn't have laughed
you mustn't have laughed
they mustn't have laughed	I mustn't have been laughing
you mustn't have been laughing
she mustn't have been laughing
we mustn't have been laughing
you mustn't have been laughing
they mustn't have been laughing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I laugh?
must you laugh?
must she laugh?
must we laugh?
must you laugh?
must they laugh? 	must I be laughing?
must you be laughing?
must she be laughing?
must we be laughing?
must you be laughing?
must they be laughing? 	must I have laughed?
must you have laughed?
must she have laughed?
must we have laughed?
must you have laughed?
must they have laughed? 	must I have been laughing?
must you have been laughing?
must she have been laughing?
must we have been laughing?
must you have been laughing?
must they have been laughing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I laugh?
mustn't you laugh?
mustn't she laugh?
mustn't we laugh?
mustn't you laugh?
mustn't they laugh? 	mustn't I be laughing?
mustn't you be laughing?
mustn't she be laughing?
mustn't we be laughing?
mustn't you be laughing?
mustn't they be laughing? 	mustn't I have laughed?
mustn't you have laughed?
mustn't she have laughed?
mustn't we have laughed?
mustn't you have laughed?
mustn't they have laughed? 	mustn't I have been laughing?
mustn't you have been laughing?
mustn't she have been laughing?
mustn't we have been laughing?
mustn't you have been laughing?
mustn't they have been laughing?