must joy
Verbe régulier : joy - joyed- joyed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must joy
you must joy
she must joy
we must joy
you must joy
they must joy 	I must be joying
you must be joying
she must be joying
we must be joying
you must be joying
they must be joying	I must have joyed
you must have joyed
she must have joyed
we must have joyed
you must have joyed
they must have joyed	I must have been joying
you must have been joying
she must have been joying
we must have been joying
you must have been joying
they must have been joying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't joy
you mustn't joy
she mustn't joy
we mustn't joy
you mustn't joy
they mustn't joy 	I mustn't be joying
you mustn't be joying
she mustn't be joying
we mustn't be joying
you mustn't be joying
they mustn't be joying	I mustn't have joyed
you mustn't have joyed
she mustn't have joyed
we mustn't have joyed
you mustn't have joyed
they mustn't have joyed	I mustn't have been joying
you mustn't have been joying
she mustn't have been joying
we mustn't have been joying
you mustn't have been joying
they mustn't have been joying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I joy?
must you joy?
must she joy?
must we joy?
must you joy?
must they joy? 	must I be joying?
must you be joying?
must she be joying?
must we be joying?
must you be joying?
must they be joying? 	must I have joyed?
must you have joyed?
must she have joyed?
must we have joyed?
must you have joyed?
must they have joyed? 	must I have been joying?
must you have been joying?
must she have been joying?
must we have been joying?
must you have been joying?
must they have been joying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I joy?
mustn't you joy?
mustn't she joy?
mustn't we joy?
mustn't you joy?
mustn't they joy? 	mustn't I be joying?
mustn't you be joying?
mustn't she be joying?
mustn't we be joying?
mustn't you be joying?
mustn't they be joying? 	mustn't I have joyed?
mustn't you have joyed?
mustn't she have joyed?
mustn't we have joyed?
mustn't you have joyed?
mustn't they have joyed? 	mustn't I have been joying?
mustn't you have been joying?
mustn't she have been joying?
mustn't we have been joying?
mustn't you have been joying?
mustn't they have been joying?