must leaven
Verbe régulier : leaven - leavened- leavened
Traduction française : faire lever - égayer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must leaven
you must leaven
he must leaven
we must leaven
you must leaven
they must leaven 	I must be leavening
you must be leavening
he must be leavening
we must be leavening
you must be leavening
they must be leavening	I must have leavened
you must have leavened
he must have leavened
we must have leavened
you must have leavened
they must have leavened	I must have been leavening
you must have been leavening
he must have been leavening
we must have been leavening
you must have been leavening
they must have been leavening	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't leaven
you mustn't leaven
he mustn't leaven
we mustn't leaven
you mustn't leaven
they mustn't leaven 	I mustn't be leavening
you mustn't be leavening
he mustn't be leavening
we mustn't be leavening
you mustn't be leavening
they mustn't be leavening	I mustn't have leavened
you mustn't have leavened
he mustn't have leavened
we mustn't have leavened
you mustn't have leavened
they mustn't have leavened	I mustn't have been leavening
you mustn't have been leavening
he mustn't have been leavening
we mustn't have been leavening
you mustn't have been leavening
they mustn't have been leavening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I leaven?
must you leaven?
must he leaven?
must we leaven?
must you leaven?
must they leaven? 	must I be leavening?
must you be leavening?
must he be leavening?
must we be leavening?
must you be leavening?
must they be leavening? 	must I have leavened?
must you have leavened?
must he have leavened?
must we have leavened?
must you have leavened?
must they have leavened? 	must I have been leavening?
must you have been leavening?
must he have been leavening?
must we have been leavening?
must you have been leavening?
must they have been leavening? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I leaven?
mustn't you leaven?
mustn't he leaven?
mustn't we leaven?
mustn't you leaven?
mustn't they leaven? 	mustn't I be leavening?
mustn't you be leavening?
mustn't he be leavening?
mustn't we be leavening?
mustn't you be leavening?
mustn't they be leavening? 	mustn't I have leavened?
mustn't you have leavened?
mustn't he have leavened?
mustn't we have leavened?
mustn't you have leavened?
mustn't they have leavened? 	mustn't I have been leavening?
mustn't you have been leavening?
mustn't he have been leavening?
mustn't we have been leavening?
mustn't you have been leavening?
mustn't they have been leavening?