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
she must leaven
we must leaven
you must leaven
they must leaven 	I must be leavening
you must be leavening
she must be leavening
we must be leavening
you must be leavening
they must be leavening	I must have leavened
you must have leavened
she 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
she 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 must not leaven
you must not leaven
she must not leaven
we must not leaven
you must not leaven
they must not leaven 	I must not be leavening
you must not be leavening
she must not be leavening
we must not be leavening
you must not be leavening
they must not be leavening	I must not have leavened
you must not have leavened
she must not have leavened
we must not have leavened
you must not have leavened
they must not have leavened	I must not have been leavening
you must not have been leavening
she must not have been leavening
we must not have been leavening
you must not have been leavening
they must not have been leavening	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I leaven?
must you leaven?
must she leaven?
must we leaven?
must you leaven?
must they leaven? 	must I be leavening?
must you be leavening?
must she be leavening?
must we be leavening?
must you be leavening?
must they be leavening? 	must I have leavened?
must you have leavened?
must she 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 she 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 	
must I not leaven?
must you not leaven?
must she not leaven?
must we not leaven?
must you not leaven?
must they not leaven? 	must I not be leavening?
must you not be leavening?
must she not be leavening?
must we not be leavening?
must you not be leavening?
must they not be leavening? 	must I not have leavened?
must you not have leavened?
must she not have leavened?
must we not have leavened?
must you not have leavened?
must they not have leavened? 	must I not have been leavening?
must you not have been leavening?
must she not have been leavening?
must we not have been leavening?
must you not have been leavening?
must they not have been leavening?