English verb conjugation
MUST LEAVEN

Regular verb: leaven - leavened - leavened

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I must not leaven you must not leaven he 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 he must not be leavening we must not be leavening you must not be leavening they must not be leavening
Perfect	V-ing perfect
I must not have leavened you must not have leavened he 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 he must not have been leavening we must not have been leavening you must not have been leavening they must not have been leavening

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
must I not leaven? must you not leaven? must he 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 he not be leavening? must we not be leavening? must you not be leavening? must they not be leavening?
Perfect	V-ing perfect
must I not have leavened? must you not have leavened? must he 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 he not have been leavening? must we not have been leavening? must you not have been leavening? must they not have been leavening?