Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must expire expire you must expire expire he must expire expire we must expire expire you must expire expire they must expire expire
V-ing form
I must be expire expiring you must be expire expiring he must be expire expiring we must be expire expiring you must be expire expiring they must be expire expiring
Perfect
I must have expire expired you must have expire expired he must have expire expired we must have expire expired you must have expire expired they must have expire expired
V-ing perfect
I must have been expire expiring you must have been expire expiring he must have been expire expiring we must have been expire expiring you must have been expire expiring they must have been expire expiring
Negation
Simple form
I must not expire expire you must not expire expire he must not expire expire we must not expire expire you must not expire expire they must not expire expire
V-ing form
I must not be expire expiring you must not be expire expiring he must not be expire expiring we must not be expire expiring you must not be expire expiring they must not be expire expiring
Perfect
I must not have expire expired you must not have expire expired he must not have expire expired we must not have expire expired you must not have expire expired they must not have expire expired
V-ing perfect
I must not have been expire expiring you must not have been expire expiring he must not have been expire expiring we must not have been expire expiring you must not have been expire expiring they must not have been expire expiring
Interrogative form
Simple form
must I expire expire? must you expire expire? must he expire expire? must we expire expire? must you expire expire? must they expire expire?
V-ing form
must I be expire expiring? must you be expire expiring? must he be expire expiring? must we be expire expiring? must you be expire expiring? must they be expire expiring?
Perfect
must I have expire expired? must you have expire expired? must he have expire expired? must we have expire expired? must you have expire expired? must they have expire expired?
V-ing perfect
must I have been expire expiring? must you have been expire expiring? must he have been expire expiring? must we have been expire expiring? must you have been expire expiring? must they have been expire expiring?
Interro-negative form
Simple form
must I not expire expire? must you not expire expire? must he not expire expire? must we not expire expire? must you not expire expire? must they not expire expire?
V-ing form
must I not be expire expiring? must you not be expire expiring? must he not be expire expiring? must we not be expire expiring? must you not be expire expiring? must they not be expire expiring?
Perfect
must I not have expire expired? must you not have expire expired? must he not have expire expired? must we not have expire expired? must you not have expire expired? must they not have expire expired?
V-ing perfect
must I not have been expire expiring? must you not have been expire expiring? must he not have been expire expiring? must we not have been expire expiring? must you not have been expire expiring? must they not have been expire expiring?