English verb conjugation
MUST AFTER

Regular verb: after - aftered - aftered

Affirmation

Simple form	V-ing form
I must after you must after he must after we must after you must after they must after	I must be aftering you must be aftering he must be aftering we must be aftering you must be aftering they must be aftering
Perfect	V-ing perfect
I must have aftered you must have aftered he must have aftered we must have aftered you must have aftered they must have aftered	I must have been aftering you must have been aftering he must have been aftering we must have been aftering you must have been aftering they must have been aftering

Negation

Simple form	V-ing form
I must not after you must not after he must not after we must not after you must not after they must not after	I must not be aftering you must not be aftering he must not be aftering we must not be aftering you must not be aftering they must not be aftering
Perfect	V-ing perfect
I must not have aftered you must not have aftered he must not have aftered we must not have aftered you must not have aftered they must not have aftered	I must not have been aftering you must not have been aftering he must not have been aftering we must not have been aftering you must not have been aftering they must not have been aftering

Interrogative form

Simple form	V-ing form
must I after? must you after? must he after? must we after? must you after? must they after?	must I be aftering? must you be aftering? must he be aftering? must we be aftering? must you be aftering? must they be aftering?
Perfect	V-ing perfect
must I have aftered? must you have aftered? must he have aftered? must we have aftered? must you have aftered? must they have aftered?	must I have been aftering? must you have been aftering? must he have been aftering? must we have been aftering? must you have been aftering? must they have been aftering?

Interro-negative form

Simple form	V-ing form
must I not after? must you not after? must he not after? must we not after? must you not after? must they not after?	must I not be aftering? must you not be aftering? must he not be aftering? must we not be aftering? must you not be aftering? must they not be aftering?
Perfect	V-ing perfect
must I not have aftered? must you not have aftered? must he not have aftered? must we not have aftered? must you not have aftered? must they not have aftered?	must I not have been aftering? must you not have been aftering? must he not have been aftering? must we not have been aftering? must you not have been aftering? must they not have been aftering?