English verb conjugation
MUST PREALTER

Regular verb: prealter - prealtered - prealtered

Affirmation

Simple form	V-ing form
I must prealter you must prealter he must prealter we must prealter you must prealter they must prealter	I must be prealtering you must be prealtering he must be prealtering we must be prealtering you must be prealtering they must be prealtering
Perfect	V-ing perfect
I must have prealtered you must have prealtered he must have prealtered we must have prealtered you must have prealtered they must have prealtered	I must have been prealtering you must have been prealtering he must have been prealtering we must have been prealtering you must have been prealtering they must have been prealtering

Negation

Simple form	V-ing form
I must not prealter you must not prealter he must not prealter we must not prealter you must not prealter they must not prealter	I must not be prealtering you must not be prealtering he must not be prealtering we must not be prealtering you must not be prealtering they must not be prealtering
Perfect	V-ing perfect
I must not have prealtered you must not have prealtered he must not have prealtered we must not have prealtered you must not have prealtered they must not have prealtered	I must not have been prealtering you must not have been prealtering he must not have been prealtering we must not have been prealtering you must not have been prealtering they must not have been prealtering

Interrogative form

Simple form	V-ing form
must I prealter? must you prealter? must he prealter? must we prealter? must you prealter? must they prealter?	must I be prealtering? must you be prealtering? must he be prealtering? must we be prealtering? must you be prealtering? must they be prealtering?
Perfect	V-ing perfect
must I have prealtered? must you have prealtered? must he have prealtered? must we have prealtered? must you have prealtered? must they have prealtered?	must I have been prealtering? must you have been prealtering? must he have been prealtering? must we have been prealtering? must you have been prealtering? must they have been prealtering?

Interro-negative form

Simple form	V-ing form
must I not prealter? must you not prealter? must he not prealter? must we not prealter? must you not prealter? must they not prealter?	must I not be prealtering? must you not be prealtering? must he not be prealtering? must we not be prealtering? must you not be prealtering? must they not be prealtering?
Perfect	V-ing perfect
must I not have prealtered? must you not have prealtered? must he not have prealtered? must we not have prealtered? must you not have prealtered? must they not have prealtered?	must I not have been prealtering? must you not have been prealtering? must he not have been prealtering? must we not have been prealtering? must you not have been prealtering? must they not have been prealtering?