English verb conjugation
MUST PREALTER

Regular verb: prealter - prealtered - prealtered

Affirmation

Simple form	V-ing form
I must prealter you must prealter she must prealter we must prealter you must prealter they must prealter	I must be prealtering you must be prealtering she 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 she 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 she 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 mustn't prealter you mustn't prealter she mustn't prealter we mustn't prealter you mustn't prealter they mustn't prealter	I mustn't be prealtering you mustn't be prealtering she mustn't be prealtering we mustn't be prealtering you mustn't be prealtering they mustn't be prealtering
Perfect	V-ing perfect
I mustn't have prealtered you mustn't have prealtered she mustn't have prealtered we mustn't have prealtered you mustn't have prealtered they mustn't have prealtered	I mustn't have been prealtering you mustn't have been prealtering she mustn't have been prealtering we mustn't have been prealtering you mustn't have been prealtering they mustn't have been prealtering

Interrogative form

Simple form	V-ing form
must I prealter? must you prealter? must she prealter? must we prealter? must you prealter? must they prealter?	must I be prealtering? must you be prealtering? must she 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 she 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 she 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
mustn't I prealter? mustn't you prealter? mustn't she prealter? mustn't we prealter? mustn't you prealter? mustn't they prealter?	mustn't I be prealtering? mustn't you be prealtering? mustn't she be prealtering? mustn't we be prealtering? mustn't you be prealtering? mustn't they be prealtering?
Perfect	V-ing perfect
mustn't I have prealtered? mustn't you have prealtered? mustn't she have prealtered? mustn't we have prealtered? mustn't you have prealtered? mustn't they have prealtered?	mustn't I have been prealtering? mustn't you have been prealtering? mustn't she have been prealtering? mustn't we have been prealtering? mustn't you have been prealtering? mustn't they have been prealtering?