English verb conjugation
MUST ALTER ALTER

Regular verb: alter alter - alter altered - alter altered

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form	V-ing form
I must alter alter you must alter alter she must alter alter we must alter alter you must alter alter they must alter alter	I must be alter altering you must be alter altering she must be alter altering we must be alter altering you must be alter altering they must be alter altering
Perfect	V-ing perfect
I must have alter altered you must have alter altered she must have alter altered we must have alter altered you must have alter altered they must have alter altered	I must have been alter altering you must have been alter altering she must have been alter altering we must have been alter altering you must have been alter altering they must have been alter altering

Negation

Simple form	V-ing form
I mustn't alter alter you mustn't alter alter she mustn't alter alter we mustn't alter alter you mustn't alter alter they mustn't alter alter	I mustn't be alter altering you mustn't be alter altering she mustn't be alter altering we mustn't be alter altering you mustn't be alter altering they mustn't be alter altering
Perfect	V-ing perfect
I mustn't have alter altered you mustn't have alter altered she mustn't have alter altered we mustn't have alter altered you mustn't have alter altered they mustn't have alter altered	I mustn't have been alter altering you mustn't have been alter altering she mustn't have been alter altering we mustn't have been alter altering you mustn't have been alter altering they mustn't have been alter altering

Interrogative form

Simple form	V-ing form
must I alter alter? must you alter alter? must she alter alter? must we alter alter? must you alter alter? must they alter alter?	must I be alter altering? must you be alter altering? must she be alter altering? must we be alter altering? must you be alter altering? must they be alter altering?
Perfect	V-ing perfect
must I have alter altered? must you have alter altered? must she have alter altered? must we have alter altered? must you have alter altered? must they have alter altered?	must I have been alter altering? must you have been alter altering? must she have been alter altering? must we have been alter altering? must you have been alter altering? must they have been alter altering?

Interro-negative form

Simple form	V-ing form
mustn't I alter alter? mustn't you alter alter? mustn't she alter alter? mustn't we alter alter? mustn't you alter alter? mustn't they alter alter?	mustn't I be alter altering? mustn't you be alter altering? mustn't she be alter altering? mustn't we be alter altering? mustn't you be alter altering? mustn't they be alter altering?
Perfect	V-ing perfect
mustn't I have alter altered? mustn't you have alter altered? mustn't she have alter altered? mustn't we have alter altered? mustn't you have alter altered? mustn't they have alter altered?	mustn't I have been alter altering? mustn't you have been alter altering? mustn't she have been alter altering? mustn't we have been alter altering? mustn't you have been alter altering? mustn't they have been alter altering?