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 must not alter alter you must not alter alter she must not alter alter we must not alter alter you must not alter alter they must not alter alter	I must not be alter altering you must not be alter altering she must not be alter altering we must not be alter altering you must not be alter altering they must not be alter altering
Perfect	V-ing perfect
I must not have alter altered you must not have alter altered she must not have alter altered we must not have alter altered you must not have alter altered they must not have alter altered	I must not have been alter altering you must not have been alter altering she must not have been alter altering we must not have been alter altering you must not have been alter altering they must not 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
must I not alter alter? must you not alter alter? must she not alter alter? must we not alter alter? must you not alter alter? must they not alter alter?	must I not be alter altering? must you not be alter altering? must she not be alter altering? must we not be alter altering? must you not be alter altering? must they not be alter altering?
Perfect	V-ing perfect
must I not have alter altered? must you not have alter altered? must she not have alter altered? must we not have alter altered? must you not have alter altered? must they not have alter altered?	must I not have been alter altering? must you not have been alter altering? must she not have been alter altering? must we not have been alter altering? must you not have been alter altering? must they not have been alter altering?