English verb conjugation
MUST FORM

Regular verb: form - formed - formed

Affirmation

Simple form	V-ing form
I must form you must form she must form we must form you must form they must form	I must be forming you must be forming she must be forming we must be forming you must be forming they must be forming
Perfect	V-ing perfect
I must have formed you must have formed she must have formed we must have formed you must have formed they must have formed	I must have been forming you must have been forming she must have been forming we must have been forming you must have been forming they must have been forming

Negation

Simple form	V-ing form
I must not form you must not form she must not form we must not form you must not form they must not form	I must not be forming you must not be forming she must not be forming we must not be forming you must not be forming they must not be forming
Perfect	V-ing perfect
I must not have formed you must not have formed she must not have formed we must not have formed you must not have formed they must not have formed	I must not have been forming you must not have been forming she must not have been forming we must not have been forming you must not have been forming they must not have been forming

Interrogative form

Simple form	V-ing form
must I form? must you form? must she form? must we form? must you form? must they form?	must I be forming? must you be forming? must she be forming? must we be forming? must you be forming? must they be forming?
Perfect	V-ing perfect
must I have formed? must you have formed? must she have formed? must we have formed? must you have formed? must they have formed?	must I have been forming? must you have been forming? must she have been forming? must we have been forming? must you have been forming? must they have been forming?

Interro-negative form

Simple form	V-ing form
must I not form? must you not form? must she not form? must we not form? must you not form? must they not form?	must I not be forming? must you not be forming? must she not be forming? must we not be forming? must you not be forming? must they not be forming?
Perfect	V-ing perfect
must I not have formed? must you not have formed? must she not have formed? must we not have formed? must you not have formed? must they not have formed?	must I not have been forming? must you not have been forming? must she not have been forming? must we not have been forming? must you not have been forming? must they not have been forming?