English verb conjugation
MUST FOUI

Regular verb: foui - fouied - fouied

Affirmation

Simple form	V-ing form
I must foui you must foui she must foui we must foui you must foui they must foui	I must be fouiing you must be fouiing she must be fouiing we must be fouiing you must be fouiing they must be fouiing
Perfect	V-ing perfect
I must have fouied you must have fouied she must have fouied we must have fouied you must have fouied they must have fouied	I must have been fouiing you must have been fouiing she must have been fouiing we must have been fouiing you must have been fouiing they must have been fouiing

Negation

Simple form	V-ing form
I must not foui you must not foui she must not foui we must not foui you must not foui they must not foui	I must not be fouiing you must not be fouiing she must not be fouiing we must not be fouiing you must not be fouiing they must not be fouiing
Perfect	V-ing perfect
I must not have fouied you must not have fouied she must not have fouied we must not have fouied you must not have fouied they must not have fouied	I must not have been fouiing you must not have been fouiing she must not have been fouiing we must not have been fouiing you must not have been fouiing they must not have been fouiing

Interrogative form

Simple form	V-ing form
must I foui? must you foui? must she foui? must we foui? must you foui? must they foui?	must I be fouiing? must you be fouiing? must she be fouiing? must we be fouiing? must you be fouiing? must they be fouiing?
Perfect	V-ing perfect
must I have fouied? must you have fouied? must she have fouied? must we have fouied? must you have fouied? must they have fouied?	must I have been fouiing? must you have been fouiing? must she have been fouiing? must we have been fouiing? must you have been fouiing? must they have been fouiing?

Interro-negative form

Simple form	V-ing form
must I not foui? must you not foui? must she not foui? must we not foui? must you not foui? must they not foui?	must I not be fouiing? must you not be fouiing? must she not be fouiing? must we not be fouiing? must you not be fouiing? must they not be fouiing?
Perfect	V-ing perfect
must I not have fouied? must you not have fouied? must she not have fouied? must we not have fouied? must you not have fouied? must they not have fouied?	must I not have been fouiing? must you not have been fouiing? must she not have been fouiing? must we not have been fouiing? must you not have been fouiing? must they not have been fouiing?