English verb conjugation
MUST DISAPPOINT

Regular verb: disappoint - disappointed - disappointed

Affirmation

Simple form	V-ing form
I must disappoint you must disappoint she must disappoint we must disappoint you must disappoint they must disappoint	I must be disappointing you must be disappointing she must be disappointing we must be disappointing you must be disappointing they must be disappointing
Perfect	V-ing perfect
I must have disappointed you must have disappointed she must have disappointed we must have disappointed you must have disappointed they must have disappointed	I must have been disappointing you must have been disappointing she must have been disappointing we must have been disappointing you must have been disappointing they must have been disappointing

Negation

Simple form	V-ing form
I must not disappoint you must not disappoint she must not disappoint we must not disappoint you must not disappoint they must not disappoint	I must not be disappointing you must not be disappointing she must not be disappointing we must not be disappointing you must not be disappointing they must not be disappointing
Perfect	V-ing perfect
I must not have disappointed you must not have disappointed she must not have disappointed we must not have disappointed you must not have disappointed they must not have disappointed	I must not have been disappointing you must not have been disappointing she must not have been disappointing we must not have been disappointing you must not have been disappointing they must not have been disappointing

Interrogative form

Simple form	V-ing form
must I disappoint? must you disappoint? must she disappoint? must we disappoint? must you disappoint? must they disappoint?	must I be disappointing? must you be disappointing? must she be disappointing? must we be disappointing? must you be disappointing? must they be disappointing?
Perfect	V-ing perfect
must I have disappointed? must you have disappointed? must she have disappointed? must we have disappointed? must you have disappointed? must they have disappointed?	must I have been disappointing? must you have been disappointing? must she have been disappointing? must we have been disappointing? must you have been disappointing? must they have been disappointing?

Interro-negative form

Simple form	V-ing form
must I not disappoint? must you not disappoint? must she not disappoint? must we not disappoint? must you not disappoint? must they not disappoint?	must I not be disappointing? must you not be disappointing? must she not be disappointing? must we not be disappointing? must you not be disappointing? must they not be disappointing?
Perfect	V-ing perfect
must I not have disappointed? must you not have disappointed? must she not have disappointed? must we not have disappointed? must you not have disappointed? must they not have disappointed?	must I not have been disappointing? must you not have been disappointing? must she not have been disappointing? must we not have been disappointing? must you not have been disappointing? must they not have been disappointing?