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 mustn't disappoint you mustn't disappoint she mustn't disappoint we mustn't disappoint you mustn't disappoint they mustn't disappoint	I mustn't be disappointing you mustn't be disappointing she mustn't be disappointing we mustn't be disappointing you mustn't be disappointing they mustn't be disappointing
Perfect	V-ing perfect
I mustn't have disappointed you mustn't have disappointed she mustn't have disappointed we mustn't have disappointed you mustn't have disappointed they mustn't have disappointed	I mustn't have been disappointing you mustn't have been disappointing she mustn't have been disappointing we mustn't have been disappointing you mustn't have been disappointing they mustn't 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
mustn't I disappoint? mustn't you disappoint? mustn't she disappoint? mustn't we disappoint? mustn't you disappoint? mustn't they disappoint?	mustn't I be disappointing? mustn't you be disappointing? mustn't she be disappointing? mustn't we be disappointing? mustn't you be disappointing? mustn't they be disappointing?
Perfect	V-ing perfect
mustn't I have disappointed? mustn't you have disappointed? mustn't she have disappointed? mustn't we have disappointed? mustn't you have disappointed? mustn't they have disappointed?	mustn't I have been disappointing? mustn't you have been disappointing? mustn't she have been disappointing? mustn't we have been disappointing? mustn't you have been disappointing? mustn't they have been disappointing?