must disappoint
Regular verb: disappoint - disappointed- disappointed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?