English verb conjugation
MUST HAVE

Irregular verb: have - had - had

Affirmation

Simple form	V-ing form
I must have you must have he must have we must have you must have they must have	I must be having you must be having he must be having we must be having you must be having they must be having
Perfect	V-ing perfect
I must have had you must have had he must have had we must have had you must have had they must have had	I must have been having you must have been having he must have been having we must have been having you must have been having they must have been having

Negation

Simple form	V-ing form
I must not have you must not have he must not have we must not have you must not have they must not have	I must not be having you must not be having he must not be having we must not be having you must not be having they must not be having
Perfect	V-ing perfect
I must not have had you must not have had he must not have had we must not have had you must not have had they must not have had	I must not have been having you must not have been having he must not have been having we must not have been having you must not have been having they must not have been having

Interrogative form

Simple form	V-ing form
must I have? must you have? must he have? must we have? must you have? must they have?	must I be having? must you be having? must he be having? must we be having? must you be having? must they be having?
Perfect	V-ing perfect
must I have had? must you have had? must he have had? must we have had? must you have had? must they have had?	must I have been having? must you have been having? must he have been having? must we have been having? must you have been having? must they have been having?

Interro-negative form

Simple form	V-ing form
must I not have? must you not have? must he not have? must we not have? must you not have? must they not have?	must I not be having? must you not be having? must he not be having? must we not be having? must you not be having? must they not be having?
Perfect	V-ing perfect
must I not have had? must you not have had? must he not have had? must we not have had? must you not have had? must they not have had?	must I not have been having? must you not have been having? must he not have been having? must we not have been having? must you not have been having? must they not have been having?