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 mustn't have you mustn't have he mustn't have we mustn't have you mustn't have they mustn't have	I mustn't be having you mustn't be having he mustn't be having we mustn't be having you mustn't be having they mustn't be having
Perfect	V-ing perfect
I mustn't have had you mustn't have had he mustn't have had we mustn't have had you mustn't have had they mustn't have had	I mustn't have been having you mustn't have been having he mustn't have been having we mustn't have been having you mustn't have been having they mustn't 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
mustn't I have? mustn't you have? mustn't he have? mustn't we have? mustn't you have? mustn't they have?	mustn't I be having? mustn't you be having? mustn't he be having? mustn't we be having? mustn't you be having? mustn't they be having?
Perfect	V-ing perfect
mustn't I have had? mustn't you have had? mustn't he have had? mustn't we have had? mustn't you have had? mustn't they have had?	mustn't I have been having? mustn't you have been having? mustn't he have been having? mustn't we have been having? mustn't you have been having? mustn't they have been having?