English verb conjugation
MUST LEAVE

Irregular verb: leave - left - left

Affirmation

Simple form	V-ing form
I must leave you must leave he must leave we must leave you must leave they must leave	I must be leaving you must be leaving he must be leaving we must be leaving you must be leaving they must be leaving
Perfect	V-ing perfect
I must have left you must have left he must have left we must have left you must have left they must have left	I must have been leaving you must have been leaving he must have been leaving we must have been leaving you must have been leaving they must have been leaving

Negation

Simple form	V-ing form
I mustn't leave you mustn't leave he mustn't leave we mustn't leave you mustn't leave they mustn't leave	I mustn't be leaving you mustn't be leaving he mustn't be leaving we mustn't be leaving you mustn't be leaving they mustn't be leaving
Perfect	V-ing perfect
I mustn't have left you mustn't have left he mustn't have left we mustn't have left you mustn't have left they mustn't have left	I mustn't have been leaving you mustn't have been leaving he mustn't have been leaving we mustn't have been leaving you mustn't have been leaving they mustn't have been leaving

Interrogative form

Simple form	V-ing form
must I leave? must you leave? must he leave? must we leave? must you leave? must they leave?	must I be leaving? must you be leaving? must he be leaving? must we be leaving? must you be leaving? must they be leaving?
Perfect	V-ing perfect
must I have left? must you have left? must he have left? must we have left? must you have left? must they have left?	must I have been leaving? must you have been leaving? must he have been leaving? must we have been leaving? must you have been leaving? must they have been leaving?

Interro-negative form

Simple form	V-ing form
mustn't I leave? mustn't you leave? mustn't he leave? mustn't we leave? mustn't you leave? mustn't they leave?	mustn't I be leaving? mustn't you be leaving? mustn't he be leaving? mustn't we be leaving? mustn't you be leaving? mustn't they be leaving?
Perfect	V-ing perfect
mustn't I have left? mustn't you have left? mustn't he have left? mustn't we have left? mustn't you have left? mustn't they have left?	mustn't I have been leaving? mustn't you have been leaving? mustn't he have been leaving? mustn't we have been leaving? mustn't you have been leaving? mustn't they have been leaving?