English verb conjugation
MUST JAB

Regular verb: jab - jabbed - jabbed

Affirmation

Simple form	V-ing form
I must jab you must jab he must jab we must jab you must jab they must jab	I must be jabbing you must be jabbing he must be jabbing we must be jabbing you must be jabbing they must be jabbing
Perfect	V-ing perfect
I must have jabbed you must have jabbed he must have jabbed we must have jabbed you must have jabbed they must have jabbed	I must have been jabbing you must have been jabbing he must have been jabbing we must have been jabbing you must have been jabbing they must have been jabbing

Negation

Simple form	V-ing form
I mustn't jab you mustn't jab he mustn't jab we mustn't jab you mustn't jab they mustn't jab	I mustn't be jabbing you mustn't be jabbing he mustn't be jabbing we mustn't be jabbing you mustn't be jabbing they mustn't be jabbing
Perfect	V-ing perfect
I mustn't have jabbed you mustn't have jabbed he mustn't have jabbed we mustn't have jabbed you mustn't have jabbed they mustn't have jabbed	I mustn't have been jabbing you mustn't have been jabbing he mustn't have been jabbing we mustn't have been jabbing you mustn't have been jabbing they mustn't have been jabbing

Interrogative form

Simple form	V-ing form
must I jab? must you jab? must he jab? must we jab? must you jab? must they jab?	must I be jabbing? must you be jabbing? must he be jabbing? must we be jabbing? must you be jabbing? must they be jabbing?
Perfect	V-ing perfect
must I have jabbed? must you have jabbed? must he have jabbed? must we have jabbed? must you have jabbed? must they have jabbed?	must I have been jabbing? must you have been jabbing? must he have been jabbing? must we have been jabbing? must you have been jabbing? must they have been jabbing?

Interro-negative form

Simple form	V-ing form
mustn't I jab? mustn't you jab? mustn't he jab? mustn't we jab? mustn't you jab? mustn't they jab?	mustn't I be jabbing? mustn't you be jabbing? mustn't he be jabbing? mustn't we be jabbing? mustn't you be jabbing? mustn't they be jabbing?
Perfect	V-ing perfect
mustn't I have jabbed? mustn't you have jabbed? mustn't he have jabbed? mustn't we have jabbed? mustn't you have jabbed? mustn't they have jabbed?	mustn't I have been jabbing? mustn't you have been jabbing? mustn't he have been jabbing? mustn't we have been jabbing? mustn't you have been jabbing? mustn't they have been jabbing?