I must absorb you must absorb he must absorb we must absorb you must absorb they must absorb
V-ing form
I must be absorbing you must be absorbing he must be absorbing we must be absorbing you must be absorbing they must be absorbing
Perfect
I must have absorbed you must have absorbed he must have absorbed we must have absorbed you must have absorbed they must have absorbed
V-ing perfect
I must have been absorbing you must have been absorbing he must have been absorbing we must have been absorbing you must have been absorbing they must have been absorbing
Negation
Simple form
I mustn't absorb you mustn't absorb he mustn't absorb we mustn't absorb you mustn't absorb they mustn't absorb
V-ing form
I mustn't be absorbing you mustn't be absorbing he mustn't be absorbing we mustn't be absorbing you mustn't be absorbing they mustn't be absorbing
Perfect
I mustn't have absorbed you mustn't have absorbed he mustn't have absorbed we mustn't have absorbed you mustn't have absorbed they mustn't have absorbed
V-ing perfect
I mustn't have been absorbing you mustn't have been absorbing he mustn't have been absorbing we mustn't have been absorbing you mustn't have been absorbing they mustn't have been absorbing
Interrogative form
Simple form
must I absorb? must you absorb? must he absorb? must we absorb? must you absorb? must they absorb?
V-ing form
must I be absorbing? must you be absorbing? must he be absorbing? must we be absorbing? must you be absorbing? must they be absorbing?
Perfect
must I have absorbed? must you have absorbed? must he have absorbed? must we have absorbed? must you have absorbed? must they have absorbed?
V-ing perfect
must I have been absorbing? must you have been absorbing? must he have been absorbing? must we have been absorbing? must you have been absorbing? must they have been absorbing?
Interro-negative form
Simple form
mustn't I absorb? mustn't you absorb? mustn't he absorb? mustn't we absorb? mustn't you absorb? mustn't they absorb?
V-ing form
mustn't I be absorbing? mustn't you be absorbing? mustn't he be absorbing? mustn't we be absorbing? mustn't you be absorbing? mustn't they be absorbing?
Perfect
mustn't I have absorbed? mustn't you have absorbed? mustn't he have absorbed? mustn't we have absorbed? mustn't you have absorbed? mustn't they have absorbed?
V-ing perfect
mustn't I have been absorbing? mustn't you have been absorbing? mustn't he have been absorbing? mustn't we have been absorbing? mustn't you have been absorbing? mustn't they have been absorbing?