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