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