I must propel you must propel she must propel we must propel you must propel they must propel
V-ing form
I must be propelling you must be propelling she must be propelling we must be propelling you must be propelling they must be propelling
Perfect
I must have propelled you must have propelled she must have propelled we must have propelled you must have propelled they must have propelled
V-ing perfect
I must have been propelling you must have been propelling she must have been propelling we must have been propelling you must have been propelling they must have been propelling
Negation
Simple form
I mustn't propel you mustn't propel she mustn't propel we mustn't propel you mustn't propel they mustn't propel
V-ing form
I mustn't be propelling you mustn't be propelling she mustn't be propelling we mustn't be propelling you mustn't be propelling they mustn't be propelling
Perfect
I mustn't have propelled you mustn't have propelled she mustn't have propelled we mustn't have propelled you mustn't have propelled they mustn't have propelled
V-ing perfect
I mustn't have been propelling you mustn't have been propelling she mustn't have been propelling we mustn't have been propelling you mustn't have been propelling they mustn't have been propelling
Interrogative form
Simple form
must I propel? must you propel? must she propel? must we propel? must you propel? must they propel?
V-ing form
must I be propelling? must you be propelling? must she be propelling? must we be propelling? must you be propelling? must they be propelling?
Perfect
must I have propelled? must you have propelled? must she have propelled? must we have propelled? must you have propelled? must they have propelled?
V-ing perfect
must I have been propelling? must you have been propelling? must she have been propelling? must we have been propelling? must you have been propelling? must they have been propelling?
Interro-negative form
Simple form
mustn't I propel? mustn't you propel? mustn't she propel? mustn't we propel? mustn't you propel? mustn't they propel?
V-ing form
mustn't I be propelling? mustn't you be propelling? mustn't she be propelling? mustn't we be propelling? mustn't you be propelling? mustn't they be propelling?
Perfect
mustn't I have propelled? mustn't you have propelled? mustn't she have propelled? mustn't we have propelled? mustn't you have propelled? mustn't they have propelled?
V-ing perfect
mustn't I have been propelling? mustn't you have been propelling? mustn't she have been propelling? mustn't we have been propelling? mustn't you have been propelling? mustn't they have been propelling?