must repel
Regular verb: repel - repelled- repelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must repel
you must repel
she must repel
we must repel
you must repel
they must repel 	I must be repelling
you must be repelling
she must be repelling
we must be repelling
you must be repelling
they must be repelling	I must have repelled
you must have repelled
she must have repelled
we must have repelled
you must have repelled
they must have repelled	I must have been repelling
you must have been repelling
she must have been repelling
we must have been repelling
you must have been repelling
they must have been repelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't repel
you mustn't repel
she mustn't repel
we mustn't repel
you mustn't repel
they mustn't repel 	I mustn't be repelling
you mustn't be repelling
she mustn't be repelling
we mustn't be repelling
you mustn't be repelling
they mustn't be repelling	I mustn't have repelled
you mustn't have repelled
she mustn't have repelled
we mustn't have repelled
you mustn't have repelled
they mustn't have repelled	I mustn't have been repelling
you mustn't have been repelling
she mustn't have been repelling
we mustn't have been repelling
you mustn't have been repelling
they mustn't have been repelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I repel?
must you repel?
must she repel?
must we repel?
must you repel?
must they repel? 	must I be repelling?
must you be repelling?
must she be repelling?
must we be repelling?
must you be repelling?
must they be repelling? 	must I have repelled?
must you have repelled?
must she have repelled?
must we have repelled?
must you have repelled?
must they have repelled? 	must I have been repelling?
must you have been repelling?
must she have been repelling?
must we have been repelling?
must you have been repelling?
must they have been repelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I repel?
mustn't you repel?
mustn't she repel?
mustn't we repel?
mustn't you repel?
mustn't they repel? 	mustn't I be repelling?
mustn't you be repelling?
mustn't she be repelling?
mustn't we be repelling?
mustn't you be repelling?
mustn't they be repelling? 	mustn't I have repelled?
mustn't you have repelled?
mustn't she have repelled?
mustn't we have repelled?
mustn't you have repelled?
mustn't they have repelled? 	mustn't I have been repelling?
mustn't you have been repelling?
mustn't she have been repelling?
mustn't we have been repelling?
mustn't you have been repelling?
mustn't they have been repelling?