must rappel
Regular verb: rappel - rappeled- rappeled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rappel
you must rappel
he must rappel
we must rappel
you must rappel
they must rappel 	I must be rappeling
you must be rappeling
he must be rappeling
we must be rappeling
you must be rappeling
they must be rappeling	I must have rappeled
you must have rappeled
he must have rappeled
we must have rappeled
you must have rappeled
they must have rappeled	I must have been rappeling
you must have been rappeling
he must have been rappeling
we must have been rappeling
you must have been rappeling
they must have been rappeling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't rappel
you mustn't rappel
he mustn't rappel
we mustn't rappel
you mustn't rappel
they mustn't rappel 	I mustn't be rappeling
you mustn't be rappeling
he mustn't be rappeling
we mustn't be rappeling
you mustn't be rappeling
they mustn't be rappeling	I mustn't have rappeled
you mustn't have rappeled
he mustn't have rappeled
we mustn't have rappeled
you mustn't have rappeled
they mustn't have rappeled	I mustn't have been rappeling
you mustn't have been rappeling
he mustn't have been rappeling
we mustn't have been rappeling
you mustn't have been rappeling
they mustn't have been rappeling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I rappel?
must you rappel?
must he rappel?
must we rappel?
must you rappel?
must they rappel? 	must I be rappeling?
must you be rappeling?
must he be rappeling?
must we be rappeling?
must you be rappeling?
must they be rappeling? 	must I have rappeled?
must you have rappeled?
must he have rappeled?
must we have rappeled?
must you have rappeled?
must they have rappeled? 	must I have been rappeling?
must you have been rappeling?
must he have been rappeling?
must we have been rappeling?
must you have been rappeling?
must they have been rappeling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I rappel?
mustn't you rappel?
mustn't he rappel?
mustn't we rappel?
mustn't you rappel?
mustn't they rappel? 	mustn't I be rappeling?
mustn't you be rappeling?
mustn't he be rappeling?
mustn't we be rappeling?
mustn't you be rappeling?
mustn't they be rappeling? 	mustn't I have rappeled?
mustn't you have rappeled?
mustn't he have rappeled?
mustn't we have rappeled?
mustn't you have rappeled?
mustn't they have rappeled? 	mustn't I have been rappeling?
mustn't you have been rappeling?
mustn't he have been rappeling?
mustn't we have been rappeling?
mustn't you have been rappeling?
mustn't they have been rappeling?