must leapfrog
Regular verb: leapfrog - leapfroged- leapfroged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must leapfrog
you must leapfrog
he must leapfrog
we must leapfrog
you must leapfrog
they must leapfrog 	I must be leapfroging
you must be leapfroging
he must be leapfroging
we must be leapfroging
you must be leapfroging
they must be leapfroging	I must have leapfroged
you must have leapfroged
he must have leapfroged
we must have leapfroged
you must have leapfroged
they must have leapfroged	I must have been leapfroging
you must have been leapfroging
he must have been leapfroging
we must have been leapfroging
you must have been leapfroging
they must have been leapfroging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not leapfrog
you must not leapfrog
he must not leapfrog
we must not leapfrog
you must not leapfrog
they must not leapfrog 	I must not be leapfroging
you must not be leapfroging
he must not be leapfroging
we must not be leapfroging
you must not be leapfroging
they must not be leapfroging	I must not have leapfroged
you must not have leapfroged
he must not have leapfroged
we must not have leapfroged
you must not have leapfroged
they must not have leapfroged	I must not have been leapfroging
you must not have been leapfroging
he must not have been leapfroging
we must not have been leapfroging
you must not have been leapfroging
they must not have been leapfroging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I leapfrog?
must you leapfrog?
must he leapfrog?
must we leapfrog?
must you leapfrog?
must they leapfrog? 	must I be leapfroging?
must you be leapfroging?
must he be leapfroging?
must we be leapfroging?
must you be leapfroging?
must they be leapfroging? 	must I have leapfroged?
must you have leapfroged?
must he have leapfroged?
must we have leapfroged?
must you have leapfroged?
must they have leapfroged? 	must I have been leapfroging?
must you have been leapfroging?
must he have been leapfroging?
must we have been leapfroging?
must you have been leapfroging?
must they have been leapfroging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not leapfrog?
must you not leapfrog?
must he not leapfrog?
must we not leapfrog?
must you not leapfrog?
must they not leapfrog? 	must I not be leapfroging?
must you not be leapfroging?
must he not be leapfroging?
must we not be leapfroging?
must you not be leapfroging?
must they not be leapfroging? 	must I not have leapfroged?
must you not have leapfroged?
must he not have leapfroged?
must we not have leapfroged?
must you not have leapfroged?
must they not have leapfroged? 	must I not have been leapfroging?
must you not have been leapfroging?
must he not have been leapfroging?
must we not have been leapfroging?
must you not have been leapfroging?
must they not have been leapfroging?