can leapfrog
Regular verb: leapfrog - leapfroged- leapfroged

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't leapfrog
you can't leapfrog
she can't leapfrog
we can't leapfrog
you can't leapfrog
they can't leapfrog 	I can't be leapfroging
you can't be leapfroging
she can't be leapfroging
we can't be leapfroging
you can't be leapfroging
they can't be leapfroging	I can't have leapfroged
you can't have leapfroged
she can't have leapfroged
we can't have leapfroged
you can't have leapfroged
they can't have leapfroged	I can't have been leapfroging
you can't have been leapfroging
she can't have been leapfroging
we can't have been leapfroging
you can't have been leapfroging
they can't have been leapfroging	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I leapfrog?
can't you leapfrog?
can't she leapfrog?
can't we leapfrog?
can't you leapfrog?
can't they leapfrog? 	can't I be leapfroging?
can't you be leapfroging?
can't she be leapfroging?
can't we be leapfroging?
can't you be leapfroging?
can't they be leapfroging? 	can't I have leapfroged?
can't you have leapfroged?
can't she have leapfroged?
can't we have leapfroged?
can't you have leapfroged?
can't they have leapfroged? 	can't I have been leapfroging?
can't you have been leapfroging?
can't she have been leapfroging?
can't we have been leapfroging?
can't you have been leapfroging?
can't they have been leapfroging?