could leapfrog
Regular verb: leapfrog - leapfroged- leapfroged

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

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

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

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