can frog
Regular verb: frog - froged- froged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can frog
you can frog
he can frog
we can frog
you can frog
they can frog 	I can be froging
you can be froging
he can be froging
we can be froging
you can be froging
they can be froging	I can have froged
you can have froged
he can have froged
we can have froged
you can have froged
they can have froged	I can have been froging
you can have been froging
he can have been froging
we can have been froging
you can have been froging
they can have been froging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't frog
you can't frog
he can't frog
we can't frog
you can't frog
they can't frog 	I can't be froging
you can't be froging
he can't be froging
we can't be froging
you can't be froging
they can't be froging	I can't have froged
you can't have froged
he can't have froged
we can't have froged
you can't have froged
they can't have froged	I can't have been froging
you can't have been froging
he can't have been froging
we can't have been froging
you can't have been froging
they can't have been froging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I frog?
can you frog?
can he frog?
can we frog?
can you frog?
can they frog? 	can I be froging?
can you be froging?
can he be froging?
can we be froging?
can you be froging?
can they be froging? 	can I have froged?
can you have froged?
can he have froged?
can we have froged?
can you have froged?
can they have froged? 	can I have been froging?
can you have been froging?
can he have been froging?
can we have been froging?
can you have been froging?
can they have been froging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I frog?
can't you frog?
can't he frog?
can't we frog?
can't you frog?
can't they frog? 	can't I be froging?
can't you be froging?
can't he be froging?
can't we be froging?
can't you be froging?
can't they be froging? 	can't I have froged?
can't you have froged?
can't he have froged?
can't we have froged?
can't you have froged?
can't they have froged? 	can't I have been froging?
can't you have been froging?
can't he have been froging?
can't we have been froging?
can't you have been froging?
can't they have been froging?