can yap yap
Regular verb: yap yap - yap yaped- yap yaped

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can yap yap
you can yap yap
he can yap yap
we can yap yap
you can yap yap
they can yap yap 	I can be yap yaping
you can be yap yaping
he can be yap yaping
we can be yap yaping
you can be yap yaping
they can be yap yaping	I can have yap yaped
you can have yap yaped
he can have yap yaped
we can have yap yaped
you can have yap yaped
they can have yap yaped	I can have been yap yaping
you can have been yap yaping
he can have been yap yaping
we can have been yap yaping
you can have been yap yaping
they can have been yap yaping	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't yap yap
you can't yap yap
he can't yap yap
we can't yap yap
you can't yap yap
they can't yap yap 	I can't be yap yaping
you can't be yap yaping
he can't be yap yaping
we can't be yap yaping
you can't be yap yaping
they can't be yap yaping	I can't have yap yaped
you can't have yap yaped
he can't have yap yaped
we can't have yap yaped
you can't have yap yaped
they can't have yap yaped	I can't have been yap yaping
you can't have been yap yaping
he can't have been yap yaping
we can't have been yap yaping
you can't have been yap yaping
they can't have been yap yaping	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I yap yap?
can you yap yap?
can he yap yap?
can we yap yap?
can you yap yap?
can they yap yap? 	can I be yap yaping?
can you be yap yaping?
can he be yap yaping?
can we be yap yaping?
can you be yap yaping?
can they be yap yaping? 	can I have yap yaped?
can you have yap yaped?
can he have yap yaped?
can we have yap yaped?
can you have yap yaped?
can they have yap yaped? 	can I have been yap yaping?
can you have been yap yaping?
can he have been yap yaping?
can we have been yap yaping?
can you have been yap yaping?
can they have been yap yaping? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I yap yap?
can't you yap yap?
can't he yap yap?
can't we yap yap?
can't you yap yap?
can't they yap yap? 	can't I be yap yaping?
can't you be yap yaping?
can't he be yap yaping?
can't we be yap yaping?
can't you be yap yaping?
can't they be yap yaping? 	can't I have yap yaped?
can't you have yap yaped?
can't he have yap yaped?
can't we have yap yaped?
can't you have yap yaped?
can't they have yap yaped? 	can't I have been yap yaping?
can't you have been yap yaping?
can't he have been yap yaping?
can't we have been yap yaping?
can't you have been yap yaping?
can't they have been yap yaping?