English verb conjugation
COULD YAP YAP

Regular verb: yap yap - yap yaped - yap yaped

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

Affirmation

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

Negation

Simple form	V-ing form
I could not yap yap you could not yap yap he could not yap yap we could not yap yap you could not yap yap they could not yap yap	I could not be yap yaping you could not be yap yaping he could not be yap yaping we could not be yap yaping you could not be yap yaping they could not be yap yaping
Perfect	V-ing perfect
I could not have yap yaped you could not have yap yaped he could not have yap yaped we could not have yap yaped you could not have yap yaped they could not have yap yaped	I could not have been yap yaping you could not have been yap yaping he could not have been yap yaping we could not have been yap yaping you could not have been yap yaping they could not have been yap yaping

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not yap yap? could you not yap yap? could he not yap yap? could we not yap yap? could you not yap yap? could they not yap yap?	could I not be yap yaping? could you not be yap yaping? could he not be yap yaping? could we not be yap yaping? could you not be yap yaping? could they not be yap yaping?
Perfect	V-ing perfect
could I not have yap yaped? could you not have yap yaped? could he not have yap yaped? could we not have yap yaped? could you not have yap yaped? could they not have yap yaped?	could I not have been yap yaping? could you not have been yap yaping? could he not have been yap yaping? could we not have been yap yaping? could you not have been yap yaping? could they not have been yap yaping?