English verb conjugation
COULD NEIGH

Regular verb: neigh - neighed - neighed

Affirmation

Simple form	V-ing form
I could neigh you could neigh he could neigh we could neigh you could neigh they could neigh	I could be neighing you could be neighing he could be neighing we could be neighing you could be neighing they could be neighing
Perfect	V-ing perfect
I could have neighed you could have neighed he could have neighed we could have neighed you could have neighed they could have neighed	I could have been neighing you could have been neighing he could have been neighing we could have been neighing you could have been neighing they could have been neighing

Negation

Simple form	V-ing form
I could not neigh you could not neigh he could not neigh we could not neigh you could not neigh they could not neigh	I could not be neighing you could not be neighing he could not be neighing we could not be neighing you could not be neighing they could not be neighing
Perfect	V-ing perfect
I could not have neighed you could not have neighed he could not have neighed we could not have neighed you could not have neighed they could not have neighed	I could not have been neighing you could not have been neighing he could not have been neighing we could not have been neighing you could not have been neighing they could not have been neighing

Interrogative form

Simple form	V-ing form
could I neigh? could you neigh? could he neigh? could we neigh? could you neigh? could they neigh?	could I be neighing? could you be neighing? could he be neighing? could we be neighing? could you be neighing? could they be neighing?
Perfect	V-ing perfect
could I have neighed? could you have neighed? could he have neighed? could we have neighed? could you have neighed? could they have neighed?	could I have been neighing? could you have been neighing? could he have been neighing? could we have been neighing? could you have been neighing? could they have been neighing?

Interro-negative form

Simple form	V-ing form
could I not neigh? could you not neigh? could he not neigh? could we not neigh? could you not neigh? could they not neigh?	could I not be neighing? could you not be neighing? could he not be neighing? could we not be neighing? could you not be neighing? could they not be neighing?
Perfect	V-ing perfect
could I not have neighed? could you not have neighed? could he not have neighed? could we not have neighed? could you not have neighed? could they not have neighed?	could I not have been neighing? could you not have been neighing? could he not have been neighing? could we not have been neighing? could you not have been neighing? could they not have been neighing?