I can neigh you can neigh he can neigh we can neigh you can neigh they can neigh
V-ing form
I can be neighing you can be neighing he can be neighing we can be neighing you can be neighing they can be neighing
Perfect
I can have neighed you can have neighed he can have neighed we can have neighed you can have neighed they can have neighed
V-ing perfect
I can have been neighing you can have been neighing he can have been neighing we can have been neighing you can have been neighing they can have been neighing
Negation
Simple form
I cannot neigh you cannot neigh he cannot neigh we cannot neigh you cannot neigh they cannot neigh
V-ing form
I cannot be neighing you cannot be neighing he cannot be neighing we cannot be neighing you cannot be neighing they cannot be neighing
Perfect
I cannot have neighed you cannot have neighed he cannot have neighed we cannot have neighed you cannot have neighed they cannot have neighed
V-ing perfect
I cannot have been neighing you cannot have been neighing he cannot have been neighing we cannot have been neighing you cannot have been neighing they cannot have been neighing
Interrogative form
Simple form
can I neigh? can you neigh? can he neigh? can we neigh? can you neigh? can they neigh?
V-ing form
can I be neighing? can you be neighing? can he be neighing? can we be neighing? can you be neighing? can they be neighing?
Perfect
can I have neighed? can you have neighed? can he have neighed? can we have neighed? can you have neighed? can they have neighed?
V-ing perfect
can I have been neighing? can you have been neighing? can he have been neighing? can we have been neighing? can you have been neighing? can they have been neighing?
Interro-negative form
Simple form
can I not neigh? can you not neigh? can he not neigh? can we not neigh? can you not neigh? can they not neigh?
V-ing form
can I not be neighing? can you not be neighing? can he not be neighing? can we not be neighing? can you not be neighing? can they not be neighing?
Perfect
can I not have neighed? can you not have neighed? can he not have neighed? can we not have neighed? can you not have neighed? can they not have neighed?
V-ing perfect
can I not have been neighing? can you not have been neighing? can he not have been neighing? can we not have been neighing? can you not have been neighing? can they not have been neighing?