(Confusing Korean usage)

In the previous post, I said 이에요 is

right between 이에요 and 이예요.

If so, what is '예요'?

'예요' is a short word of '이에요'

However, it is only used after words ending with vowels without 받침(받침 is similar to suffixes)


책+이에요
빵+이에요
우유+예요 end with ㅠ(vowel)
나무+예요 end with ㅜ(vowel)