I posted this on Facebook:
“red”, the dictionary form is 빨갛다 [ppalgata], and the -yo form is 빨개요 [ppalgaeyo].
One person asked: I don’t get it, why?
I replied: oh you know, it’s irregular conjugation ㅎ: so with the stem form which ends with ㅎ, if the last vocal is ㅏ, it becomesㅐ. If the last vocal isㅑ, it becomesㅒ. If the last vocal isㅓ, it can beㅐ orㅔ, depending on the word. And if the last vocal isㅕ, it becomesㅖ. And you put the end -yo 요.
Understandably, that person replied: huh???
And I got to giggle. (^_^)
Just memorize that 빨갛다 becomes 빨개요. And if you need to understand why, just check the grammar section in your textbook. It’s all there.
Memorize first, understand later.
Do the effort to understand if you feel the need to understand. If you don’t, just skip the grammar explanation. Read it later, or not at all. It’s up to you. After all, you’re learning for yourself, so you can use the language for your own purpose, not to explain it to students in a classroom. ###
- How to Memorize New Korean Words (koreanvitamin.wordpress.com)