yangchihago naseo chisildo sseo bonikka deo kkaekkeushan neukkimi deureosseoyo.

After brushing my teeth, I tried using dental floss too, and it felt cleaner.

Breakdown of yangchihago naseo chisildo sseo bonikka deo kkaekkeushan neukkimi deureosseoyo.

• ~이: subject particle
• ~도: additive particle
• 더: more
• 깨끗하다: clean

Questions & Answers about yangchihago naseo chisildo sseo bonikka deo kkaekkeushan neukkimi deureosseoyo.

What does 양치 mean, and why isn’t it 이를 닦고 나서?

양치 is a common shortened noun referring to brushing your teeth. The verb is 양치하다, so 양치하고 나서 means after brushing my teeth.

You could also say 이를 닦고 나서, which is more literally after brushing my teeth. The difference is mostly style:

• 양치하다 = a very common everyday expression for toothbrushing
• 이를 닦다 = also correct, a bit more literal

So this sentence is natural casual everyday Korean.

How does -고 나서 work here?

-고 나서 means after doing... and shows that one action happens first, then another happens afterward.

So:

• 양치하고 나서 = after brushing my teeth

Structure:

• verb stem + -고 나서

Examples:

• 밥 먹고 나서 공부했어요. = After eating, I studied.
• 샤워하고 나서 잤어요. = After showering, I slept.

In your sentence, it sets up the order:

1. brush teeth
2. use floss
3. realize it feels cleaner

Why is it 치실도 instead of just 치실을?