problem with the ~도 particle so my friend came across this sentence in her homework and we couldn't really get why the ~도 particle was used after 하이힐. we are aware that it is an additive particle but we can't tell what is adding to what (It's probably really obvious but we're a bit confused lol) the sentence is: 백화점에서는 지금 세일하고 있어서 예쁜 하이힐도 많이 있어요. thanksss