This particle add emphasis to the word it's attached to and means "also", "even", "indeed", or "too". Like 만, it can be attached to almost any word in a sentence. Examples: 시험도 봤다./I took the test too. 얼마 먹지도 못했습니다./I didn't even eat that much 술을 많이도 먹는데요./You do indeed drink a lot of alcohol!

Both have the same meaning of "yet" or "still", but 아직도 places a more stronger emphasis or more emotional weight, such as in English where you capitalize certain words to make them stand out more. Example: 아직도 배고프 = I'm STILL hungry

그래요! 나는 한국어를 8개월 전에 공부를 한 거 시작했어요. Ojala algun día pueda hablar asi de bien como tu :p

me alegro!! JAJA llevo 3 año estudiando español! y de nada guapísima jejeje (:

스페인어 잘 하구나! ^_^ 얼마나 오래는 스페인어 공부를 하세요? Gracias por tu ayuda, es la respuesta más practica jajaja