Hmm, what Wanessa said about not being able to find slangs in dictionary is true. According to your question: な is the Japanese adjective. For example, "small" is 小さい (chiisai) but if you want to say a "small car" then you would have to change it to an adjective in Japanese. So it will be 小さな車 (chiisana kuruma). More examples=> 大きい=> 大きな, ハンサム=>ハンサムな etc... And だ is just the informal way of saying ～です. Example, これは小さな車です。=>これは 小さな車だ。 You can find a very nice explanation about な in this link: http://www.guidetojapanese.org/adjectives.html#part2 About だ, you can find some nice examples in this page. Press Ctrl+F and paste this sentence "Practice: Repeat the previous exercise, this time using informal speech." after you go to this page: http://en.wikibooks.org/wiki/Japanese/Lessons/Introduction/Konnichiwa/Noun_predicates I hope my answers were helpful (and not confusing ;P)! Please look at those links I provided when you have sufficient amount of time. Don't make yourself too busy when learning something new! See you soon. ^_^

Hi!! In these context are connective. I think "na" and "da" are coneectives. The "da" usually finish the sentence. For exemple: Sore wa nan da? / Okane wo atsumarun da / Oyatsu wa kyukei no jikan dake da. It's complicated I teach clearly here. In a few days when you learn more, you will not understand the endings of sentences containing slang. Like: "nammen jyane". Because these words are not found in the dictionary. But over the time you will learn and everything will be is easier! Good luck in japanese. (^^)/ Hugs from Brasil!