Japanese words actualy made up of combos?

Oyasuminasai;

This is very OBVIOUS, but I didn't really know... Japanese words are actually Kana combos and single characters? I completely understand, but may someone be so kind as to toss in some examples of these, and also some that incorporate Hiragana, Katakana, and maby some Kanji (if any)? So I might at least get a more firm grasp on sentence construction, etc... It would be MUCH appreceated (+ KARMA)!!

[THIS WAS ACTUALLY BLOCKING ME FROM FURTHER UNDERSTANDING ON READING/WRITING NIHONGO!]

Doomo arigatou gozaimasu!

You're conflating the language and the orthography, a very common thing.

Is that a bad thing to do?