particle:

• such things as ...; and ... and - used for non-exhaustive lists related to a specific time and place
• the minute (that) ...; no sooner than ...; as soon as - after the dictionary form of a verb ➜ や否や

unclassified:

• be; is - plain copula - Kansai dialect ➜ だ

interjection:

• o; oh - punctuational exclamation in haiku, renga, etc.
• huh; what - interjection expressing surprise
• hi - male language
• yes; what? - archaism

particle:

• yes?; no?; is it?; isn't it? - indicates a question - archaism