1. right?; isn't it?; doesn't it?; don't you?; don't you think?
at sentence end; used as a request for confirmation or agreement
2. hey; say; listen; look; come on
3. you know; you see; I must say; I should think
at sentence end; used to express one's thoughts or feelings
4. will you?; please
at sentence end; used to make an informal request
5. so, ...; well, ...; you see, ...; you understand?
at the end of a non-final clause; used to draw the listener's attention to something
6. I'm not sure if ...; I have my doubts about whether ...
at sentence end after the question marker か