Japanese End Of Sentence Particles

Question 1

よ

Answer 1

Yo (yo)

It is a nuanced way of speaking which in English would be something like “I tell you” or “you know.” By using it you make the assumption that you are supplying the listener with a new information or something they may not know.

Examples
1. 俺は二十歳だよ　(I am 20, you know).
2. “I already at at the office, you know.”
3. “I just broke up with my boyfriend, you know.”

Use cases:
1. Someone says “Oh he’s only 18 so he cannot drink.”

Question 2

です

Answer 2

Adjective/Verb

It is (desu; pronounced dess)

ゆきさんです。(This is Yuki-san)

はやとです。(I am Hayato)