よ
(Yo)
I'm telling you / emphasis; informs the listener of new information.
Connection rules
- +Sentence (any form) + よ
- +Overuse of よ can sound pushy or condescending.
- +よね combines the two: asserting while seeking confirmation ('that's right, isn't it?').
Examples
1.
あの店は安いですよ。

Ano mise wa yasui desu yo.
That store is cheap, you know.
「I'm telling you / emphasis; informs the listener of new information」
2.
電車が来ましたよ。

Densha ga ki mashi ta yo.
The train has come (I'm telling you).
「I'm telling you / emphasis; informs the listener of new information」
Practice
I'm telling you, the test is tomorrow.
___。忘れなくださいね。
Romaji also accepted