particle
sentence-ending particle (emphasis, assertion)
grammatical
1. assertion, emphasis
Used to assert information that the speaker believes the listener doesn't know or to emphasize a point.
It's raining, you know.
It's time already!
これ、おいしいよ。
This is delicious, you know.
2. giving advice or commands
Adds emphasis to suggestions, advice, or gentle commands.
Wake up early!
()をつけてよ。
Be careful, will you?

よ is used to assert or emphasize information.

Functions

1. Assertion: ()てるよ (I know [assertive])
2. New information: 電車(でんしゃ)()よ (The train has come!)
3. Emphasis: 本当(ほんとう)だよ (It's true!)
4. Advice/urging: ()なよ (Go ahead and eat)

Contrast: よ vs

  • よ: asserts information the listener may not know
  • : seeks agreement, confirms shared knowledge

Combination:

  • Combines assertion with seeking agreement: そうだよ (That's right, you know?)