Meaning
よ adds a ‘I'm telling you’ nuance to a warning, correction, or useful new fact.
Formation
- Complete sentence + よ: 来ましたよ, 危ないですよ.
When to use it
- Useful information
- Gives the listener a fact that can help them decide what to do.
- Warning or correction
- Emphasizes a danger, a mistake, or an important change in the situation.
Example
その道は危ないですよ
That road is dangerous.
Important notes
- The force of よ depends on intonation and context: it can sound caring, confident, or insistent.
Common mistakes
- Do not add よ to every statement; without a reason, it makes speech sound too forceful.
- Use ね, not よ, when you want friendly shared agreement.