How to say "I'm not sure"

1. 1

   ちょっとわかりません

   chotto wakarimasen

   ちょっとわかりません means 'I'm not quite sure.' The ちょっと softens it, you're not saying you have no idea, just that you're uncertain.

   Use when asked something you're unsure about, softly admitting you don't know, avoiding a hard no

   ちょっとわかりません。

   chotto wakarimasen.

   I'm not quite sure.

2. 2

   わかりません

   wakarimasen

   わかりません is the standard polite 'I don't know / I don't understand.' Direct but still polite with the ません ending.

   Use when genuinely don't know the answer, can't understand what was said, need to be direct

   わかりません。

   wakarimasen.

   I don't know. / I don't understand.

3. 3

   どうでしょう

   dō deshō

   どうでしょう means 'I wonder...' or 'hmm, hard to say.' A soft hedge when you don't want to commit. Natural in conversations where you're thinking it over.

   Use when hedging, not committing to an answer, thinking out loud, casual uncertainty

   どうでしょう。

   dō deshō.

   Hmm, I wonder... / Hard to say.

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