YOU SAID:

Hello. Why are you all here today?

INTO JAPANESE

こんにちは。なぜあなたはすべてここで今日ですか。

BACK INTO ENGLISH

Hello. Why all of you are here today?

INTO JAPANESE

こんにちは。なぜあなたのすべてがここで今日ですか。

BACK INTO ENGLISH

Hello. Why are you all here today?

INTO JAPANESE

こんにちは。どうしてここにいるの？

BACK INTO ENGLISH

Hello. Why are you here?

INTO JAPANESE

こんにちは。なぜあなたはここにいるのですか？

BACK INTO ENGLISH

Hello. Why are you here?