それが

expression

that; it

Functions as the subject of a sentence, referring back to something previously mentioned or understood from context.

• それが私わたしの夢ゆめです。

  That is my dream.

• それが原げん因いんで遅ち刻こくした。

  That's why I was late.

expression

well, actually ...; well, unfortunately ...

Used at the beginning of a hesitant response, often to introduce a correction, an excuse, or an unfortunate fact.

• 「もう終おわった？」「それが、まだなんだ。」

  "Is it finished?" "Well, actually, not yet."

• それが、急きゅうに都つ合ごうが悪わるくなってしまって。

  Well, unfortunately, something suddenly came up.