again and again用一般現在時和一般過去時態。
again and again 反覆地、屢次的、一再地
They keep making the same mistake again and again.
他們一再地犯同樣的錯誤。
The police asked us again and again to describe exactly what happened.
警方一再地要求我們描述(當時)確切發生了什麼。