我一再跟你说，出门在外要小心。 — Chinese Grammar HSK 6 flashcard

I have repeatedly told you to be careful when going out.

wǒ yīzài gēn nǐ shuō ，chūménzàiwài yào xiǎoxīn 。

Expressing "again and again" with "yizai"

Subj. + 一再 + Verb