YOU SAID:

hello im the worst person in the world

INTO JAPANESE

こんにちは私は、世界で最悪の人

BACK INTO ENGLISH

Hi I was the worst person in the world

INTO JAPANESE

こんにちは、私は世界で最悪の人だった

BACK INTO ENGLISH

Hi, I was the worst person in the world

INTO JAPANESE

こんにちは、私は世界で最悪の人がいた

BACK INTO ENGLISH

Hi, I was the worst person in the world