YOU SAID:

When I go to the park my brother kill me.

INTO JAPANESE

私が公園に行くとき、私の兄は私を殺す。

BACK INTO ENGLISH

My brother kills me when I go to the park.

INTO JAPANESE

私が公園に行くと弟が私を殺す。

BACK INTO ENGLISH

When I go to the park, my brother kills me.

INTO JAPANESE

私が公園に行くと、兄が私を殺します。

BACK INTO ENGLISH

When I go to the park, my brother kills me.