YOU SAID:

when I played outside, I got hurt because of my friend.

INTO JAPANESE

外で遊んだ時、友達のせいで怪我をした。

BACK INTO ENGLISH

When I played outside, I got hurt because of my friends.

INTO JAPANESE

外で遊んだ時、友達のせいで怪我をしました。

BACK INTO ENGLISH

When I played outside, I got hurt because of my friends.