YOU SAID:

i went to the store yesterday and someone got mad

INTO JAPANESE

昨日店に行ったら誰かが怒ってた

BACK INTO ENGLISH

When I went to the store yesterday, someone was angry.

INTO JAPANESE

昨日お店に行ったら誰かが怒っていました。

BACK INTO ENGLISH

When I went to the store yesterday, someone was angry.