YOU SAID:
Wow I went to the supermarket yes yes I did
INTO JAPANESE
すごいスーパーに行ったよ
BACK INTO ENGLISH
I went to a supermarket
INTO JAPANESE
スーパーに行ってきました
BACK INTO ENGLISH
I went to the supermarket
INTO JAPANESE
スーパーに行ってきました
BACK INTO ENGLISH
I went to the supermarket
That didn't even make that much sense in English.