YOU SAID:
today I'll go to the supermarket
INTO JAPANESE
今日はスーパーに行きます
BACK INTO ENGLISH
I'm going to the supermarket today.
INTO JAPANESE
僕はスーパーに行くところ
BACK INTO ENGLISH
I'm going to the supermarket.
INTO JAPANESE
僕はスーパーに行くところ
BACK INTO ENGLISH
I'm going to the supermarket.
That didn't even make that much sense in English.