YOU SAID:

I am going to go to the supermarket to pick up groceries.

INTO JAPANESE

スーパーに行って食料品を買いに行きます。

BACK INTO ENGLISH

I go to the supermarket to buy groceries.

INTO JAPANESE

私は食料品を買うためにスーパーマーケットに行きます。

BACK INTO ENGLISH

I go to the supermarket to buy groceries.