YOU SAID:

I went to the store for frozen peas

INTO JAPANESE

冷凍エンドウ豆を買いに店に行きました

BACK INTO ENGLISH

I went to the store to buy frozen peas.

INTO JAPANESE

冷凍エンドウ豆を買うために店に行きました。

BACK INTO ENGLISH

I went to the store to buy frozen peas.