YOU SAID:

don't bring sand to the beach

INTO JAPANESE

ビーチに砂を持参しないでください。

BACK INTO ENGLISH

Do not bring sand to the beach.

INTO JAPANESE

ビーチに砂を持っていません。

BACK INTO ENGLISH

I do not have sand on the beach.

INTO JAPANESE

私は浜辺にいた

BACK INTO ENGLISH

I was on the beach.

INTO JAPANESE

私は浜辺にいた

BACK INTO ENGLISH

I was on the beach.