YOU SAID:

do not stand on the grass

INTO JAPANESE

芝生の上に立たない

BACK INTO ENGLISH

they do not stand on the lawn

INTO JAPANESE

彼らは芝生の上に立たない

BACK INTO ENGLISH

They don't stand on the lawn.

INTO JAPANESE

彼らは芝生の上に立っていません。

BACK INTO ENGLISH

They do not stand on the lawn.

INTO JAPANESE

彼らは芝生の上に立っていません。

BACK INTO ENGLISH

They do not stand on the lawn.