YOU SAID:
I sat on the bench with my sandwich in my left hand
INTO JAPANESE
サンドイッチを左手に置いてベンチに座った
BACK INTO ENGLISH
I sat on the bench with the sandwich on my left
INTO JAPANESE
サンドウィッチを左にしてベンチに座った
BACK INTO ENGLISH
Sitting on the bench with the sandwich left
INTO JAPANESE
サンドイッチを左にしてベンチに座って
BACK INTO ENGLISH
Sit down on the bench with the sandwich left
INTO JAPANESE
サンドイッチを左にしてベンチに座ってください
BACK INTO ENGLISH
Sit on the bench with the sandwich left
INTO JAPANESE
サンドイッチを左にしてベンチに座る
BACK INTO ENGLISH
Sit on the bench with the sandwich left
That didn't even make that much sense in English.