YOU SAID:

My leg did the sponge

INTO JAPANESE

私の足はスポンジをした

BACK INTO ENGLISH

My feet were sponged

INTO JAPANESE

私の足はスポンジで覆われていました

BACK INTO ENGLISH

My legs were covered with a sponge

INTO JAPANESE

私の足はスポンジで覆われていた

BACK INTO ENGLISH

My feet were covered with sponge

INTO JAPANESE

私の足はスポンジで覆われていた

BACK INTO ENGLISH

My feet were covered with sponge