YOU SAID:

Blood still stains when the sheets are washed.

INTO JAPANESE

シーツを洗うとまだ血が染みます。

BACK INTO ENGLISH

When I wash the sheets, there is still blood stained.

INTO JAPANESE

シーツを洗うと、まだ血が染まっています。

BACK INTO ENGLISH

When I washed the sheets, they were still stained with blood.

INTO JAPANESE

私がシーツを洗ったとき、彼らはまだ血で染まっていました。

BACK INTO ENGLISH

When I washed the sheets, they were still stained with blood.