YOU SAID:

I am under your floorboards at this moment in time

INTO JAPANESE

私はこの時点であなたの床板の下にいます

BACK INTO ENGLISH

I'm under your floorboards at this point.

INTO JAPANESE

床板の下にいる

BACK INTO ENGLISH

They're under the floorboards.

INTO JAPANESE

床板の下だ

BACK INTO ENGLISH

Under the floorboards.

INTO JAPANESE

証拠として残してある

BACK INTO ENGLISH

Under the floorboards.