YOU SAID:

i will keep you in the basement

INTO JAPANESE

私はあなたを地下室に保管します

BACK INTO ENGLISH

I'll keep you in the basement.

INTO JAPANESE

地下室にいてあげる

BACK INTO ENGLISH

I'll stay in the basement.

INTO JAPANESE

私は地下室にいます。

BACK INTO ENGLISH

I'm in the basement.

INTO JAPANESE

今、地下室よ

BACK INTO ENGLISH

I'm in the basement.