YOU SAID:

I have kids in basement

INTO JAPANESE

地下室に子供たちがいる

BACK INTO ENGLISH

There are children in the basement

INTO JAPANESE

地下室には子供たちがいる

BACK INTO ENGLISH

there are kids in the basement

INTO JAPANESE

地下室に子供たちがいます

BACK INTO ENGLISH

There are children in the basement.

INTO JAPANESE

地下室には子供たちがいます。

BACK INTO ENGLISH

There are children in the basement.