YOU SAID:

i have lots of friends in my basement

INTO JAPANESE

地下室にはたくさんの友達がいます

BACK INTO ENGLISH

I have many friends in the basement

INTO JAPANESE

地下にはたくさんの友達がいる

BACK INTO ENGLISH

I have many friends underground

INTO JAPANESE

地下にたくさんの友達がいる

BACK INTO ENGLISH

I have many friends underground