YOU SAID:

Boy, that was some party last night.

INTO JAPANESE

昨夜、あの男の子、それはパーティーでした。

BACK INTO ENGLISH

That boy was a party last night.

INTO JAPANESE

その少年は昨夜のパーティーでした。

BACK INTO ENGLISH

The boy was a party last night.

INTO JAPANESE

その少年は昨夜のパーティーでした。

BACK INTO ENGLISH

The boy was a party last night.