YOU SAID:

I went to a party last night with chad

INTO JAPANESE

昨日の夜、チャドとパーティーに行きました

BACK INTO ENGLISH

I went to a party with Chad last night.

INTO JAPANESE

昨日の夜、チャドとパーティーに行きました。

BACK INTO ENGLISH

Last night, Chad and I went to a party.

INTO JAPANESE

昨夜、チャドと私はパーティーに行きました。

BACK INTO ENGLISH

Last night, Chad and I went to a party.