YOU SAID:
I happened to be at that party last night
INTO JAPANESE
私は昨夜そのパーティーにたまたま参加しました
BACK INTO ENGLISH
I happened to attend the party last night
INTO JAPANESE
昨夜たまたまパーティーに参加しました
BACK INTO ENGLISH
I happened to attend a party last night
INTO JAPANESE
昨夜たまたまパーティーに参加しました
BACK INTO ENGLISH
I happened to attend a party last night
Well done, yes, well done!