YOU SAID:

I need to tell you about the event I'm going to next sunday

INTO JAPANESE

次の日曜日をつもりイベントをご紹介したいのですが。

BACK INTO ENGLISH

That is going to next Sunday, wanted to introduce the event.

INTO JAPANESE

起こっている次の日曜日にイベントを紹介したいです。

BACK INTO ENGLISH

You want to introduce the events happening next Sunday.

INTO JAPANESE

あなたは次の日曜日の出来事を紹介したいと思います。

BACK INTO ENGLISH

Would you like to introduce following Sunday's incident.

INTO JAPANESE

あなたは次の日曜日の事件を紹介したいです。

BACK INTO ENGLISH

You want to introduce the incident next Sunday.

INTO JAPANESE

あなたは次の日曜日に事件を紹介したいと思う。

BACK INTO ENGLISH

You want to introduce the incident next Sunday.