中式英文：

My best friend and I are in sync on almost everything.

改錯研析：

My best friend's views and mine are in sync.

My best friend's views are in sync with mine.

My best friend and I are in sync with each other.

(1) in sync on almost everything 應該是「各方面幾乎都很契合」的直譯，但英文並無 in sync on something 的用法，in sync 之後接的「介係詞」是 with。

(2) 如果是「想法很契合」，或「思想觀念一致」，就必須把「想法」（views）表示出來，否則不知道雙方是哪裡契合。

(3) 兩人各方面都很契合，可以表示為 in sync with each other。