另外一個英文單字 official（聽發音）也有官方的或正式的意思，舉例來說，正式的信件或官方信函英文可以說 official letter、正式的聲明或官方聲明英文是 official statement。
正式的英文造句練習
After ten years of hard work, Jimmy finally became an official teacher.經過十年努力，吉米終於成為正式的老師。
Tom formal introduced his girlfriend to friends and relatives.
湯姆將女友正式的介紹給親友認識。
Formal occasions, we must wear formal clothing.
正式的場合，我們就要穿正式的服裝。
It was very impolite to wear slippers at the formal reception.
正式的招待會上穿拖鞋是很不禮貌的行為。
The long-awaited film was finally officially released today.
期待已久的電影終於在今天正式的上映。
Do you know how to write an official invitation card?
你知道正式的邀請卡怎麼寫嗎？
This is a formal interview, will affect your opportunity to go abroad.
這是一次正式的面談，將會影響你出國的機會。
After the first two test jumps, she broke her record in the official high jump.
選手經過前兩次的試跳，她在正式的跳高中破了自己的紀錄。