on Saturday Night的用法和樣例：
例句
- Mr. Hill, do you have an engagement on Saturday night?
希爾先生，你周六晚上有空嗎？ - John said that his daughters could have a party on Saturday night, but warned them that he would be keeping an eagle eye on the proceedings.
約翰說，他的女兒們可以在星期六晚上舉行一個晚會，但警告他們說。他會密切注意他們的各種活動。 - Once in a while he goes with us to the movies on Saturday night.
偶爾在星期六晚上他同我們一道去看電影。
