時間的重要性之一，就是提醒我們「什麼時候該做什麼事」，英文句型可以這樣表達：It is (high/about) time that S + V-ed...
此句型帶有假設語氣，意思是「是時候該做某事」，用來強調某事或動作「早該」發生了。所以 that 子句中的動詞時態應使用過去式，表示行為「該做而尚未做」，且 that 可省略。
• It's time (that) we went over to Grandpa's house to play cards. We haven't seen him in ages!
我們是時候去爺爺家玩牌了，已經好久沒看到他！
• It's time that you went to bed. It's already past midnight!
你該上床睡覺了，都已經過了午夜！
• Oliver's flight is tonight, so it's about time that he finished packing.
奧力佛的班機就在今晚，所以他早該打包好行李了。
• The workers are on strike because they think it's high time that they were given a raise.
工人們在罷工，因為他們認為自己早該被加薪了。
！ time 之前可使用 high 或 about 加以修飾，表強調語氣「早該…；真的應 該要…」，其例句如下：
• It is high time (that) you washed your dirty car; it looks like it's a totally different color now.
你早該清洗你那髒兮兮的車子了，它現在看起來完全是別的顏色。
• It's about time (that) we took our dream trip around Japan.
我們真的應該進行環遊日本的夢想之旅了。
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