如果时光能倒流，英文可以用 "If time could turn back" 来表达。

这个表达来源于时光倒流的概念，即人们常常希望能够回到过去，改变某些事情的过程。

下面是一些用 "If time could turn back" 表达的英文例句及其中文翻译：

If time could turn back, I would have studied harder in high school. (如果时光能倒流，我会更加努力地学习高中时期的课程。)

If time could turn back, I would have told my loved ones how much I appreciate them. (如果时光能倒流，我会告诉我爱的人们我有多感激他们。)

If time could turn back, I would have made different choices in my career. (如果时光能倒流，我会在职业生涯中做出不同的选择。)

希望这些例句能帮到你！