"Before seven o'clock" 在英语中可以说作 "before 7 AM/PM" 或 "prior to 7 AM/PM"。这种表达方式源于英语中对时间的表达方式，即在上午或下午之前。
例句：
I need to finish this project before 7 PM tonight. (我需要在今晚7点之前完成这个项目。)
We should leave for the airport prior to 7 AM in order to avoid traffic. (我们应该在早上7点之前离开去机场，以避免交通堵塞。)
The store closes at 9 PM, but they start cleaning up before 7 PM. (商店在晚上9点关门，但他们会在晚上7点之前开始打扫。)