早于7:30分是early than还是earlier than?

问题描述:

早于7:30分是early than还是earlier than?

before 7:30

earlier than 好

貌似我没见到过这么表达的,典型中式英语。
地道的说法,应该是before 7:30

earliyer than

earlier than
因为是比较级,和7:30分比较.