ahead of 和advance 区分

advance
vt.
1. 使向前移动;推进,促进
The president has done his utmost to advance the national interest.
总统已尽了最大努力来增进国家的利益.
2. 将...提前
The date of the meeting was advanced by four days.
会议提前四天召开.
ahead
ad.
1. 在前;向前
The hills ahead are not wooded.
前面的山上没有生长树木.
2. 预先,事前
You'd better plan ahead.
你最好事先计划一下.
[advance,一般用语事物向前进也指人]