ahead of和 in advance的区别和用法

in advance 和ahead区别 ahead of和 in advance的区别和用法 in advance 和ahead of schedule的区别 英语 in advance 和ahead of time .ahead of schedule.区别.请问他们之间的区别.举几个例子. ahead of time 与 time in advance有什么区别? in advance=?ahead of=?hold on=?go on=? in advance 与ahead of time 之间的区别.请附例句. ahead of date 和 date in advance区分如何区分呢,提前时间,两个都可以用还是有区别呢, 英语高手进,帮忙区分两个词的用法.employ和hire以及in advance和in ahead 的区别, in advance of 何意 ahead of&in front of 的区别和用法 ahead of,in spite of He drove fast and arrived an hour____ of schedule. A.in advance B.ahead C.abreast D.in front 请解释 ahead、before和in front of 具体区别要具体 ahead of 和advance 区分都有提前的意思,怎么区分呢?如：提前通知,提前时间用哪个呢 翻译：In advance of an official announcement ■学英语学到cells增加Columbus was_____________his times in his belief that the Earth was round.A.in front of B.in advance ofC.beforeD.ahead of请问选什么,其他错误的理由是? ahead of 和in front of的区别有人和我讲 in front of 是相对静止的概念ahead of 是动态的行为