(1)在(向)前(in or into the front position)：the road/way/hill～前面的路/道路/山;run/move～在(向)前跑/移动;forge/stare～向前迈进/凝视前方;Full speed～! 全速前进!You go on～in that car.你坐那辆车头里走。That horse is several metres～.那匹马跑在前面几米远的地方。

(2)在……之先，提前(in or into the future time)：There are severe/grim days～.艰难/严酷的日子在后头。A～there's work to be done.还有工作要作。plan/think～提前计划/考虑;look～往前看;put one's departure～提前出发;phone～to get tickets 提前打电话订票;

(3)优于(in or into a situation more advantageous than the previous or present one)：be sure to get～in business商业上一定会成功;Another goal put our team～.又进了一个球就使我们队领先了。

(4)进行(展)(on with one's activities or intentions)：go～with a plan/one's work 按计划继续进行/继续进行工作;“Go～，” she said.她说：“讲下去。” go～in one's business 生意有进展;

← head n;

ahead of 1)(位置或时间)在……之前(先)：～of sb in the queue 排队站在某人之前;～of time/schedule 提前/(比原计划)提前;Australia is several hours～of Britain.澳大利亚比英国早几个小时。Australian time is several hours～of British time.澳大利亚时间比英国时间早几个小时。He is two years～of his friends.他比朋友们早两年。2)优于：be (get) well～of all competitors/one's rivals/the rest of the class大大胜过所有的竞争对手/竞争对手/班上其他学生