adj.预先写的
When former Matson executive Bill Harmon was in the Navy during World War II, he would write ahead to Esperanto speakers in ports where his ship was due to dock. 当前玛特森海运公司退休主任比尔哈蒙，曾经于二战期间在海军服役时，他会提前给即将停泊港口地的世界语使用者写信。
I think the work can be completed ahead of time. 我认为这项工作能提前完成。
The roads merge a kilometre ahead. 这两条道路在前面一公处汇合成一条大道。
The horse forged ahead the lead in the homestretch. 那匹马在最后阶段突然加速跑到前面。
Despite the bad weather the fete will go ahead. 尽管天气不好，游乐会照常举行。
The motel is dead ahead about a mile from here. 那家汽车旅馆就在前方大约一英里的地方。
