ancient 指很久以前发生或存在的事物。用于描述历史时，指远古时代。
old 指长期以来一直存在着的事物，与times连用指古代，与days连用时指从前或旧社会。
antique 指已经很古老或颇有古风的事物，一般都具有较高价值。
参考例句
1. He spent his vacation antiquing in Beijing. 他利用他的假期在北京觅购古董。
2. Is this real antique or mimic? 这真的是古董，还是仿制品？
3. He can distinguish a genuine antique from reproduction. 他能区别真正的古董与复制品。
英英解释
n.
1. an elderly man
2. any piece of furniture or decorative object or the like produced in a former period and valuable bec v.
1. shop for antiques
2. give an antique appearance to adj.
1. made in or typical of earlier times and valued for its age
2. out of fashion
3. belonging to or lasting from times long ago
