department 作商店解时，是美国英语，通常写为department store。
store 在美国指出售同一类商品的小型商店。在英国用复数形式表示百货商店。
shop 指规模较小，出售同一类商品的店铺。
参考例句
1. to shop Shopping Guide in the newspaper 在报纸上查阅《购物指南》栏
2. Good morning! Welcome to our shop. 早上好欢迎您来我们店。
3. We went to the shop today. 今天我们去了那家商店。
英英解释
n.
1. a mercantile establishment for the retail sale of goods or services
2. small workplace where handcrafts or manufacturing are done
3. a course of instruction in a trade (as carpentry or electricity) v.
1. do one's shopping
2. do one's shopping at; do business with; be a customer or client of
3. shop around; not necessarily buying
4. give away information about somebody
