抽象化的个体名词(如bed,church,class,college,school,university,work,hospital,court,prison,market,sea,town等)前一般不加冠词
一般不加
live in town
go to town
out of town
但加了也可
live in a town
live in the town
关键是看所表达的意思
in town是指城里（与乡下比in the country） 抽象化的
in a town是指在一个镇里（与city.village.county 比）