4．在某些名词前用冠词或不用冠词，其意义有所不同。如：
go to church(去做礼拜)     go to the church(到那座教堂去)
in class(在上课时)            in the class(在班级中)
in charge of(负责)           in the charge of(由……负责)
in hospital(生病住院)       in the hospital(在医院里工作或参观)
at table(在吃饭)             at the table(在桌子旁)
take place(发生)             take the place(代替)
in front of(在……的前面)    in the front of(在……前部)
keep house(管理家务)      keep the house(呆在家里)