46.〔误〕He lived in No. 3 Beijing Road. 〔正〕He lived at No. 3 Beijing Road.
〔析〕在门牌号码前要用at, 并要注意它的惯用法：at the end of the street, at the foot of the mountain, at the top of the page。
47.〔误〕There is a colour TV set at the corner of the hall. 〔正〕There is a colour TV set in the corner of the hall.
〔析〕在屋内的角落应用in，而墙的外角用at，如：There is a tree at the corner of the street.
48. 〔误〕Do you know there is some good news on todays newspaper? 〔正〕Do you know there is some good news in todays newspaper? 〔析〕在报纸上的新闻要用in, 而在具体某一版上，或某一页上则要用on。
49. 〔误〕The school will begin on September 1st. 〔正〕School will begin on September 1st.
〔析〕这里的school应看作不可数名词泛指学校的课程，即开学之意。要注意，有些活动场所当表达正在从事该种活动时不要加冠词，如：at table (吃饭)， When I came to Toms home, they were at table. 还有： at desk (学习)，at work (工作) at school (上学)， in hospital (住医院) at church 作礼拜如加上定冠词则另有他意，如：at the school 即在学校工作或办事，in the hospital 即在医院工作或去看望病人。
50. 〔误〕Ill leave Beijing to Shanghai tomorrow. 〔正〕Ill leave Beijing for Shanghai. 〔正〕Ill leave for Shanghai.
〔析〕leave for 是离开某地去某处的固定搭配，不可将for改为别的介词。这样的搭配还有：start for 动身前往某处，set out for， sail for。