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[析] after 与 later都可以用来表达一段时间之后，但它们所处的位置不同，after 在时间词前，而later在时间词后。

[误] She hid herself after the tree.

[正] She hid herself behind the tree.

[析] after多用来表达某动作之后，所以有的语法书中称它为动态介词，如：I run after him. After finishing my homework, I went to see a film. 而behind则多用于静态事物之后。

[误] There is a beautiful bird on the tree.

[正] There is a beautiful bird in the tree.

[析] 树上长出的果实，树叶要用on, 而其他外来的人、物体均要用in the tree.

[误] Shanghai is on the east of China.

[正] Shanghai is in the east of China.

[析] 在表达地理位置时有3个介词：in, on, to。 in表示在某范围之内; on表示与某地区接壤;to则表示不相接。如：Japan is to the east of China.

[误] I arrived at New York on July 2nd.

[正] I arrived in New York on July 2nd.

[析] at用来表达较小的地方，而in用来表达较大的地方。at常用于at the school gate, at home, at a bus stop, at the station, at the cinema, at a small village。

[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。

[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.

[误] This weekend I'll stay in Uncle Wang's.

[正] This weekend I'll stay at Uncle Wang's.

[析] 要注意英文的特殊表达法，如：at a tailor's shop (裁缝店)=at a tailor's, 　at the doctor's (去看病) at the bookseller's (在书店) at uncle Wang's (在王叔叔家)

[误] Do you know there is some good news on today's newspaper?

[正] Do you know there is some good news in today's 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。

[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 Tom's 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。

[误] In my way to the station, I bought a newspaper to kill time.

[正] On my way to the station, I bought a newspaper to kill time.

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