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　　　1.(误〕 Three days after he died. 正〕 After three days he died. 〔正〕 Three days later he died.

　　　　〔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。

　　　　2.〔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。

　　　　3.〔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.

　　　　4.〔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.

　　　　5.〔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。