从句到段：段落的展开
　　基本句法掌握之后，接下来就要训练段落写作，这是因为段落是文章的基本组成部分，要写出好文章，必须在段落写作上多下功夫。 
段的基本组成是句子，好的段落应该是该段中所有的句子都围绕着一个主题展开，且句与句之间应该是紧密相连，形成统一的整体即unified and coherent。那么怎样将一个段落展开呢？下面介绍英语中几种常用的方法。
　　(1)时间顺序 按时间顺序写作就是按照事物发展在时间上的正常顺序或先后顺序展开段落。在讲述故事或回忆事件时，先发生的先写，后发生的后写。请看下面的例子：
　　my heart gave a leap when i heard the announcement that our train would soon arrive at its destination—beijing. like other passengers, i began to collect my things and put my mug, towel, atlas, apples, and other things into my bag. to the tune of a beautiful song the train pulled into the station and gently stopped by a platform. i walked out of the train and was carried forward by the stream of people into an underground passage and then into a big hall. as i stepped out of the station, i was dazzled by the bright autumn skies of beijing. though i had been on the train for more the thirty hours and spent an sleepless night, i didn’t feel tired at all, and i believed my days in this glorious city would be as sunny as the skies.
　　(2)空间顺序 按空间顺序组织材料通常用于描述一个地方、事情或人物外貌等。其文章内容应按照由近及远、由远及近、自下而上、自上而下、按顺时针方向或逆时针方向排列，例如：
　　in the middle of the rectangular-shaped courtyard stood three magnolia trees(), all in full bloom. a little girl was hoping among them, now gazing at a bud, now collecting fallen petals. under one of the trees stood her parents, who, while keeping an eye on her, were examining the snow white blossoms with great interest and admiration. in front of another tree a young couple, fresh and bright as the flowers, were posing for a picture. at the end of the courtyard a group of youngsters had gathered behind an artist painting a flourishing limb, which looked so charming and real that a boy stooped to sniff at a half-open flower. at the opposite end a few elderly men and women stood admiring the leafless flowering trees and the people looking at them.

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