介词短语几乎是每一句话的中心部分。简单地说，它们总是由介词和介词的宾语组成。因此，熟悉句子的这一重要部分以及它如何影响你的写作风格是很好的。

这是约翰·斯坦贝克1939年出版的著名小说《愤怒的葡萄》第29章的第一段。当你阅读这一段时，看看你是否能辨认出斯坦贝克用以表达经历了漫长而痛苦的干旱后，雨戏剧性地卷土重来的所有介词短语。完成后，将结果与段落的第二个版本进行比较，其中以斜体突出显示介词短语。

斯坦贝克在《愤怒的葡萄》中的原始段落

Over the high coast mountains and over the valleys the gray clouds marched in from the ocean. The wind blew fiercely and silently, high in the air, and it swished in the brush, and it roared in the forests. The clouds came in brokenly, in puffs, in folds, in gray crags; and they piled in together and settled low over the west. And then the wind stopped and left the clouds deep and solid. The rain began with gusty showers, pauses and downpours; and then gradually it settled to a single tempo, small drops and a steady beat, rain that was gray to see through, rain that cut midday light to evening. And at first the dry earth sucked the moisture down and blackened. For two days the earth drank the rain, until the earth was full. Then puddles formed, and in the low places little lakes formed in the fields. The muddy lakes rose higher, and the steady rain whipped the shining water. At last the mountains were full, and the hillsides spilled into the streams, built them to freshets, and sent them roaring down the canyons into the valleys. The rain beat on steadily. And the streams and the little rivers edged up to the bank sides and worked at willows and tree roots, bent the willows deep in the current, cut out the roots of cotton-woods and brought down the trees. The muddy water whirled along the bank sides and crept up the banks until at last it spilled over, into the fields, into the orchards, into the cotton patches where the black stems stood. Level fields became lakes, broad and gray, and the rain whipped up the surfaces. Then the water poured over the highways, and cars moved slowly, cutting the water ahead, and leaving a boiling muddy wake behind. The earth whispered under the beat of the rain, and the streams thundered under the churning freshets.

完成原始段落中的识别练习后，将结果与此标记版本进行比较。

斯坦贝克用粗体介词短语写的段落

Over the high coast mountains and over the valleys the gray clouds marched in from the ocean. The wind blew fiercely and silently, high in the air, and it swished in the brush, and it roared in the forests. The clouds came in brokenly, ​in puffs, in folds, in gray crags; and they piled in together and settled low over the west. And then the wind stopped and left the clouds deep and solid. The rain began with gusty showers, pauses and downpours; and then gradually it settled t​o a single tempo, small drops and a steady beat, rain that was gray to see through, rain that cut midday light to evening. And at first the dry earth sucked the moisture down and blackened. For two days the earth drank the rain, until the earthwas full. Then puddles formed, and in the low places little lakes formed in the fields. The muddy lakes rose higher, and the steady rain whipped the shining water. At last the mountains were full, and the hillsides spilled into the streams, built them to freshlets, and sent them roaring down the canyons into the valleys. The rain beat on steadily. And the streams and the little rivers edged up to the bank sides and worked at willows and tree roots, bent the willows deep in the current, cut out the roots of cotton-woods and brought down the trees. The muddy water whirled along the bank sides and crept ​up the banks until at last it spilled over, ​into the fields, into the orchards, into the cotton patches where the black stems stood. Level fields became lakes, broad and gray, and the rain whipped up the surfaces. Then the water poured over the highways, and cars moved slowly, cutting the water ahead, and leaving a boiling muddy wake behind. The earth whispered under the beat of the rain, and the streams thundered under the churning freshlets.

常见介词

关于	在…的后面	除了	外部
在上面	在下面	对于	结束
穿过	在下方	从…起	过去的
之后	在旁边	在里面	通过
反对	之间	在…内	到
沿着	超过	进入	在下面
在…之间	通过	近的	直到
围绕	即使	属于	向上的
在	向下	关	具有
之前	在期间	在…上	没有