Over可以用作介词、副词和形容词。这里就其介词的用法举例说明。
1.over指“在……上方、上面”，但未触及。比如：They held a large umbrella over her. 他们给她撑起一把大伞。The balcony juts out over the street.阳台伸出在街道上方。
The lamp hung over above the table.那盏灯悬挂在桌子的上方。
2．over指“蒙在……上”，是部分或全部覆盖。比如：He put the newspaper over his face.他用报纸蒙在脸上。He wore an overcoat over his suit.他在西服外面加了一件大衣。She put her hand over her mouth to stop herself from screaming.她用手捂住嘴，以免叫出声来。
3．over指“从一边到……的另一边，穿越” ，尤指先向上然后再向下。比如：They ran over the grass.他们跑过草地。They had a wonderful view over the park.他们放眼望去，把公园美丽的景色尽收眼底。If we can't go over the mountain we must go round it. 如果我们翻越不了这座山，就得绕过它走。
4．over指“从……边缘上掉下”。比如：The car had toppled over the cliff.汽车从山崖上跌落下去了。He didn't dare look over the edge.他不敢从边缘向下看。
5．over指“在……那边”。比如：They live (just)over the street.他们(就)住在街那边。
6．over指“到处，遍及”。比如：Rain is falling all over the country.全国各地都在下雨。They've travelled all over the world.他们游遍了全世界。
7．over指“统治，控制；支配”。比如：He ruled over a large kingdom.他统治一个疆域广大的王国。I don't want anyone over me, telling me what to do.我不愿受任何人的摆布，告诉我该干这干那的。
8．over指“比……多，在……以上”。比如：She stayed in Beijing for over a month. 她在北京斯逗留了一个多月。He's over sixty.他六十多岁了。
9．over指“在……期间，经过（一段时间）”。比如：We'll discuss it over lunch.我们吃午饭时商量此事吧。We're away over the New Year.新年期间我们不在家。
10．over指“利用；通过”。比如：We heard it over the radio.我们从广播中听到的。She wouldn't tell me over the phone.她不肯在电话里告诉我。
11．over指“由于；关于”。比如：We always have an argument over money.我们总是 为了钱的争吵。They have a disagreement over the best way to proceed.他们在如何采用最好的方法上出现的分歧。
