over主要用作副词、介词、名词、形容词和动词。over作为副词和介词的使用比较常见。现对over作为副词的几个常见的意思，举例说明。
1．over指“翻倒，落下，倒下”。比如：He pushed me and I fell over.他一推我，我就摔倒了。Try not to knock that vase over.小心别把花瓶碰倒了。The wind must have blown it over.准是风把它吹倒了。
2．over指“满出……，越过”。比如：The milk's boiling over!牛奶煮沸溢出来了! He rowed us over to the other side of the lake.他把我们摆渡到湖的对岸。They have gone over to France.他们渡海到法国去了。
3．over指“翻转过来”。比如：Turn the page over.把这一页翻过去。Dogs are rolling over and over on the grass.狗在草地上打滚。
4.over指“超过…（数量限度等）”。比如： The programme ran two minutes over.那个节目超出了规定时间两分钟。These are children of 14 and over.这些都是十四岁及十四岁以上的儿童。
5．over指“剩余，余下”。比如：Was there any money over?有剩下的钱吗?Three into seven goes twice and one over.七除以三得二余一。If there's any food left over, put it in the fridge.要是有剩下的饭菜，就放到冰箱里。
6.over指“覆盖在……的上面，盖住”。比如：The lake was frozen over.湖面完全封冻了。Cover her over with a blanket.给她盖条毯子。Let's paint it over in green.我们把它涂成绿色的吧!
7.over指“全部地，从头至尾地”。比如：You'd better read it over carefully.你最好仔细地阅读一下。
8.over指“再，重复地，再三地”。比如：I've told him over and over.我已经一再跟他讲过了。I made so many mistakes that I had to do it (all) over again.我弄出这么多错，必须从头再做一遍。My sums were wrong and I had to do them over.我把总数算错了，必须再算一次。