英语小问题请问knock off 和knock over 的区别,我老是搞不清

英语小问题
请问knock off 和knock over 的区别,我老是搞不清

knock off
1. 打掉,碰掉,敲掉；撞倒；击倒：例句: She accidentally knocked the glass off.她不小心把玻璃杯碰掉了.
I knocked him off his feet.我把他打倒在地.
2. [口语]停止工作,休息,下班：例句: All the workers knocked off for lunch at twelve o'clock.所有的工人都在12点钟停止工作去吃午饭.
What time do you knock off?你们什么时候下班?
3. 减掉,降低(价格)；减低(速度)：例句: The shopkeeper agreed to knock 5 pounds off the price.店主同意把价格降低5镑.
4. 匆促完成；匆忙写出(文章等),即席做成：例句: I've a few letters to knock off this morning.今天上午我有几封信要赶出来.
He knocks off a poem.他即席赋诗.
5. 排除,除掉；击败；破坏；消灭：例句: The headmaster is trying to knock off every objection.校长正努力排除一切反对意见.
to knock off opponents击败对手
6. 赢得,获得：例句: He knocked off a Nobel prize.他获得了一项诺贝尔奖.
7. [俚语]杀死,谋杀,干掉：例句: He was knocked off by the gangsters.他被歹徒谋杀了.
8. [俚语]偷(某物)；抢劫(某处)：例句: Who knocked off my purse ?谁偷了我的钱包呢?
The man who knocked off a bank last night was arrested.昨天夜里抢劫银行的人被逮住了.
9. [俚语]拘捕,捉住；突然抄查：例句: He was knocked off by the police.他被警察拘捕了.
The company was knocked off yesterday.该公司昨天被突然抄查了.
10. [俚语]很快吃光(或喝光)：例句: They have knocked off the whole cake in a few minutes!他们在几分钟内便吃光了那块大蛋糕.
11. 【板球】得(分)：例句: Our team knocked off another two points.我们队又得了两分.
12. [俚语]与(女人)发生性关系；诱奸
13. 翻印(时装样本等),复制(时装图样)
14. 采取仿制的手段以低于原作的价格出售；以翻印本使售价比…低
以上来源于: 《21世纪大英汉词典》
knock over
1. 撞倒,击倒；打翻,弄翻：例句: to knock somebody over撞倒某人
The cat knocked over the vase on the table.猫将桌上的花瓶弄翻了.
2. 压倒,轻易地打败：例句: She was knocked over by fever.她由于发烧而病倒了.
We soon knocked over our competitor.我们很快打败了我们的竞争对手.
3. 克服(困难),摆脱：例句: We tried our best to knock over difficulties.我们尽最大努力克服困难.
4. 使震惊,使心烦意乱：例句: The news fairly knocked me over.这消息真使我吃惊.
5. 完成：例句: I knocked over a book a day.我一天读完一本书.
6. [俚语]偷,抢,抢劫：例句: I wondered where he got all those jewels. He must have knocked them over.我猜测着他在哪儿弄到的那么多珠宝.他一定是偷来的.
The bank around the corner was knocked over last night.昨天夜里位于拐角的那家银行被抢了.
7. 挣得(收入)：例句: My husband knocked over a good sum last year.去年我丈夫得到了一笔可观的收入.
8. 使深受感染；使激动得鼓掌(或喝彩)：例句: The audience was knocked over by her perfect performance.观众为她的完美演技深深感动了.
9. [俚语]突然抄查；搜查,逮捕：例句: The police knocked the gambling joint over yesterday.昨天警察抄查了赌窟.
10. [美国俚语](尤指一下子)吃掉；喝下：例句: to knock over a drink喝杯酒
以上来源于: 《21世纪大英汉词典》