1. S 后部，反面　 part or surface of an object that is furthest from the front; part that is less used, less visible or less important
2. C 背，背部　 rear part of the human body from the neck to the buttocks
3. C 椅背　 part of a chair against which a seated person's back rests; part of a garment covering the back

　break one's ～　拼命干，尽最大努力
　break the ～ of sth　完成某事最艰难的部分
　get sb's ～ up　触怒某人
　get off sb's ～　不再找某人的麻烦
　give sb one's ～　不理睬某人
　have one's ～ to the wall　陷入绝境
　lean one's ～ against the wall　以背靠墙
　put one's ～ into sth　孜孜不倦地做某事
　see the ～ of　赶走，撵走
　sit in the ～　坐在后面
　turn one's ～ on　对…掉头不顾，轻视
　at sb's ～　幕后支持
　at the ～　在后部
　at the ～ of one's mind　在脑中酝酿
　behind sb's ～　瞒着某人
　from the ～　从后面
　in the ～ (of)　在(…的）后部
　in the ～ of the book　书后的附录中
　in the ～ of one's mind　下意识地，潜意识地
　lie on one's ～　仰卧
　on one's ～　仰天而卧，用背驮
　on the ～ of a magazine　杂志的封底上
　～ to ～　背靠背
　stand ～ to ～　背对背站着

　There used to be a big and beautiful garden at the back of their house.　以前在他们房子的后方是一个大花园。
　There is a lot of useful information at the back of this dictionary.　这本词典的后面附有很多有用的信息。
　The last time I bought from a market trader I was given rotten fruit from the back of the pile.　上次我在集市上买东西，小贩卖给我的是从水果堆后面拣出的烂水果。
　I've got a sore place in my back.　我背上有个地方痛。
　He likes sitting in the back of the class.　他一直喜欢坐在教室的后排。
　Some fishes have gills on the back.　一些鱼背上有刺。
　There is a bird on the back of a piece of cloth.　一块布的反面有一只鸟。
　You write the address on the front of an envelope, not on the back of it.　你把地址写在信封正面，而不是反面。
　I am afraid my report for the past year is not a very cheerful one, it is the story of one calamity on the back of another.　恐怕我关于去年的报告不令人愉快，那是一个接一个的灾难故事。
　The little boy was dozing with his back against the chair.　那个小男孩正靠在椅子上打盹。
　Did you paint the back of the bookcase?　你漆过书橱的背面吗?
　My home lies back of the school.　我家就在学校后面。
　One of the backs was hurt in the match.　其中一名后卫受了伤。

 ♣ at the back of
1. 作为…背后的原因 ultimately responsible
　After a long time the police discovered the man at the back of the famous robbery.　经过很长的时间，警察发现此人就是那桩有名的抢劫案的背后主使者。
　You are at the back of all our difficulties.　我们的一切困难都是你造成的。
　Could you feel anything at the back of it?　你感到这里有点名堂吗?
2. 支持 support
　The people are at the back of the reformers.　人民支持改革家。
 ♣ at the back of mind
　在内心中　in one's thoughts, but without being of immediate or central concern
　The issue has been lingering at the back of my mind for a long time.　长期以来这个问题一直在我的脑海里萦绕。
　The idea of writing a book slowly grew at the back of his mind.　写书的想法在他的思想深处慢慢地成熟起来。
　I have an idea at the back of my mind that I met him at a conference about two years ago.　我模糊记得大约两年前在一次会议上见过他。
　I think I shall sell this house and buy a smaller one, I have had it at the back of my mind for some time.　我想要把这房子卖掉，买一栋小一点的，我有这想法已有一段时间了，但不肯定。
 ♣ back be to the wall
　处于绝境　in difficulties with no retreat
　They made more than ten objections but William overcame them all; he always fights best when his back's to the wall.　他们提出了十多条反对的理由，但是威廉把它们全都驳倒了，他处于绝境时最能争斗。
　Their backs are to the wall. If they don't find another creditor, they will go bankrupt.　他们的处境困难，如果找不到另一个贷款的人，他们就要破产。
 ♣ back to back
　背靠背　back against back
　She arranged the chairs in two rows, placed back to back.　她把椅子背靠背地摆成两排。
 ♣ back to front
　前后颠倒　with the back placed where the front should be
　Your pullover is on back to front.　你的套头毛衣前后穿反了。
　The windows had rude words written in the grime outside, which Mrs. Rober could read back to front as she sat and rocked the baby.　窗子外面有用灰写的下流话，罗珀太太坐着摇婴孩可以从反面看到。
 ♣ back to the drawing-board
　一切从头再来　restarting from the beginning
　The furniture won't all fit in that way so I am afraid it's back to the drawing-board.　那样摆设的话，这套家具就不能全放进去，因此我想只好从头再来。
　They didn't like our first suggestion much, so we said, "Ah, well, back to the drawing-board."　他们不大喜欢我们最初的一些建议。因此，我们说：“啊，好啦。一切从头来吧！”
 ♣ be on one's back
1. 依靠某人 depend on sb
　Tamkin would get through his crisis, too, and bring him, Wilhelm, to safety also. And Wilhelm realized that he was on Tamkin's back.　塔姆金也会设法渡过这场危机，同时也会把他，威海姆，带到安全之地。威海姆也意识到他须依赖塔姆金。
2. 取笑〔烦扰〕某人 annoy, hinder or persecute sb
　She was always on his back, nagging him from morning to night to move to a quieter district.　她总是烦扰他，从早到晚唠叨不停地要他搬到安静一点的地区去。
 ♣ behind one's back
　背着某人　without sb's knowledge or consent
　We should not speak ill of a man behind his back.　我们不该在背后讲别人的坏话。
　I think we should wait till he arrives; I don't like criticizing people behind their backs.　我认为我们应该等他来，我不爱背后批评人。
 ♣ break the back of
　解决了最艰难的部分　finish the more or most difficult part of sth
　I should break the back of this piece of the work by this weekend.　到这个周末我应该完成这件工作中最艰巨的部分。
　I finally broke the back of the problem.　我终于解决了这个问题最艰难的部分。
 ♣ get on sb's back
　找某人的麻烦　persecute sb
　Even since she came to stay, your mother has been getting on my back, telling me how to do things and making unkind remarks.　自从你母亲到这儿来住，她就一直找我的麻烦，告诉我该怎样做事，说一些刺耳的话。
 ♣ like the back of a bus
　难看的，丑陋的　ugly
　She has a nice figure but she's got a face like the back of a bus.　她的身材很好，但是她的脸很难看。
 ♣ like the back of one's hand
　熟悉　intimately
　She knows the layout of the back streets like the back of her hand.　她对那些偏僻的街道了如指掌。
 ♣ pat on the back
　对…表示赞扬　praise
　It can be very embarrassing to have to listen to someone patting you on the back in public.　不得已而需要在大庭广众之下听人赞扬自己会使你很窘。
　Her performance wasn't so wonderful—I don't know what cause she has to pat herself on the back.　她的表演并不怎么精彩——我不知道她有什么理由自鸣得意。
　The first minutes of his speech consisted mainly of patting himself on the back.　他发言的前几分钟主要是自吹自擂。
 ♣ put one's back into
　竭尽全力　make a strenuous effort
　They put their backs into the work and finished it in half an hour.　他们全力以赴地干，半小时就完成了这项工作。
　If you really put your back into it, you should be able to finish repairing the roof by tonight.　如果你真正全力以赴地干，到今天晚上，你就能把屋顶修好。
 ♣ stay on sb's back
　纠缠　be in a tangle
　These sergeants stay on my back how I stand in the line, how I hold my gun, how I salute, how I walk, everything. I can't do anything right.　这几位中士纠缠我，指导我该怎样站队列，怎样持枪，怎样敬礼，怎样走，样样都不放过我。我一样都做得不对。
 ♣ turn one's back on
1. 不理睬 not pay attention to
　She turned her back on him.　她不理睬他。
　I appealed to my father for help, but he turned his back on me.　我向父亲求援，可是他不肯帮忙。
　The unions have turned their backs on the employer's latest offer of talks and the argument over pay continues.　工会对雇主最新提出的建议置之不理，关于工资的争议还在继续。
2. 背弃 abandon; deliberately ignore
　He has turned his back on his past way of life.　他脱离了过去的生活方式。
　He turned his back on his family when he became famous.　他成名以后就背弃了家庭。
 ♣ you scratch my back and I will scratch yours
　为了与己方便而给某人以方便；投之以桃，报之以李　you do me a favour and I will do you one in return
　If you give me a hand clearing the rubbish from my garden I will help you to paint your house—you scratch my back and I will scratch yours.　如果你帮助我把这些垃圾从我的花园清除出去，我会帮你粉刷房子——投桃报李嘛！

 ♣ at the back of, in the back of
　这两个短语的意思相近，都是“在…后面”的意思。其区别在于：
1. at the back of指在某地方之外的后面部分；in the back of的意思是指在某地方之内的后面部分。
2. at the back of也可引申为“支持”“在…印象中”，而in the back of没有此义。
 ♣ turn one's back on, turn one's back to
　两者不同义，前者含有轻蔑的感情色彩，而后者没有这种色彩。例如：
　In the old society, the rich always turned their back on the poor.　在旧社会，富人总是瞧不起穷人。
　But Jack has turned his back to the trouble over it.　可杰克并不把这件麻烦事放在心里。
 ♣ 下面两句意思不同：

 ♣ 下面两句意思不同：

　前者用于直义，后者则含有“巴不得离去”的意味。

1. 他仰卧着并凝视着天花板。
　［误］ He lay to his back and stared up at the ceiling.
　［正］ He lay on his back and stared up at the ceiling.
　［析］ 表示“仰卧”，应该说lie on one's back，介词用on不用to.
2. 他租了一间后房。
　［误］ He rented a room in back of the house.
　［正］ He rented a room in the back of the house.
　［析］ in back of表示“在…后面”，相当于behind. in the back of表示“在…后部”，相当于in the rear part of. “一间后房”应该是a room in the back of the house.
3. 房子后面有一块菜园。
　［误］ There is a vegetable garden in the back of the house.
　［正］ At the back of the house there is a vegetable garden.
　［析］ 表示“在…之外的后面部分”，应该说at the back of，不用in the back of.

1. vt. & vi.（使）后退，（使）倒退　 (cause to) go backward
2. vt.支持　 support

　～ agilely　机敏地支持
　～ consistently　一贯支持
　～ contemptuously　傲慢地支持
　～ deliberately　故意支持
　～ discreetly　谨慎地支持
　～ strongly　坚决支持
　～ down　退出
　～ off　后退，放弃
　～ out　不遵守
　～ up　支持，堵塞，后退
　～ against　面对，反对
　～ by sb's influence　在某人权势的支持下
　～ away from　从…避开
　～ into the garage　倒进车库
　～ onto　背朝着
　～ through the gate　倒出大门
　～ dress with silk　用绸布做衣服衬里

　The horse backed suddenly.　马突然向后倒退。
　Don't back off.　别打退堂鼓。
　I hope you will back my thought.　我希望你能支持我的想法。
　Can you back your story with facts?　你能举出事实来证明你的话吗?
　You could back the dress with silk.　你可以给这件衣服加丝绸衬里。
　All our books have now been backed.　现在我们的书全部都包上了书皮。

 ♣ back away　(v.+adv.)
1. 为了让出地方而后退，由于害怕而后退 move to allow space, in fear, etc.
　The crowd backed away to let the wounded man pass through.　人群向后退，让受伤的人通过。
　The child backed away from the fierce dog.　那孩子害怕那只恶狗，直往后退。
2. 不愿考虑 be unwilling to consider an idea
　I could see she was backing away from the idea.　我看得出来她不愿考虑这一意见。
 ♣ back down 　(v.+adv.)
　退让，退回去，撤销（要求等）　accept defeat in an argument, opinion, or claim; admit that one was wrong
　I saw that she was right, so I had to back down.　我看到她是正确的，所以我只好放弃原来的主张。
 ♣ back into　(v.+prep.)
　（使）倒进…　(cause to) move back into sth
　Be careful when you back into the garage, the doorway is very narrow.　你把车倒入车库时要小心，门道很窄。
　Next you must learn how to back a car into a parking space.　下一步你应该学会如何把车倒入停车的空地。
 ♣ back onto　(v.+prep.)
　后面是，背靠着　be near to or have at the back
　〔说明〕 back onto常不用于进行体。
　Our house backs onto a piece of woodland.　我们的房屋后面是一块林地。
　We chose this house because the garden backs onto the tennis courts.　我们选择这一住宅是因为它的花园背靠着网球场。
 ♣ back out　(v.+adv.)
　不遵守（诺言、合同等），改变主意　fail to fulfil a promise, contract, etc.; change an idea
　I hope I can depend on you not to back out at the last moment.　我希望能信赖你不至于在最后关头撒手不干。
　Please don't try to back out now that everything's been arranged.　既然一切都已安排妥当，请不要试图改变主意。
　You said you would go; you can't back out now.　你答应要去，你不能食言啊！
　He would like to back out of the contract, but we can't allow it.　他想取消这个合同，但是我们不能答应。
 ♣ back up　(v.+adv.)
1. 支持 support especially in an argument

　The policeman wouldn't have believed me if you hadn't backed me up.　如果当时没有你的支持，警察是不会相信我的。
　He backed up his arguments with facts.　他以事实支持自己的论点。
2. 堵塞 fill with people, cars, etc.， so that movement is difficult or impossible
　The flood water from the storm backed up the pipes.　暴雨引起的洪水堵塞了管道。
3. 往后退 go backward
　You'll have to back up and turn around.　你将不得不往后退并转身。
4. 复制 make a copy of
　Make sure you back up the disk before you turn the computer off.　在你关机之前要确定磁盘已存档。

 ♣ back away, back off
　这两个短语的共同意思是“后退”，一般说可以互换，特别是指“因害怕而后退”。而在表示“后退（让出地方）”时，含义略有差异， back away强调目的，即“为让出地方而后退”，而back off则强调结果，即“因后退而让出了地方”。
 ♣ back down, back off
　这两个短语的共同意思是“放弃论点、观点或权利”，其差别在于back off主要用于美式英语。
 ♣ back out, go back on
　这两个短语都有“言而无信”之意。其区别在于：
1. back out指主体违背或撤销其过去一度许下的诺言，或从所承担的义务、所参与的计划中撤出来；而go back on仅指“食言”，即说话不算数。
2. back out后可接of或from短语说明失信的具体内容；go back on后可接to短语或动词不定式说明具体的对象。
3. go back on直接接sb时往往含“不忠”或“出卖”的意思，而back out无此意义及用法。
 ♣ back, champion, support
　这组词的共同意思是“支持”。它们的区别在于：back多指给予物质或道义上的资助，有“作后台”的意味；support指支撑重量或作为支柱或给予需要的力量，以防某人或某物跌倒或陷下；而champion则指支持他人或某项运动而去奋斗、辩论或演说。例如：
　Don't worry. I will back you up.　不要忧虑，我支持你。
　The teammates supported the injured player.　队友扶着那受伤的球员。
　We champion a just cause.　我们支持正义的事业。

1. A 后边的　 situated behind
2. A 过去的，过期的　 of or for a past time
3. A 迟交的，欠交的　 owed for a time in the past; overdue
4. A 后元音的　 (of a vowel) formed at the back of the mouth

　～ door　后门
　～ seats　后座
　～ vowels　后元音
　～ yard　后院

　On the back wall there is a map of China.　后墙上有一幅中国地图。
　He came through the back door.　他从后门进来。
　Does the back door have a lock on it?　后门上锁没有?
　He sat in a back seat in the car.　他坐在车的后座上。
　There is something wrong with the back wheels of the truck.　卡车的后轮出了故障。
　He clawed his way up from the back streets of Glasgow.　他是从格拉斯哥的穷街陋巷里爬上来的。
　The war is all back history now, and our two countries are good friends.　这场战争已成为过去的历史，我们两国现在是友邦了。
　He owed three months' back rent.　他欠了3个月的租金。

 ♣ take a back seat
　居于次要的地位；知趣靠边　adopt an inconspicuous position or role
　At these discussions he always takes a back seat and listens to the others talking.　在这些讨论中，他总是退在后面，倾听别人谈话。
　It's about time you took a back seat and let your son run the business.　你该退居二线了，让你儿子来经营吧。
　After forty years in the business it's time for me to take a back seat and make room for younger men and new ideas.　我在这一行干了40年，现在该退居二线，让位给青年人和新思想了。
 ♣ through the back door
　走后门，通过不正当的秘密途径　in an unofficial way; indirectly
　They were so involved with the main issues that I was able to slip through the back door.　他们都深深地卷入了对重要问题的讨论，这样才使得我通过后门得以摆脱。

1. 往后，在后面　 towards or at the rear; away from the front or centre
2. 控制住，忍住　 under control
3. 恢复；上溯　 in an earlier position, condition or stage; into the past
4. 回报　 in return

　answer ～　反驳，回嘴，顶嘴；还击
　bite ～　很快忍住说出（秘密或冒犯他人的话）
　blink ～ one's tears　用眨眼来抑制泪水
　bounce ～　（失意后）恢复，回升
　bring ～　带回；归还；使回忆起；恢复
　bring ～ to health　使恢复健康
　bring ～ to life　使恢复生命
　call ～　回电话；叫回
　carry...～ (to)　使回想起
　choke ～　忍住，抑制
　claim ～ (from)　要求收回，索回
　come ～　回来；又流行起来；恢复记忆；想起来；（指制度、法律）恢复
　cut ～　修剪；缩减
　date ～ to　追溯到
　double ～　（为躲避追捕）原路返回；折叠起来，对折
　draw ～ (from)　引开，拉开，缩回；撤回，取消；（比赛中）超越
　drive ～　迫使…后退；驾车返回
　drop ～　落后；后撤
　fall ～　后退，退却
　fall ～ on〔upon〕　求助于，依赖
　feed ～ (to)　反馈回…
　fold ～　折叠，折起
　get ～　回来，回到；失而复得；取回，恢复原位；对…报复
　get ～ into circulation　重新恢复正常生活
　get ～ into harness　病愈后重新工作
　get ～ to　返回
　give ～　归还；恢复（视力、自由等）;反射出，照出
　go ～ on (one's word)　背弃；食言
　go ～ to　返回，归还，退回；重做某事，重操旧业；（冬令制）把钟表调回；追溯，时光返回到
　hand ～ (to)　交还；物归原主
　hang ～　犹豫；退缩
　have ～　收回（被借走、偷走等之）某物；允许（分手的配偶等）返回
　hold ～　阻止前进；控制；抑制；（由于谨慎、害怕而）犹豫，踌躇；保留，扣住（不发表），保密
　keep ～ (from)　保持一定距离，克制住，挡住；隐瞒住，不让知道；扣留；留住；不付
　lie ～　往后靠坐；放松
　look ～ (on)　回顾
　pay ～　归还；还清；报复
　play ～　放，放送（唱片、磁带等）
　pull ～　撤退，撤回
　push ～　逼迫；使撤退；把…推回原处
　put...～　把…放回原处；倒拨时钟；使（日期）推迟；放慢；延迟；阻止
　put the clock ～　倒行逆施；开倒车
　read...～　读出（信息内容等）以供核对
　refer...～ (to)　（将文件等）退回、交回给…予以某种处理；重新提及
　report ～ (to)　归来报到；作调查汇报
　ring ～　再打电话；回电话
　roll ～　（使）卷起来；把（录音带等）卷回；（浪潮）退落；撤退，击退；（过去的时光）返回
　run ～　倒卷，倒回（影片、录音带等）
　run ～ over　回顾；再次审议
　send ～　（因不满意）送回，退还（商品或饭菜）
　set ～　耽误，阻碍进展；使…破费；使（建筑物）坐落在离开…一定的距离
　settle ～　安坐在椅子里
　shrink ～ (from) 　（由于害怕）畏缩；退缩
　sit ～　在一旁闲着，袖手旁观
　spring ～　弹回
　stand ～　位于离…有一段距离的地方；保持距离以便更好地理解或判断；拒绝介入；退出
　step ～　后退
　take ～　使回来；归来；同意接受退货；重新任命被解职者；收回，撤回
　take sb ～ (to)　使某人回想起
　talk ～　回嘴，顶嘴
　think ～ on　回想，回忆
　think ～ to　回想，回忆
　throw ～　扔回；揭去，拉开；阻击，耽误，击退；（责备地）向…重提
　throw ～ on　迫使…依靠
　trace ～ (to)　追溯；回溯
　turn ～ 　（使）折回，往回走
　whip ～　迅速返回或弹回
　win ～　赢回，夺回
　wind ～　（磁带）倒带；（胶卷）倒卷

　The crowd fell back to let the fire engine through.　人群向后退去，以便给消防车让路。
　Our army forced the enemy to fall back.　我军迫使敌军撤退。
　I bent back too far and hurt my neck.　我向后仰得过度了，扭伤了脖子。
　I hope you'll never change back from the person you have recently become.　你最近跟过去判若两人，我希望你不要故态复萌。
　Students have no way of getting back at a teacher who marks their work unfairly.　学生无法报复评分不公道的老师。
　The sight of the garden bears back the days when we lived in Paris.　见到那个花园使我们回想起当年住在巴黎时的日子。
　It was he who bore back the latest news.　是他带回了最新的消息。
　He will be back before the month is out.　他将在月底前回来。
　He is sure to be back soon.　他不久一定会回来。
　I shall be back this evening. I'm not sure what train.　我今晚回去，但说不准哪趟火车。
　After a year in the hospital, he's back in circulation.　住了一年医院之后，他又活跃起来了。
　That smell of freshly baked bread carries me back!　新烤面包的气味使我忆起往事！
　May I borrow your pen?I'll bring it back tomorrow.　我可以借用一下你的钢笔吗?我明天还。
　Don't bend the book back, you'll damage it.　别向后卷书，会弄坏的。
　Would you carry the chairs back into the house for me?　你能替我把这些椅子送回那个屋子里吗?

 ♣ answer back
　参见answer条。
 ♣ back and forth
　来回地　from one place to another and back again repeatedly
　I spend more than three hours a day going back and forth to the office.　我每天上下班途中要花三个多小时。
　The wind moved the twigs gently back and forth.　风吹得树枝轻轻地来回摇晃。
 ♣ get one's own back
　参见get条。
 ♣ go back on one's word
　参见go条。
 ♣ hold back
　参见hold条。
 ♣ keep back
　参见keep条。
 ♣ pay back
　参见pay条。
 ♣ there and back
　往返，来回　to a place and back again
　Can I go there and back in one day?　我能够一天打来回吗?

 ♣ back, backwards
　这两个词都有“向…后；在…后”之意，表示方向时可互换。其区别在于：back侧重于方向或原始位置或状态的恢复；而backwards则侧重于动作进行的方式。
 ♣ back, behind
　这两个词都有“在…之后”的意思。其区别在于：behind是介词，指在某物或某时间之后；back是副词，与另外的物〔时间〕无关。例如：
　But communications were back to normal this morning.　但是今天上午通讯恢复了正常。
　I want no monkey business behind my back.　我不准任何人背着我捣鬼。
 ♣ be back, come back, get back, go back, return
　参见return条。
 ♣ bring back, call to mind, call up, come back to, think back
　这组短语都有“回忆起”的意思。其区别是：
1. 在含意上，bring back指从现在的事物中引起对过去事情的回忆，含触景生情之意，主语是人时意为“记起；想起”，主语为事物时意为“使想起”;come back to和think back指“回忆起”某事物；call to mind主语是人时意为“记起；想起”，主语为事物时意为“使想起”;call up的含意与bring back相同，但主语通常为事物，不指人。
2. 在用法上，bring back通常用memory作宾语；come back多用被想起的事物或it作主语，to后接表人的词或mind, memory等与记忆有关的词作宾语表示“回忆起”某事物；think back的主语多指人，如指事物则常与make作补语，back后常接"to〔on〕+被想起的事物”;call to mind不用于被动结构，其中的call为及物动词，其宾语多置于mind之后，mind可有物主代词修饰。
 ♣ date back to, go back to, run back to, trace back to
　这组短语都指“追溯到”过去某时、某时期或过去发生的某事的意思。其区别是：date back to指“始于，追溯到”，强调某事物开始的时间，一般不用被动结构，常用一般时；go back to和run back to意思相同，但run back to少用，均多指友谊、家事的起源，强调从现在起回到过去开始的某一时期；trace back to与go back to, run back to意思相近，但更强调追根溯源。
 ♣ hold back, keep back, put back, set back
　这组短语都有“推迟；延迟”的意思。其区别是：
1. 从含意上说，hold back和keep back都表示“推迟”某事的进行或某人做某事，强调比通常或预定的时间要晚；put back和set back都指某事因某种原因而“被推迟”进行。
2. 从用法上说，hold的宾语可以是人，也可以是物，可用于被动结构；put back和set back后可加to短语指被延期到未来的某时候进行，一般用被动结构。

　你看完这本书后，请把它还回图书馆。
　［误］ When you finish the book, please return it back to the library.
　［正］ When you finish the book, please return it to the library.
　［析］ return表示“归还，送回”，含有“回”的含义，不能再用back.

　［反义词］ n. face, front, stomach, fore, head, advance, approach v. assist, help, stand by, support adj. delayed, earlier, elapsed, former, outdated, overdue, past, previous, prior