before long . soon不久；很快
Before long，it will be a new year．新的一年很快就要到了。
The book will be published before long．这本书不久就要出版了。
I hope to hear from you before long．我希望不久就能收到你的信。
beg for . ask humbly for乞怜；乞讨
The old man went from house to house，begging for food．老人挨家乞食。
beg for . 请求；恳求
The wounded soldier begged for mercy．那个伤兵恳求宽恕。
He would rather starve to death than shamelessly beg for his life．他宁愿饿死也不无耻求饶。
beg off . ask to be excused； 恳求免除惩罚或责任；为某人求情
He promised to go with us，but he has since begged off． 他本来答应跟我们同往，但此后却借故推辞了。
The Headmaster means to punish him， but my father is going to try to beg him off．校长打算处罚他，但我父亲将竭力恳求免除对他处分。
begin with . start with；continue from由…开始
The first word of a sentence should begin with a capital letter．句子的第一个词应以大写字母开头。
I'll ask you to read the poem，beginning with Jane．现在我要请你们读这首诗，从简开始。
Begin with this one and do the others afterwards．先做这个，然后再做其他。
behind schedule . 比计划（预料）要晚（慢）
The train was in an hour behind schedule．火车误点一小时到达。
They are behind schedule in building the library．他们建造这座图书馆的进度比预定的要慢。
behind the scenes . behind the curtain . out of sight；secretly在幕后；秘密地
The treaty was signed behind the scenes．这项协议是秘密签订的。
The real work of the conference is being done behind the curtain．这次会议的实际工作正在幕后进行。
behind the times . old fashioned； not up to date 过时；落伍
Keller is a good teacher but he's behind the times． No one uses those methods anymore．凯勒是一个好教师，但是他已经落后了。已经没有人用他的那些方法了。
behind time . late； after the stated time迟；在规定时间之后
The bus was twenty minutes behind time．汽车晚点二十分钟。
believe in . have faith in .have trust in .相信…是真的；信赖；信仰
Christians believe in God．基督徒信仰上帝。
I don't believe in him．我不信任他。
believe in . favour； support the idea of赞成；支持；主张
His parents don't believe in sending him to school too early．他的父母不主张太早送他上学。
He believes very strongly in female emancipation．他坚决主张妇女解放。
I believe in keeping early hours．我相信早睡早起有好处。
She believes in plenty of fresh air and exercise．他相信大量的新鲜空气和锻炼有好处。
belong to .be the property of .属于
All power in China belongs to the people．在中国一切权力属于人民。
This old musical instrument has belonged to our family for a long time．我们家拥有这个古老的乐器已有很长时间了。
In our country， land doesn't belong to any individual．在我们国家，土地不属于任何私人所有。
belong to . be a member of； be connected with为…的成员；同…有关
Many people of different political views belong to the club．这个俱乐部里汇集了许多政治观点不同的人。
Over nine tenths of the inhabitants there belong to the Han nationality？那儿十分之九以上的居民属于汉族。
I don't know to which team he belongs．我不知道他是哪个队的成员。
bend on bend upon .set one's mind on； have as a fixed purpose致力于；专注于
He was bent on becoming a musician．他决心当一名音乐家。
Jack used to be bent on chemistry as a profession．杰克曾经专攻化学。
bend over . lean towards俯向
The doctor bent over the sick child．医生弯腰看那生病的孩子。
bend over . be turned over翻转
Don't bend over the pages．不要卷折书页。
beneficial to .helpful to ；useful to 有益于；有利于（通常后接非生物性名词）
Economic reform is beneficial to the development of our country．经济改革对我国发展有利。
Not all medicines are beneficial to health．不是所有的药都对身体有益。
benefit from . benefit by . gain advantage， pleasure from . profit from从…得到好处；从…受益
I have benefited a lot from the trip．这次旅行使我受益匪浅。
I believe you'll benefit from your further study．我相信你会从这次进修中学到许多东西的。
The patient will benefit by a few day's rest．病人休息几天就会好一些。
He doesn't seem to have benefited by the treatment．这种治疗看来对他没有效。
beside oneself with . at the end of one's control…得发狂；…得要命
She was beside herself with joy when she got the letter．收到那封信，她欣喜若狂，高兴得要命。
He was beside himself with grief．他极度悲伤。
Jane has been almost beside herself with toothache，but she will not go to a dentist．简牙痛得要命，可她就是不去看牙医。
beside the point . beside the mark. beside the question . having nothing to do with离题；与本题无关
That question was beside the mark and need not be answered．那个问题与本题无关，没有必要回答。
What you have said is beside the point．你所说的与题无关。