常用英语短语
back and forth 来回地，反复地
常用口语句子
She swayed gently back and forth to the music.
她随着音乐轻轻地来回摇摆。
He was pacing back and forth across the room.
他在房间里来回踱步。
The wind moved the trees gently back and forth.
风吹得树轻轻地来回摇晃。
gently ['d?entli] adv. 温和地，静静地
常用英语短语
back away 后退，撤退，放弃
常用口语句子
The child backed away from the big dog.
那个孩子看见大狗就向后退了。
He refused to back away from his position.
他拒绝放弃自己的立场。
He never backed away from difficulties.
他从来没有在困难面前退却过。
refuse [r?'fju?z]v. 拒绝，回绝
常用英语短语
back door 后门；秘密途径
常用口语句子
Don't forget to lock (up) the back door.
别忘了锁后门。
Let's try knocking at the back door.
咱们敲后边的门试试。
He used his influential friends to help him get into the civil service by the back door.
他利用那些有权有势的朋友帮助他走后门，到政府行政部门任职。
influential[，?nflu'en?l] adj. 有影响的，有说服力的
常用英语短语
back down/off 放弃，打退堂鼓；让步
常用口语句子
He proved that he was right and his criticshad to back down/off.
他证明了他是正确的，而那些非难他的人不得不收起他们那一套。
He was too proud to back down and admitmistakes.
他傲气十足，不肯让步和承认错误。
After several hours' negotiations， theyfinally backed down on their unreasonable demands.
经过几个小时的谈话后，他们终于放弃了不合理的要求。
negotiation [n?，g?u??'e??n] n. 商议，谈判
常用英语短语
back of 在……后面
常用口语句子
He leant on the back of the sofa.
他斜靠在沙发的背上。
Three people can sit in the back of this car.
这车的后座可坐3个人。
He likes sitting in the back of the class.
他一直喜欢坐在教室的后排。
常用英语短语
back out 食言；罢手，退缩
常用口语句子
It's too late to back out now.
现在要打退堂鼓为时已晚。
Once you've given your word， don't try to back out.
一旦许下诺言，就不要想反悔。
The bank backs out of the contract.
银行终止该项合同。
contract ['k?ntr?kt] n. 合同
常用英语短语
back to back 背靠背地；（一个接一个）连续
常用口语句子
Stand back to back and let's see who's taller.
背靠背站好，看看谁的个子高。
Our seats on the train were back to back.
我们在火车上的座位是背靠背的。
We had back to back deliveries.
我们要送的外卖实在太多了。
常用英语短语
back up 后退；拥堵，堵塞；后备，支援；（资料）备份
常用口语句子
You can back up another two yards.
你可以再后退两码。
The bus had to back up and turn around.
那辆公共汽车不得不先往后退，然后再掉头。
To back up files is tedious work.
把文档备份是一项枯燥无味的工作。
tedious ['ti?d??s] adj. 令人厌倦的，烦人的
常用英语短语
bad blood 怨恨，不满，恶感
常用口语句子
There has been bad blood between the two families for years.
这两家积怨已经很多年了。
There is bad blood between them.
他们之间感情不和。
He made bad blood between John and Mary.
他在约翰和玛丽之间挑拨离间。
常用英语短语
bad debts 坏账
常用口语句子
Collecting bad debts is often a difficult affair.
收呆账往往是件棘手的事。
The biggest worry for banks is bad debts.
银行最担心的坏账。
My business is in financial trouble because of a series of bad debts.
因为有许多收不回的债款，我的生意陷入了财政困难。
financial [fa?'n?n?l]adj. 金融的，财政的
常用英语短语
bad luck 倒霉运
常用口语句子
Bad luck seems to follow me everywhere.
倒霉运好像随时随地都跟着我。
She has had a long streak of bad luck.
她遭遇了一连串的不幸。
Bad luck！ I've missed the school bus.
真糟糕，我误了校车了。
streak [stri?k] n. 连赢或连输的一段时间
常用英语短语
bad manners 不礼貌，不规矩
常用口语句子
It's bad manners to stare at people.
瞪着眼睛看人是不礼貌的。
It's bad manners to talk with your mouthfull.
吃饭的时候说话是不礼貌的。
I was annoyed by his bad manners.
他的无礼使我恼怒。
stare[ste?(r)]v. 凝视，盯着看
常用英语短语
bad news 坏消息；添麻烦的人；倒霉的事情
常用口语句子
You seem upset - not bad news， I hope？
你好像很心烦——我希望没有坏消息吧？
He is a bad news. Nobody likes him.
他是个讨厌鬼，没有人喜欢他。
His face turned gray as he heard the badnews.
听到这个坏消息后，他的脸变得苍白。
常用英语短语
bare of 几乎没有，缺乏
常用口语句子
The little room was almost bare of furniture.
这个小房间几乎没有什么家具。
The trees were almost bare of leaves.
那些树上几乎没有叶子。
If a country is bare of natural resources， it will have a poor economy.
如果一个国家缺少自然资源，它的经济就不会景气。
furniture['f??n?t??(r)] n. 家具
natural resources 自然资源
常用英语短语
base on/upon 把……建立在，以……为基础
常用口语句子
This novel is based on historical facts.
这部小说是以历史事实为根据的。
Their relationship was based upon mutual respect.
他们的关系是基于相互尊重。
Fluctuating prices usually base on a fickle public's demand.
物价的波动往往是由于群众需求的不稳定而引起的。
historical [h?'st?r?kl] adj. 历史（上）的
mutual['mju?t?u?l] adj. 相互的，彼此的
fluctuate['fl?kt?ue?t] v. 涨落，波动
常用英语短语
be a steal 便宜货
常用口语句子
The hat is a steal at 10 yuan这帽子只卖10元，真便宜。
Ladies and gentlemen， it's a steal at only$50.
女士们、先生们，这个只卖50美元，太便宜啦。
At $ 50 this TV set was a steal！
这台电视机只卖50美元，真是便宜！
常用英语短语
be able to 能够
常用口语句子
The child is not yet able to write.
这个孩子还不会写字。
Will you be able to come？
你能来吗？
I'm sorry that I wasn't able to phone you yesterday.
抱歉，我昨天没能给你打电话。
常用英语短语
be about to 准备，将要，正打算
常用口语句子
As I was about to say when you interrupted me...
我正要说的时候，你插嘴了……We're about to start.
我们即将动身。
We were just about to leave when Jerry arrived.
我们正要离开的时候杰瑞来了。
interrupt [，?nt?'r?pt] v. 打断（某人）讲话，.
打岔
常用英语短语
be accustomed to 习惯于……
常用口语句子
We were accustomed to working together.
我们习惯于在一起工作。
You must be accustomed to getting up early.
你必须习惯早起。
You will be accustomed to the climate soon.
你很快就会习惯这气候的。
climate ['kla?m?t] n. 气候
常用英语短语
be all set 准备就绪
常用口语句子
Are we all set？
我们都准备好了吗？
We were all set to go when the telephone rang.
我们都准备好要走时电话铃响了。
Is everything all set for the party？
派对的诸事都准备好了吗？
常用英语短语
be available to 可用，可供
常用口语句子
When would you be available to start work here？
你什么时候可以开始来这边上班？
When would you be available to see them？
你什么时候有时间去看他们？
Not enough data is available to scientists.
没有足够的资料数据供科学家用。
常用英语短语
be becoming 合适，好看
常用口语句子
Your outfit is most becoming.
你的服装太合适了。
Her short hairstyle is very becoming.
她的短发型很好看。
It was not very becoming behaviour for a teacher.
这种举止与一个教师的身份不太相称。
outfit ['a?tf?t] n. 一套衣服
hairstyle ['he?sta?l] n. 发型
behaviour [b?'he?vj?(r)] n. 举止
常用英语短语
be bent on 专心致志于
常用口语句子
She is bent on becoming a film star when she grows up.
她一心想长大后当一名影星。
My thoughts were bent on seeing the world.
我一心一意想去遨游世界。
Joyce is bent on buying a new house.
乔伊斯一心想买一套新住房。
常用英语短语
be better off 境况较好；较为明智的
常用口语句子
He'd be better off going to the police about it.
他最好把这件事报告警方。
We'd be better off without them as neighbours.
要是没有这家邻居，我们就过得更愉快了。
You will be better off.
你的状况会好起来的。
常用英语短语
be bound for 去，准备去，开往……
常用口语句子
Where are you bound for？
你要去哪儿？
We are bound for home.
我们打算回家。
The train is bound for Denver.
这趟列车开往丹佛。
常用英语短语
be bound to 必定，肯定
常用口语句子
The weather is bound to get better tomorrow.
明天天气一定会变好。
You've done so much work that you'rebound to pass the exam.
你下了这么大工夫，一定能考及格。