Ø fail in (=be unsuccessful in) 失败
　　 He failed his English examination.
　　 他的英语考试不及格。
　　 Ø in good faith(=honestly, sincerely) 真诚地
　　 This report was published in good faith but we regret any confusion which may have been caused.
　　 Ø keep faith with 对…守信用
　　 He has made one of the most powerful American films of the year by keeping faith with his radical principles.
　　 Ø lose faith in 对…失去信心
　　 People have lost faith in the British Parliament.
　　 Ø on faith 毫无怀疑地, 依赖地
　　 Are you running on faith, or do you have reasons to think it will work?
　　 Ø faithful to (=loyal to) 对…忠诚
　　 Our company is faithful to the promised terms.
　　 我们公司忠实于自己承诺的条件。
　　 Ø fall into the habit (of) 养成…习惯
　　 If you overlook such kind of mistakes and fall into the habit of spelling and writing without thinking carefully, you will most likely forget the Standard English and totally be confused eventually.
　　 Ø fall short of (=fail to reach a desired result, standard, etc) 没达到, 低于
　　 His income may fall short of his needs .他的收入达不到他的需求.
　　 Ø Live up to v. 实践, 做到(measure up to)
　　 We will live up to what our parents expect of us.
　　 我们决不辜负父母亲对我们的期望。
　　 ØDid the TV play live up to your expectations?
　　 这部电视剧有你期望的那样好吗?
　　 Ø be familiar with 熟悉,了解
　　 Are you familiar with this type of car?
　　 你熟悉这种型号的汽车吗？
　　 Ø have a fancy for ( = take a fancy to, take to) 爱好 爱上 入迷
　　 I have a fancy for that dish. 我喜欢那道菜。
　　 Ø by far adv. 1. 远, 非常 (与比较级或最高级连用) 2. 到目前为止(to date)
　　 She is by far the best executive in the company.
　　 她目前是公司中最为优秀的决策人
　　 Ø far from 远远不是
　　 The current sole superpower is far from being a disinterested observer.
　　 Ø in fashion(=stylish, most modern)时兴, 方式
　　 He behaves in a very strange fashion.
　　 他的举止很奇怪。
　　 Ø run after the fashion 赶时髦
　　 Tom is a man who runs after the fashion.
　　 Ø find fault with sth. (=complain about; criticize)找毛病，对…吹毛求疵
　　 I was disappointed whenever the cook found fault with my work.
　　 Ø at fault adv. (Deserving of blame; guilty)有罪的
　　 Tom was admitted to being at fault. 承认有罪
　　 Ø in favour of 支持...; 而不是…(instead of)
　　 If you are in favour of something, you support it and think that it is a good thing.
　　 Ø in one’s favour(=to one’s advantage)对有利
　　 In the end they decided to vote in my favour and accept you.
　　 Ø (be) favourable to(=advantageous)有利的
　　 If something makes a favourable impression on you or is favourable to you, you like it and approve of it.