for

In addition to the uses shown below, for is used after some verbs, nouns, and adjectives in order to introduce extra information, and in phrasal verbs such as ‘account for’ and ‘make up for’. It is also used with some verbs that have two objects in order to introduce the second object.
除下列用法外，for 还可以用在一些动词、名词和形容词后，以引出更多信息，还可以用于 account for，make up for 等短语动词中。for 还可以和一些有双宾语的动词连用，引出第二个宾语。

1. (表示对象)为了，给，对于
If something is for someone, they are intended to have it or benefit from it.

e.g. Isn't that enough for you?...
那对你来说不够吗？
e.g. I have some free advice for you.
我可以为你提供免费咨询。

2. 受雇于
If you work or do a job for someone, you are employed by them.

e.g. I knew he worked for a security firm...
我知道他在一家保安公司工作。
e.g. Have you had any experience writing for radio?
你有给电台写稿子的经验吗？

3. 代表(群体或组织)
If you speak or act for a particular group or organization, you represent them.

e.g. She appears nightly on the television news, speaking for the State Department.
她作为国务院的发言人，每晚都会出现在电视新闻中。
e.g. ...the spokesman for the Democrats.
民主党发言人

4. 帮助;为了
If someone does something for you, they do it so that you do not have to do it.

e.g. If your pharmacy doesn't stock the product you want, have them order it for you...
如果药店没有你想要的药品，让他们为你订购。
e.g. I hold a shop door open for an old person...
我帮一位老人把住店门。

5. 替…(感到);为…(感到)
If you feel a particular emotion for someone, you feel it on their behalf.

e.g. This is the best thing you've ever done – I am so happy for you!...
这是你做得最棒的一件事——我为你感到高兴！
e.g. He felt a great sadness for this little girl.
他为这个小女孩深感悲哀。

6. (表示情感的对象)对
If you feel a particular emotion for someone or something, they are the object of that emotion, and you feel it when you think about them.

e.g. John, I'm sorry for Steve, but I think you've made the right decisions...
约翰，我为史蒂夫感到难过，但是我想你的决定是正确的。
e.g. Mack felt a pitiless contempt for her.
麦克对她没有同情，只有鄙夷。

7. 供…之用;为…所需
You use for after words such as 'time', 'space', 'money', or 'energy' when you say how much there is or whether there is enough of it in order to be able to do or use a particular thing.

e.g. Many new trains have space for wheelchair users...
许多新型列车为坐轮椅者留有空间。
e.g. It would take three to six hours for a round trip...
往返行程需要 3 到 6 个小时。

8. 供(销售、租用等)
If something is for sale, hire, or use, it is available to be sold, hired, or used.

for是什么意思

e.g. ...fishmongers displaying freshwater fish for sale...
摆摊卖淡水鱼的鱼贩
e.g. Skis are available for hire on a daily basis.
雪橇可以按天租用。

9. (表示用途或目的)为了，用来
You use for when you state or explain the purpose of an object, action, or activity.

e.g. ...drug users who use unsterile equipment for injections of drugs...
使用未经消毒的注射器注射毒品的吸毒者
e.g. The knife for cutting sausage was sitting in the sink.
切香肠用的刀放在水槽里。

10. (置于名词后)因为，由于
You use for after nouns expressing reason or cause.

e.g. He's soon to make a speech in parliament explaining his reasons for going...
他很快要在议会发表讲话，说明他辞职的原因。
e.g. The county hospital could find no physical cause for Sumner's problems...
关于萨姆纳的问题，县医院查不出任何生理上的原因。

11. (引导从句)因为，为了
You can use for to introduce a clause which gives the reason why you made the statement in the main clause.

e.g. He had a great desire to have a home of his own for he had always lived with my grandmother.
他强烈渴望拥有一个属于自己的家，因为他一直和我祖母住在一起。

12. 因为;以…为原因
You can use for to introduce the cause of the fact that you have just mentioned.

e.g. ...doing jobs that others turn down for lack of skill...
做别人不愿意做的没有技术含量的工作
e.g. They cannot sleep for hunger.
他们饿得睡不着。

13. (用于条件句中)如果不是为了，要不是
For is used in conditional sentences, in expressions such as 'if not for' and 'were it not for', to introduce the only thing which prevents the main part of the sentence from being true.

e.g. If not for John, Brian wouldn't have learned the truth...
要不是因为约翰，布赖恩也不可能知道真相。
e.g. The earth would be a frozen ball if it were not for the radiant heat of the sun...
如果没有太阳辐射的热量，地球就会变成一个冰球。

14. (表示时间)持续
You use for to say how long something lasts or continues.

for的解释

e.g. The toaster remained on for more than an hour...
烤面包机持续开了一个多小时。
e.g. For a few minutes she sat on her bed watching the clock...
她坐在床上盯着时钟看了几分钟。

You use for to say how long a period lasts in the past, present, or future, or how much time passes without something happening. She slept for eight hours… He will be away for three weeks… I hadn't seen him for four years. You use since to say when a period of time started. She has been with the group since it began. …the first civilian president since the coup 17 years ago. You also use since to refer to the last time that something happened, or to how much time passes without something happening. She hadn'teaten since breakfast… It was a long time since she had been to church.
for 用于表示在过去、现在或将来持续的一段时间，或某事发生之前的时间长短。例如：She slept for eight hours (她睡了8个小时)，He will be away for three weeks (他要离开3周)，I hadn't seen him for four years (我已经4年没见过他了)。since 用于表示一段时间的开始，例如：She has been with the group since it began (这个集团创建之初她就在那里工作)，the first civilian president since the coup 17 years ago (自17年前的政变以来的首位平民总统)。since 也可用于指某事最后一次发生的时间或某事发生之前的时间长短，例如：She hadn't eaten since breakfast (她早饭后就没吃过东西)，It was a long time since she had been to church (她很长时间没去教堂了)。

15. (表示距离)延伸
You use for to say how far something extends.

e.g. We drove on for a few miles...
我们继续往前开了几公里。
e.g. Great clouds of black smoke were rising for several hundred feet or so.
大片的黑色烟云升至大约几百英尺的空中。

16. 花费;以…的价钱
If something is bought, sold, or done for a particular amount of money, that amount of money is its price.

e.g. We got the bus back to Tange for 30 cents...
我们花了 30 美分坐公共汽车回到坦格。
e.g. The Martins sold their house for about 1.4 million pounds...
马丁夫妇把他们的房子卖了 140 万英镑。

17. 在(指定的时间)
If something is planned for a particular time, it is planned to happen then.

e.g. ...the Welsh Boat Show, planned for July 30–August 1...
预定于 7 月 30 日至 8 月 1 日期间举办的威尔士船展
e.g. Marks & Spencer will be unveiling its latest fashions for autumn and winter...
玛莎百货的最新款秋冬季时装即将亮相。

18. 在，为了(某个场合)
If you do something for a particular occasion, you do it on that occasion or to celebrate that occasion.

e.g. He asked his daughter what she would like for her birthday...
他问女儿过生日想要什么。
e.g. I'll be home for Christmas.
我会回家过圣诞节。

19. 去;前往
If you leave for a particular place or if you take a bus, train, plane, or boat for a place, you are going there.

e.g. They would be leaving for Rio early the next morning.
他们第二天一早要去里约。

20. 对…来说
You use for when you make a statement about something in order to say how it affects or relates to someone, or what their attitude to it is.

for

e.g. What matters for most scientists is money and facilities...
对多数科学家来说，资金和设备是至关重要的。
e.g. For her, books were as necessary to life as bread...
对她来说，书就像面包一样，是生活必需品。

21. (用于形容词、名词和动词短语后，引出其后动词不定式的主语)
After some adjective, noun, and verb phrases, you use for to introduce the subject of the action indicated by the following infinitive verb.

e.g. It might be possible for a single woman to be accepted as a foster parent...
有可能会接受单身女子作为领养人。
e.g. I had made arrangements for my affairs to be dealt with by one of my children...
我已经安排我的一个孩子处理我的事务。

22. 就…而言(表示相对来说不寻常)
You use for when you say that an aspect of something or someone is surprising in relation to other aspects of them.

for的近义词

e.g. He was tall for an eight-year-old...
对一个 8 岁的孩子而言，他长得很高。
e.g. He had too much money for a young man.
对于一个年轻人来说，他太有钱了。

23. 愿意做;打算从事;想要
If you say that you are for a particular activity, you mean that this is what you want or intend to do.

e.g. Right, who's for a toasted sandwich then?...
好吧，谁想要吐司三明治？
e.g. 'What'll it be?' Paul said. —'I'm for halibut.'
“要吃什么？”保罗说。——“我要吃大比目鱼。”

24. 为…喜欢;对…适合
If you say that something is not for you, you mean that you do not enjoy it or that it is not suitable for you.

for在线翻译

e.g. Wendy decided the sport was not for her...
温迪认定这项运动不适合她。
e.g. Not for me the settled life...
安定的生活并不适合我。

25. (表示负有责任或享有权利)由…
If it is for you to do something, it is your responsibility or right to do it.

e.g. I wish you would come back to Washington with us, but that's for you to decide...
我希望你能和我们一起回华盛顿，但是这由你决定。
e.g. It is not for me to arrange such matters.
我无权安排这些事情。

26. 支持;同意
If you are for something, you agree with it or support it.

e.g. Are you for or against public transport?...
你是支持还是反对公共交通？
e.g. I'm for a government that the people respect and that respects the people...
我拥护一个受到人民尊重并且尊重人民的政府。

27. (用于 argue, case, evidence, vote 等词后，引出所支持或被证明之事)
You use for after words such as 'argue', 'case', 'evidence', or 'vote' in order to introduce the thing that is being supported or proved.

e.g. Another union has voted for industrial action in support of a pay claim...
另一个工会已经投票赞成采取要求加薪的劳工行动。
e.g. The case for nuclear power is impressive...
这个支持核能的案例令人印象深刻。

28. (置于某些名词、形容词或动词后，引出更多信息或与某性质、事物或行为相关的事物)
For is the preposition that is used after some nouns, adjectives, or verbs in order to introduce more information or to indicate what a quality, thing, or action relates to.

e.g. Reduced-calorie cheese is a great substitute for cream cheese...
低卡路里干酪是奶油干酪的极佳替代品。
e.g. Car park owners should be legally responsible for protecting vehicles...
停车场场主有保护停放车辆的法律责任。

29. 以…命名
To be named for someone means to be given the same name as them.

e.g. The Brady Bill is named for former White House Press Secretary James Brady...
布雷迪法案是以前白宫新闻秘书詹姆斯·布雷迪的名字命名的。
e.g. Ayer started N. W. Ayer & Son in 1869, naming the firm for his father.
艾尔在1869 年成立了 N. W. 艾尔父子公司，公司以他父亲的名字命名。

in BRIT, use 英国英语用after

30. (与 every 连用，引出比率)每…(就有…)
You use for with 'every' when you are stating a ratio, to introduce one of the things in the ratio.

e.g. For every farm job that is lost, two or three other jobs in the area are put at risk...
在该地区每有一个农民失去工作，另外两到三个从事其他工作的人就会面临失业的危险。
e.g. Where there had been one divorce for every 100 marriages before the war, now there were five.
战前每100对夫妇中有一对离婚，现在则是 5 对。

31. (用于比较)每镑对每镑/每英里对每英里
You can use for in expressions such as pound for pound or mile for mile when you are making comparisons between the values or qualities of different things.

e.g. ...the Antarctic, mile for mile one of the planet's most lifeless areas...
南极洲的每一寸土地和世界上其他地方相比都是最荒芜的
e.g. He insists any tax cut be matched dollar-for-dollar with cuts in spending.
他坚持每一项减税都要和支出削减一一对应。

32. (意思)相当于，等于
If a word or expression has the same meaning as another word or expression, you can say that the first one is another word or expression for the second one.

e.g. The technical term for sunburn is erythema...
晒斑的专业术语是红斑。
e.g. Cancer is derived from the Greek word for crab, karkinos.
cancer 这个词派生自希腊语中表示螃蟹的 karkinos 一词

33. (引出可在其他地方找到的信息)至于，对于
You use for in a piece of writing when you mention information which will be found somewhere else.

for是什么意思

e.g. For further information on the life of William James Sidis, see Amy Wallace, 'The Prodigy'.
想了解关于威廉·詹姆斯·西迪斯生平的更多信息，请参阅埃米·华莱士所著《神童》。

Both for and to can be used to talk about somebody's purpose, but in different structures. For must be followed by a noun when expressing purpose. Occasionally I go to the pub for a drink.For is not normally used before a verb. You cannot say 'I go to the pub for to have a drink'. You can use for before an -ing form to describe the purpose of an object. …a small machine for weighing the post. With verbs, the infinitive is used without 'for'. She then went off to fetch help.
for 和 to 都可以用于谈论某人的目的，但是所用结构不同。表示目的时，for 后面必须接名词，例如:Occasionally I go to the pub for a drink (我偶尔会到酒吧里喝一杯)。for 一般不用在动词前。不能说I go to the pub for to have a drink。可以在-ing形式前用for来描述某物的用途，例如:a small machine for weighing the post (给邮件称重的小机器)。for 不与动词不定式连用, 如: She then went off to fetch help (她接着出去找人帮忙)。

34. (尽管有不同意见或实际困难)完全赞成,坚信
If you say that you are all for doing something, you agree or strongly believe that it should be done, but you are also often suggesting that other people disagree with you or that there are practical difficulties.

for

e.g. I am all for cutting carbon dioxide emissions, but that would be much more easily achieved by giving subsidies to windpower, than with nuclear power...
我完全赞成减少二氧化碳的排放，但是，相比发展核能，对发展风能提供补贴更容易实现这一目标。
e.g. He is all for players earning what they can while they are in the game...
他完全赞成现役运动员尽可能多赚钱。

35. 会惹麻烦;要闯祸
If you are in for it or, in British English, if you are for it, you are likely to get into trouble because of something you have done.

for

36. 首次/最后一次
You use expressions such as for the first time and for the last time when you are talking about how often something has happened before.

for在线翻译

e.g. He was married for the second time, this time to a Belgian...
他第二次结婚，这一次是和一个比利时人。
e.g. For the first time in my career, I was failing.
我职业生涯中第一次经历失败。

37. but for -> see but
for all -> see all

1. 循环语句：算法:定义一个整数型变量i,使用循环语句(for)让i从2到n-1,在每个循环里让n除以i,如果能整除则在屏幕上打印i. 很简练吧~^_^

2. 循环：for (i=0; ifor)控制输入 */for (i=0; ifor)控制输出 */任何一种计算机语言都要从某种人们容易理解的形式(源代码)转化成计算机可以执行的形式(机器指令).

3. for：free on railroad; 火车上交货

4. for的反义词

4. for：fund outflow ratio; 资金外流比例

5.

5. for：forced outage rate; 强迫停机率

6. for：fuel oil return; 燃料油回路