1 showing the person that will use or have sth （引出使用者或所有者）: Here is a letter for you. 这是你的信。He made lunch for them. 他给他们做午饭。It's a book for children. 这是一本儿童读物。

2 in order to do, have or get sth （表示目的）: What's this gadget for? 这玩意儿是做什么用的？What did you do that for (= Why did you do that)? 你干吗那样做？Do you learn English for your job or for fun? 你学英语是为了工作还是为了兴趣？She asked me for help. 她求我帮忙。Phone now for information. 马上打电话查询一下。to go for a walk/swim/drink 去散步╱游泳╱喝一杯

3 in order to help sb/sth 为了帮助…: What can I do for you? 你需要些什么？You should take some medicine for your cold. 你该吃点药治感冒。Doctors are fighting for his life. 医生们正在抢救他。shampoo for dry hair 干性头发的洗发剂

4 in support of (sb/sth) 支持: Are you for or against shops opening on Sundays? 商店在星期天开门做生意，你赞成不赞成？

5 meaning sth or representing sb/sth 意为…；代表…: What's the ‘C’ for in ‘BBC’? BBC的C代表什么？What's the Russian for ‘window’? window在俄语里叫什么？She plays hockey for England. 她代表英格兰打曲棍球。

6 showing the place that sb/sth will go to （引出目的地）: Is this the train for Glasgow? 这是到格拉斯哥去的火车吗？They set off for the shops. 他们出发去买东西。

7 (showing a reason) as a result of （引出原因）由于: Ben didn't want to come for some reason. 阿本由于某种原因不想来。He was sent to prison for robbery. 他因为抢劫而坐牢。I couldn't speak for laughing. 我笑得连话也说不了。

8 (showing the price or value of sth); in exchange for （引出价钱或价值）以…为代价: I bought this car for £2000. 这辆汽车我花了2000英镑买下来的。You get one point for each correct answer. 每答对一题得一分。I want to exchange this sweater for a larger one. 这件套衫我想换一件尺寸大一点的。The officer was accused of giving secret information for cash. 那名官员被指控为了钱出卖机密情报。

9 showing a length of time （表示一段时间）: I'm going away for a few days. 我要外出几天。for a while/a long time/ages 经过一会儿╱很长时间╱极长时间They have left the town for good (= they will not return). 他们已经离开这个镇，永远不回来了。He was in prison for 20 years (= he is not in prison now). 他坐过20年牢。He has been in prison for 20 years (= he is still in prison). 他坐牢坐了20年了。

10 showing how many times sth has happened （表示某事发生了多少次）: I'm warning you for the last time. 这是我最后一次警告你。I met him for the second time yesterday. 昨天我跟他第二次碰头。

11 at a particular, fixed time 在某个特定或固定的时间: What did they give you for your birthday? 你生日的时候他们送给你什么？Shall we have eggs for breakfast? 我们早餐吃鸡蛋，好不好？I'm going to my parents' for Christmas. 我要去父母那儿过圣诞节。The appointment is for 10.30. 约会定在10点半。

12 showing a distance （表示距离）: He walked for ten miles. 他走了十英里路。

13 (after an adjective 用于形容词后) showing how usual, suitable, difficult, etc sb/sth is in relation to sb/sth else （表示相比之下有多平常、合适或困难等）: She's tall for her age. 以她的年龄，她长得算高了。It's quite warm for January. 就一月份来说，这样的天气算是暖和的了。It's unusual for Alex to be late. 亚历克斯迟到是不寻常的事。I think Sandra is perfect for this job. 我认为桑德拉做这工作很合适。