1 used to show who is intended to have or use sth or where sth is intended to be put (给，对，供）example:1）There is a letter for you. 有你一封信 2 ）its a book for children这是本儿童读物 3 ）We got a new table for the dining room 我们给饭厅添了一张新桌子。 2 in order to help sb/sth 以帮助，为了 example;1)what can I do for you？有什么事我可以为你效劳么？ 2）can you translalte this letter for me ?你能为我翻译这封信么？ 3 concerning sb/sth 关于 example：1）they are anxious for safety 他们为她的安全担心 4 as a representative of 代表 ex：I am speaking for everyone in this department 我代表这个部门的全体员工发言 5 employed by 受雇于 she is working for IBM 她在IBM公司工作 6meaning 意思 shaking your head for "no" 摇头是不得意思 7in support of 支持；拥护 Are you for or aganist the proposal 8 used to show purpose or function 表示目的或功能 ex： lets go for a walk 咱们去散散步 9used to show a reason or cause 因为 由于 ex ：the town is famous for its cathsdral 这个城镇以大教堂著名 10 used to show where is goning 往 向 ex ：is this bus for Chicago？这辆车是去芝加哥的么？ 11 used to show a length of time 表示一段时间 ，距离ex ：i am goning for some time 我要离开一段时间 the road went on for miles and miles 这条路绵延数英里 Hi , you can let your friend who is in china buy a << ADVANCED LEARNER`S English-Chinese Dictingnaty>> for you I used it to improve my English . but it can also help you learn Chinese better! (*^__^*) 嘻嘻…… Can you add my MSN？it is zaiyang009live.cn 。I want to be your friend