The most urgent thing is for us to get the preparation done.

　　重要的事情是我们要把准备工作做好。

　　I don't think it advisable for him to study medicine.

　　我想她学医不适合。

　　Your parents and relatives are anxious for you to go to college.

　　你的父母和亲戚渴望你上大学。

　　My home town has changed too much for me to recognize.

　　我的家乡变化太大，简直认不出来了。

　　以上例句都是for 在不定式复合结构中的用法。

　　Someone is asking for you on the telephone.

　　有人找你接电话。(找)

　　You'd better write to me for more information about it.

　　如需更多这方面的资科和信息，你最好给我写信。(提问，索要)

　　They worked in the company for 200 yuan a month.

　　他们在这个公司干活，每月嫌200元。(价格)

　　How much did you pay for the second-hand colour TV?

　　这台用过的彩电你花了多少钱2(价格)

　　Thank you very much for your coming.

　　谢谢您的光临。〔原因)

　　Thank you for your warm hospitality.

　　谢谢您的热情款待。(原因)

　　Forgive me for being tardy.

　　请原谅我迟到了。(原因)

　　I'm much obliged to you for telling me.

　　非常感谢你给我谈了这个情况。(原因)