for

/fɔː, fə/ prep.
标准词条 CET-4CET-6IELTS
一句话记住

为了；供；给；对……有益（表示目的、用途、对象或受益者）；达；计（表示持续的时间或延伸的距离）

释义与例句

prep. 为了；供；给；对……有益（表示目的、用途、对象或受益者）
used to show purpose, intended use, the person receiving something, or the person or thing benefiting
  1. This storeroom is used for keeping medical supplies cool and dry.
    这间储藏室用于存放需要阴凉干燥的医药用品。
  2. She bought a small present for her brother.
    她给弟弟买了一份小礼物。
展开其余 1 条例句
  1. Swimming is good for building strength without putting too much pressure on the joints.
    游泳有助于增强力量，又不会给关节造成太大压力。
prep. 达；计（表示持续的时间或延伸的距离）
used to show how long something lasts or how far something extends
  1. We waited for nearly an hour before the doors opened.
    我们等了近一个小时，门才开。
  2. The old railway line runs for several kilometres through the forest.
    这条旧铁路线在森林中延伸数公里。
展开其余 1 条例句
  1. He has worked for the same charity for twelve years.
    他在同一家慈善机构工作了十二年。

词源与构词

记忆钩子 for 接时间段，since 接时间点：for two hours / since noon。表示用途常用 be used for doing，表示受益者用 for sb。

词族与关联词

易混词（形近或义近，注意区别）
  • since 自从；自……以来
    for 接时间段，说明持续多久，如 for three years；since 接起点，说明从何时开始，如 since 2022。for 还可表示目的和对象，since 没有这些介词功能。
    She has lived in Leeds since 2019. 她自2019年以来一直住在利兹。
常见搭配
  • for example 例如
    Several common metals, for example copper and aluminium, conduct electricity well. 一些常见金属，例如铜和铝，导电性能良好。
  • for sale 待售；供出售
    The house next door has been for sale since March. 隔壁的房子从三月起就挂牌出售了。
  • for a while 一会儿；一段时间
    After the meeting, we sat outside and talked for a while. 会后，我们坐在外面聊了一会儿。