介词

英语语法中的介词是一种虚词，通常用于名词、代词等的前面，以表示其后面的名词或相当于名词的词、短语与其他句子成分之间的关系。介词在句子中不能单独作为句子成分，而是需要和它后面的词共同构成介词短语，从而在句子中充当表语、宾语补足语、状语或定语等成分。

介词

• 用法
  • 介词加名词性成分等于介词短语
    • The cat on the table is named Floppy. 名词短语
    • He walked through the park. 名词短语
    • She apologized for arriving late to the meeting. 分词短语
    • She is not certain about whether she 'll go to the party or not. 名词性从句
    • The scientists are studying the effects of climate change on the ecosystem. 名词短语
    • I am worried about the fact that I haven't heard from him in a while. 嵌套名词性从句的名词性短语
• 辨析
  • The puma is a tree.介词
  • He looked up. 副词
  • Prices are up. 形容词
• 副词性的介词短语
  • 作用
    • 修饰v.adj.adv.
      • 修饰动词
        • We went to a movie after dinner.
      • 修饰形容词
        • I am ready for dinner
      • 修饰副词
        • We got there late in the evening.
• 形容词性属性的介词短语
  • 作用
    • 一般用做后置定语，用来修饰n.
      • The book on the shelf is great. 后置定语
      • I hate the hot summers in Changsha. 后置定语
• 另类介词
  • 简单介词
    • as
    • at
    • by
    • during
    • with……
  • 分词介词
    • considering
    • including
    • given
    • granted
  • 短语介词
    • ahead of next to because of owning to along with as well as in case of in charge of in common with as a result of in the absence of to the best of with an eye to