同位语从句

前后两者表达内容相同时，后者叫做前者的同位语。

• My friend is a teacher.

  • My friend, David, is a teacher.

    • My friend = David,即同位语

• Put it there.

  • Put it there, on the table.

    • there = on the table,即同位语

当同位语不是一个短语或短语而是一个句子的话，就是同位语从句。

同位语从句的引导词

• that引导陈述句，无意义，不可省略

  • The teacher likes cats. The news ___ is unknown.

    • The news that the teacher likes cats is unknown.

• whether引导一般疑问句,意味是否(同位语从句中不用if)

  • Is she a nurse? The question ___ is easy.

    • The question whether she is a nurse is easy.

  • Can you dance? The question ___ is easy.

    • The question whether you can dance is easy.

  • Did he sleep? The question ____ is easy.

    • The question whether he slept is easy.

• 特殊疑问词引导特殊疑问句

  • What is this? The question ___ makes me confused.

    • The question what this is makes me confused.

  • How will you sing? The quesiton ___ is important.

    • The question how you will sing is important.

小技巧

同位语从句的语序: 陈述语序：主语 + 动词

名词性从句

• 主语从句

• 宾语从句

• 表语从句

• 同位语从句

因为在一个句子里面中，它们通常可以由名词来充当。它们的从句有大部分共通之处。

备注

定语从句为形容词性从句. 状语从句为副词性从句.