当两个处于同等位置的语法单位所指同一人或事物,后面成分对前面成分进行修饰、限定、说明或解释时,后面成分就是前面成分的同位语(appositive).可用作同位语的有代词、名词、数词、动名词、不定式、介词短语、从句等.例如:
They all wanted to see the film.他们都想去看那部电影.
She has two children,a boy and a girl.她有两个孩子,一男一女.
We,the Chinese people,are determined to build China into a powerful and prosperous country.我们中国人民决心将中国建成一个强大繁荣的国家.