同位語(yǔ)的四種形式有：名詞以及短語(yǔ)（有時(shí)有逗號(hào)分開(kāi)）、動(dòng)名詞短語(yǔ)（有逗號(hào)分開(kāi)）、不定式短語(yǔ)（有時(shí)有逗號(hào)隔開(kāi)）、形容詞及其短語(yǔ)（有逗號(hào)隔開(kāi)）。一個(gè)名詞（或者其它形式）對(duì)一個(gè)名詞或者是代詞進(jìn)行的解釋或者補(bǔ)充，這個(gè)名詞（或者其它形式）句尾同位語(yǔ)。同位語(yǔ)和被它限制的詞匯的形式要一樣，并經(jīng)常緊挨在一起。

同位語(yǔ)的四種形式

1.名詞及其短語(yǔ)(有時(shí)有逗號(hào)隔開(kāi))

A.George Bush，the present American president，was the governor of the state of Texas.

B.I want very much to read these new novels，especially the one you mentioned.

2.動(dòng)名詞短語(yǔ)(有逗號(hào)隔開(kāi))

A.He enjoys the exercise，swimming in winter.

B.Asking him to join us，that’s a good idea.

3.不定式短語(yǔ)(有時(shí)有逗號(hào)隔開(kāi))

A.There is one thing he’ll never do—tell lies.

B.The question what to do next hasn’t been considered.

4.形容詞及其短語(yǔ)(有逗號(hào)隔開(kāi))

A.He，short and thin，is unfit for the job.

B.All the countries，big or small，are equal.