We looked for them, but we could not find them all.

While we were having breakfast, our little boy, Tommy found two small coins on the floor.

同位语功能：解释名词 our little boy, Tommy ^{（我们的小男孩，托米）}

同位语结构：名词/名字（待解释），带有名字、名词的短语(解释内容)即：名词 + 名字 or 名字 + 名词

• 中国, an ancient country in Asia.
• 林书豪, a popular basketball player from Taiwan.
• 海淀, a well-known district in Beijing.
• Yangmi, a pretty film star.
• I am from China, an ancient country in Asia. 我来自中国，一个亚洲古老的国家。
• I live in Haidian, a well-known district in Beijing.我居住在海淀，北京的一个知名的区。

同位语提供关于一个名词或代词的额外信息，进一步说明或解释该名词或代词。同位语通常紧跟在被说明的名词或代词后面，用逗号或破折号与之隔开。
同位语结构可以是一个名词、代词、名词短语、或完整的从句。它们的作用是进一步描述前面的名词或代词，并提供额外的补充信息。

• My friend John, a talented musician, performed at the concert. ^{（我的朋友约翰，一位有才华的音乐家，在音乐会上演出。）} "a talented musician" 进一步描述了名词 "John"，提供了他的特点。
• The city of Paris, known as 'the City of Lights,' is famous for its beauty. ^{（巴黎这座被称为“光之城”的城市以其美丽而闻名。）}"known as 'the City of Lights'" 提供了关于"the city of Paris" 的进一步解释和别名。
• My sister, an avid reader, has a large collection of books. ^{（我的妹妹，一位热衷阅读的人，拥有很多书籍。）} "an avid reader" 进一步描述了名词 "my sister"，指出她的兴趣爱好。

需要注意的是，同位语结构并不是必需的，它只是提供额外的信息，使句子更具描述力和丰富性。

自我介绍：

• Hello. I’m Venus. I’m a teacher.
• I’m from Shan’xi province^(省). I live in Beijing now.

使用同位语提升后让句子变得多样^(凑字数)

• Hello. I’m Venus, an English teacher.
• I’m from Shan’xi province, a nice place in the west of China.
• I live in Beijing, the capital city of China.

He put both into his mouth. ^{这里的 both 指的是2枚硬币}

We both tried to get the coins, but it was too late.

both  ^{代词(两个都...)}

• Both are good ^{(both = the two books)}

both ^{副词（动词前、情 be后）}

• We both like English^{（动前）这里去掉 both 句子依然成立，只是缺少了数量。所以这里的both与we是同位语。}
• They can both sing ^{(情be后) 同上，both表数量2，与they是同等地位关系，用于补充说明(They 代表了2个人)。}

…but I haven’t had any change yet. ^{（一语双关）}

• change ^{改变 、找零的钱}