| 三、句型结构 1. — Who is this? 询问离自己较近的人是谁。
 — This is ... 这是……。
 eg: Who is this? 这是谁?
 This is my mother. 这是我妈妈。
 2. — Who is that? 询问离自己较远的人是谁。
 — That’s ...  那是……。
 
 eg:—  Who is that? 那是谁?
 — That’s my uncle. 那是我叔叔。
 3. This is ... 用于向另外一个人介绍某人。
 Eg: This is my friend, Jack. 这是我的朋友,杰克。
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