A pronoun that introduces a relative clause and has reference to an antecedent, aswho in the child who is wearing a hat or that in the house that you live in.关系代词:引出一个关系从句并和先行词的关联的代词,例如在the child who is wearing a hat(戴着一顶帽子的那个孩子) 中的 who 或者 the house that you live in(你住的那间房子) 中的 that