摘要：(五).定语从句中的先行词 Is this book the one that you bought yesterday? Is this the book that you bought yesterday? 第一个句子中.this book是主句的主语.the one 是先行词.在第二个句子中this是主句的主语.the book是先行词.一定要避免出现:Is this book that you bought yesterday?

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