摘要：定语从句相当于形容词作定语. 对先行词加以限制或修饰.同位语从句相当于名词.对先行词加以补充或说明.连接词that在定语从句中充当某个成分.而that在同位语从句不充当句子成分. The promise that my uncle gave me made us happy. The promise that my uncle would give me a new bike made us happy. The news that they had won came.

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