同位语从句详解答:1.定语从句的先行词是名词或代词;而同位语从句的先行词只能是名词,而且仅限于idea,plan,fact,theory,promise,hope,news,doubt,truth,information,suggestion,question,thought,belief,conclusion等少数名词。 例如: ①The boy who is playing football is my classmate. ②Those who work hard will succeed. ③The fa...