1. This is the gentleman who helped me out of the trouble. 2. The building which stands near the river is our school. 3. Do you know the boy whose bicycle was broken just now? 4. The farm (that)we visited last Sunday was located in the suburbs of Beijing.定语从句：修饰名词或代词对其启到限定作用 的句子。被定语从句修饰的名词或代词叫先行 词。引导定语从句的词叫关系代词以及关系副 词（when/ where/ why) 指代对 象 人 事物 人物共 存 主格 Who/ that That/ which that 宾 格 Who(m)/that That/which that 所有 whose Whose/of which1. The boy _ we saw yesterday was Johns brother. 2. Do you k
