摘要:3.“介词+关系代词“是一个普遍使用的结构 (1) “介词+关系代词“可以引导限制性定语从句.也可以引导非限制性定语从句.“介词+关系代词“结构中的介词可以是 in, on, about, from, for, with, to at, of, without 等.关系代词只可用whom或 which,不可用 that . (2) from where为“介词+关系副词“结构.但也可以引导定语从句.例如: We stood at the top of the hill, from where we can see the town.. (3) 像listen to, look at, depend on, pay attention to, take care of等固定短语动词.在定语从句中一般不宜将介词与动词分开.例如: This is the boy whom she has taken care of.

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