托福语法点睛之which引导的非限制性定语从句

### which 引导的非限制性定语从句 定语从句有限制性和非限制性两种。非限定性定语从句起补充说明作用，在句子中不充当成分，缺少也不会影响全句的理解，它与主句往往用逗号隔开。而限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确。 关系代词which在非限制性定语从句中所指代和修饰的可以是：主句中的名词、形容词、短语、其他从句或整个主句。 ① which指代主句中的名词 e.g.: These apple trees, which I planted three years ago, have not borne any fruit. 翻译：这些苹果树是我三年前栽的，还没有结过果实。 ② which指代主句中的形容词 e.g.: She was very patient towards the children, which her husband seldom was. 翻译：她对孩子们很耐心，她丈夫却很少这样。 ③ which指代主句中的某个从句 e.g.: He said that he had never seen her before, which was not true. 翻译：他说以前从没见过她，这不是真的。 ④ which指代整个主句 e.g.: In the presence of so many people he was little tense, which was understandable. 翻译： 在那么多人面前他有点紧张，这是可以理解的。