Unit 5 Travelling abroad Section Ⅲ Grammar——复习非限制性定语从句[思维导图][语法精讲]一、概述定语从句分为限制性定语从句和非限制性定语从句两种。非限制性定语从句是指对先行词进行附加说明的从句，去掉了它也不会影响主句的意思。它与主句之间通常用逗号分开。Our guide, who was a French Canadian, was an excellent cook.我们的向导，一个法裔加拿大人，擅长于烹调。Li Ming was always late for school, which made his teacher annoyed.李明上学经常迟到，这一点令他的老师很生气。二、限制性定语从句与非限制性定语从句的区别项目限制性定语从句非限制性定语从句作用对先行词起限定修饰作用，不可省略对先行词或主句起补充说明作用，可以省略结构无逗号与主句隔开有逗号与主句隔开引导词可以用 that, why 等不可以用 that, why译法译成定语译成解释语试比较：The boy whose father is an engineer studies very hard.那位父亲是位工程师的小男孩学习很努力。(限制性定语从句)The boy, whose father is an engineer, studies very hard.那位小男孩学习很努力，他的父亲是位工程师。(非限制性定语从句)三、注意事项1．that 和 why 不能引导非限制性定语从句。①She received an invitation from her boss, which came as a surprise.(正确表达)她收到了老板的邀请，这是她意想不到的。She received an invitation from her boss, that came as a surprise.(错误表达)② 他失去工作的主要原因是他喝酒。The main reason why he lost his job was that he drank.(正确表达)The main reason, why he lost his job, was that he drank.(错误表达)2．as 引导的非限制性定语从句(1)as 引导的非限制性定语从句常用在一些固定搭配中。如：as we all know 众所周知；as is often the case 情况经常如此；as is said above 如上所述；as has been said before 正如之前所说，等等。Yi Jianlian and Yao Ming, as we all know, are both excellent basketball players.众所周知，易建联和姚明都是优秀的篮球运动员。As is said above, he has conquered the difficulty.正如上面所说，他征服了困难。(2)as 引 导 的 非 限 制 性 定 语 从 句 还 常 与 the same, such 等 构 ...
