Unit 1 Laugh out loud Period 2 Using language 知识点梳理-2020-2021学年高二上学期英语期末考点大串讲（新教材外研版选择性必修第一册）

Unit 1 Lough out loud! Period 2  Using language 知识点梳理 单元语法精讲精练－非限制性定语从句 I.语法感知 感知以下课文原句，补全方框下的小题 1．I walk through the doors into the waiting area，where there’s a familiar atmosphere of boredom and tension. 2．People sit uncomfortably on plastic chairs，looking through old magazines，all of which have been read hundreds of times previously. 3．I speak with the on-duty nurse，who tells me that Lara’s parents rushed her to the hospital after she fell off her bicycle. 4．Scientific studies show that laughter produces chemicals to make people feel better，which means clown doctors can be helpful. 非限制性定语从句是对主句中的先行词起补充说明作用的定语从句。其标志是主句和从句之间用逗号隔开。句1中where引导非限制性定语从句，修饰上文的the waiting area； 句2中用了“不定代词＋of＋which”引导非限制性定语从句； 句3中who引导非限制性定语从句，修饰上文的nurse； 句4中which引导非限制性定语从句，指代前面整个主句。 II.语法精析 非限制性定语从句 与限制性定语从句相比较，非限制性定语从句是指与主句关系不十分密切，只对主句中的先行词起补充说明作用的定语从句。其标志是主句和从句之间用逗号隔开。 1．引导非限制性定语从句的关系代词指人时用who，whom或whose；指物时用which或whose。 This is our headmaster，who I think has something important to tell you. 这是我们的校长，我认为