关系代词：which
Which 在从句中作主语或者宾语：
指物： The bus which has just left was the last one today.（做主语） The fish (which ) I bought this morning were not fresh.(作宾语)
Unit 4 Natural Disaster
Live to tell, Raising awareness Reducing mortality.
用生命呼吁：增强减灾意识，减少人员伤亡。
限制性定语从句：
概念： 在复合句中，修饰名词或者代词的从句叫作定语从句。
定语从句的引导词：
关系代词：that ， which， who , whom. whose 关系副词:where, when , why
关系代词：That
That 在从句中作主语或宾语：
指物：
This is a book that interests a large number of people.(做主语) Is there anything that I can do for you?(作宾语)
指人：
He that would eat the fruit must climb the tree.(作主语) He is a man (that ) you can safely trust.(作宾语)
先行词： 被定语从句修饰的词叫作先行词。
例句：
1. The man who lives next to us is a police officer. 住我们隔壁的那位男士是一位警官。
2. A drone is an aircraft without a pilot that is operated by remote control. 无人机是一种无飞行员，被遥控操作的飞机。
小结填空：
关系代词which， that ， who在定语从句 中可以作__________，也可以作__________； 关系 代词whose在定语从句中作_________________.
答案： 主语 宾语，定语
（二）关系副词：when where why
定语从句可以有关系副词when ,where, why 等 词语引导，关系副词在句中作状语。
特别提示：
关系代词 that ， which， who， （宾格 whom）在从句中做宾语时Байду номын сангаас 特别是在口语或 者非正式的书面表达中，常常省略。
关系代词：whose
关系代词whose 引导的定语从句先行词既可以是人，也可以 是物。 Whose 在从句中作定语。 如：
She is the girl whose brother is studying abroad. The room whose window faces south is mine. I talked with the man whose house was destroyed in the flood. He has written a book whose name I’ve forgotten.
3. We will start at the point where we left off last time. 我们从上次结束的地方开始吧。
先行词是：____________________________ 定语从句是：____________________________
（一）关系代词的用法讲解及练习： that ，which ，whom ，who
当when ,where引导定语从句时，其对应的先行 词分别表示时间的名词和表示是地点的名词。
When 在从句中作时间状语
Where 在从句中作地点状语
Why 在从句中作原因状语：
1. that’s the reason why (=for which) he missed his bus.
关系代词： who whom
Who， whom在从句中分别做主语或宾语： 指人：
The expert who visited our class yesterday is from Canada.(做主语) Is he the boy who always wins math's competitions?（做主语） The one (0） we are talking about is a scientist.(作宾语) This is the teacher to whom I referred.(做宾语)