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人教2003课标版《Using LanguageⅠ》公开课PPT课件优质课下载
3. Do you still remember the place where we met Tom.
4. There are many reasons why people like travelling.
比较下面两个句子：
1. I have a sister who works in a hospital. 我有一位在医院工作的姐姐。
2.I have a sister, who works in a hospital .
我有一位姐姐，她在医院工作。
不止一位姐姐（从句修饰先行词）
只有一位姐姐（从句对先行词作附加说明）
从句不可缺少，否则主句意义不完整。
即使去掉从句，主句的意思仍完整。
非限制性定语从句和主句的关系不十分密切，只是对先行词作些附加说明，如果去掉，主句的意思仍然清楚。这种从句和主句之间往往用逗号隔开。
Examples:
1.His mother , who loves him very much, is strict with him.
（先行词为his mother , who在从句中作主语 ）
2. The sun, which rises in the east , gives us heat and light.
（先行词为the sun, which在从句中作主语，不能用that替代。 ）
Examples:
3. Cathy, whom you met in London, is now back in China.
（先行词为Cathy, whom在从句中作宾语 ，不能用who替换且不能省略）
4.I have told my friend the reason ,for which I didn’t attend her party.
（先行词为the reason, for which在从句中作状语 ，不能用why替换）
Examples:
5.John passed the exam , which made his parents very happy.
(which在从句中作主语,指代整个主句的内容）
6. After graduation , I decided to stay in Shanghai, where I was born.