慢速英语:Everyday Grammar: Relative Pronouns

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短语讲解：

1. A relative pronoun relates to the noun it is describing.

relate to 涉及; 同…有…关系
例句：How do these relate to the product being designed?
这些经历同将要设计的产品有什么关系？

2. If the clause begins with the relative pronoun who, you need commas if the clause is adding additional information about the noun.

begin with 以…开始， 从…开始
例句：The proceedings will begin with a speech to welcome the guests.
大会议程首先 是向来宾致欢迎辞.

3. The clause “who lives in New York” is identifying which sister he or she is talking about.

talk about 讨论，谈论
例句：He went on to talk about his accident.
他接着谈到了他的意外事故。