分析:本句包含which引导的　　　,修饰　　　和who引导的　　　,修饰　　　。

　　【观察思考】

　　(1)The mayor presented the prizes to the winners in person.= The mayor presented the winners with the prizes in person.

　　市长亲自为胜出者颁奖。

　　(2)The book was a present from my elder brother.

　　这本书是哥哥送给我的礼物。

　　(3)Were you present at the meeting when the news was announced?

　　宣布那消息时你在会议现场吗?

　　(4)After being taken back 200 years,we were suddenly returned to the present day.

　　我们刚才还处在200年前的情景中,一下子又回到了现在。

　　(5)Im afraid I cant help you at present.I am too busy.

　　很抱歉现在帮不了你,我太忙了。

　　　　【归纳总结】

　　(1)present作动词,短语"把某物赠予或交给某人"　　　　　=　　　　　

　　(2)present作名词,意为　　　　

　　(3)present作形容词,意为　　　　　,常用短语　　　　　

　　(4)present作形容词,意为　　　　

　　(5)at present 短语,意为　　　　

　　2.John was studying in his room when he heard screaming.

约翰正在他的房间里学习,这时他听到了尖叫声。