She paid the man from whom she had borrowed some money . ( = She paid the man . She had borrowed some money from him . )（注意：borrow sth . from sb . 这一搭配关系）
In the dark street , there wasn\'t a single person to whom she could turn for help (NMET 92)（注意：turn to sb . for help 这一搭配关系）
⒉ 看介词与定语从句的先行词是否有搭配关系。如：
The dog died because there was no way in which it could be brought back to the earth .
此句相当于：The dog died . There was no way it could be brought back to earth . （注意：in the way , in this / that way 这一搭配关系）又如：
He will never forget the day on which he joined the Party .（介词 on 与先行词 day 的搭配关系）
⒊ 看介词与定语从句中的形容词是否有搭配关系。如：
China is a large country with a long history of which we are greatly proud .（注意：be / feel proud of 这一习惯搭配）
The two things of which they felt very proud were Jim\'s gold watch and Della\'s hair .（1998年上海高考试题）
⒋ 若表示“所有关系”或“整体中的一部分”，则用介词 of 。如：
I live in this room , the window of which faces south . ( = I live in this room , whose window faces south . )（表示“所有关系”）
There are over 3,000 workers in that factory , eighty-five percent of whom are women . ( =There are … , and eighty-five percent of them are women . 表示“整体中的一部分”）
China has hundreds of islands , the largest of which is Taiwan . （表示“整体中的一部分”）
● 定语从句的关联词活用例析
定语从句是中学英语课本中比较复杂的一个语法项目，有些学生对怎样选择关联词不甚清楚，有时会出现错误。现略举几例加以分析说明。先比较下面例句。
1 . I\'ll never forget the summer holidays (which / that) I spent on the seashore .
我决不会忘记在海滨度过的那个暑假。
2 . I\'ll never forget the summer holidays when I worked by the seaside .
我决不会忘记在海边工作的那个暑假。
3 . He is going to work on the island which / that needs him most .
他打算到最需要他的那座岛上去工作。
4 . He is going to work on the island where he is most needed .
他打算到那座岛上去工作，那里最需要他。
分析：在例1句子中，关联词 which / that 在从句中作及动动词 spent 的宾语，可省略；在例2句中，关联词 when 在从句中作时间状语；在例3中，关联词 which\'that 在从句中作主语，不能省略；在例4句子中，关联词 where 在从句中作地点状语。
结论：定语从句的重点是如何选择关联词(关系代词或关系副词)。若关联词在从句中作状语，就应使用关系副词；否则就应使用关系代记号。关系副词 when , where , why 的使用，并不决定于其先行词是表时间、地点或原因的词，而是取决于关联词在从句中充当哪种语法成分。只有当关联词在从句中作时间、地点或原因状语时，才能分别使用关系副词 when , where , why 或者用 in / at / on which 代替 when , 用 in / at which 代替 where , 用 for which 代替 why；若关联词在从句中作主语、宾语，则应用关系代词 which 或 that。
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高一英语第八单元Food Around The World (世界上的食物)