Period Ⅱ Using language——Grammar & Vocabulary Grammar(定语从句 3)课前自主预习[观察句子，总结规律]①These terraces were built by the local Zhuang and Yao people, to whom Guangxi is home.②But perhaps what is most significant is the way in which people have worked in harmony with nature to make these terraces and grow rice.③This forms clouds from which rain falls down onto the mountain terraces once again.④These terraces also provide a perfect environment for birds and fish, some of which feed on insects that can harm the rice crops.⑤Although modern technology could help produce more crops, the rice growers are people for whom traditions hold much value.[我的发现]通过观察可知：(1)句①⑤中，定语从句由 加关系代词 引导，一般先行词为表示 的名词。(2)句②③④中，定语从句由 加关系代词 引导，一般先行词为表示 的名词。答案：(1)介词； whom; 人 (2)介词； which; 物精讲课时语法1.“介词＋关系代词”结构中的关系代词“介词＋关系代词”是一个普遍使用的结构。“介词＋关系代词”结构中的关系代词只可用 whom 或 which，不可用 that。Do you remember the day on which you joined our club?还记得你加入我们俱乐部的那一天吗？In the dark street, there wasn't a single person to whom she could turn for help.在漆黑的大街上没有一个人可以让她求助的。2．“介词＋关系代词”结构中介词的确定1介词的选择可以总结为：“一先、二动、三意义、四特殊”。(1)一先，即先看先行词，从先行词入手。介词往往和先行词构成固定搭配。(比如时间常和 on, in, by 搭配；地点常用 on, in, at；原因用 for；方式用 in, by, with 等)This is the house in which the inventor lived.这就是那位发明家住的房子。(2)二动，即看从句中的谓语动词结构。根据从句中谓语动词的搭配选择合适的介词。He is a person of whom everyone has heard.(hear of 听说)他是一个人人都听说过的人。(3)三意义：通过判断主句表达的全部意义来确定合适的介词。He was educated at the local high school, after which h...
