Question

定语从句中的“介词+which”的介词到底该怎样选择啊

谁能帮帮我，我不会定语从句
那有谁知道定语从句中that和where的区别，我做题时总是不太会，谁教我怎样理解

Answer 1

that和where都可以充当定语从句的引导词。引导词的作用记清楚：1. 引导定语从句（放在定语从句句首）2. 连接定语从句和被修饰词（定语从句就是用来修饰名词或代词的句子。比如说beautiful girl. beautiful就是gril的定语，而定语从句不过是用从句做定语罢了） 3. 指代先行词（也就是被修饰的名词），在从句中充当成分。
好好看看我举的例子。把这两个简单句合成一个含有定语从句的复合句。
I visited the factory yesterday.My father worked in the factory.
组合后是：I visited the factory (that/which my father worked in） yesterday.括号里的就是一个定语从句了。
这个从句修饰的是factory，所以factory就是先行词（被修饰的词）；从句的引导词就是that/which, 因为在从句中充当宾语，并且先行词又指物，才这样用。that/which实际上就是指代了factory.
其实这个句子还有另一种写法：I visited the factory (where my father worked) yesterday. 本句不同之处在于，where指代的不只是factory这个词了，而是in the factory这个地点状语，这就是为什么会用where的原因了。

句子的第三种写法就是 I visited the factory (in which my father worked) yesterday.实际上这个in which 就等价于where。根据我的解释，第一个句子中which指代了factory, 第二个句子中where指代了in the factory，那么也就可以等于in + which啊。所以which 前的介词并没有规律，而要看他本身指代的先行词到底是个什么样的地点。用一个恰当的介词去和它配合。例如我举的例子先行词是factory, 和它搭配的介词当然是in 啦。

定语从句引导词的选择不外乎两个条件：1. 先行词（指人还指物？是不是不定代词？前面有没有一些例如形容词最高级的特殊限定词？） 2. 在从句中充当的成分。其中that, which, who在从句中可充当主语或宾语；whom只能在从句中充当宾语；whose比较特殊，在从句中充当定语，表示“……人/物的”；where, when, why在从句中分别充当地点，时间和原因状语。

Answer 2

介词+which”的介词的选用要考虑3个方面，
1，考虑先行词与介词的固定搭配。
This is the farm on which he is working . on the farm 是固定搭配。
2，考虑句意的需要。
This is a factory into which he wants to go . go into the factory .
He is one of my friends with whom i am living . live with sb .
3, 考虑 定语从句谓语动词的固定短语所需什么介词。
This is a book in which i am interested . be interested in sth .

Answer 3

看which后的动词，一般是与后面的动词构成短语。

Answer 4

1.在介词+which引导的定语从句中的介词选用没有固定规律，要从上下文及句子要表达的内容来判定。如:
1)The book from which we learned a lot was bought in a small bookshop.
2)The bookwas bought in a small bookshop.
3)The book near which there is a cup was bought in a small bookshop.
4)The book on which there is a pen was bought in a small bookshop.
处理这类问题，把定语从句独立出来是应该掌握的技能，也是技巧。以上四句的定语从句独立出来是：
1）We learned a lot from the book.
2)There are many interesting pictures in the book.
3)There is a cup near the book.
4)There is a prn on the book.
2.关系代词that（有时也用作关系副词）与关系副词where的区别
1）关系代词that在定语从句中有三个功能：引导功能，成分功能和替代功能，如：
（1）The factory that he works in is not far from his home.
例句中关系代词that引导定语从句，并替代先行词the factory在定语从句中作works in的宾语。这个句子还可以表达成：
（2）The factory in which he works is not far from his home.
关系代词不可以作介词宾语，要改作which.例句（2）还可以该做：
（3）The factory whrere he works is not far from his home.
2) 从（2）（3）两个例句，很容易看到关系副词where=in which.就是说，“关系副词”等同于“介词+关系代词”。
3）当关系副词的先行词是place,time,reason和way这几个不易造成含义混淆的词时，关系副词where，when,why,that可以省略。先行名词是表示方法的名词，其后的定语从句不可以用how引导，应该做that,这时的that作关系副词。