一、在名词从句中连接词 which 有两种词性, 常用来引导宾语从句： 1. [连接代词] 哪个 1〕用作从句的主语，如： He wanted to know which was on the table. 他想知道哪一个在桌子上。 2) 用作从句的宾语，如： He asked me which I liked best. 他问我最喜欢哪一个。 2. [连接形容词]放在名词前作定语，表示“哪个XX，哪些XX〞，如： Do you wnow Which country is the largest? 你知道哪国家一个最大? Could tell me which children made him still more angry. 能告诉我那些孩子使他更加生气了。 二、which 除引导上述宾语从句外，还可以引导主语从句和表语从句。 1. 主语从句(常用形式主语 it) It was clear which children made him still more angry. 显而易见那些孩子使他更加生气了。 It is known to us which he liked best. 众所周知他最喜欢哪一个。 2. 表语从句 That was which children made him still more angry. 那就是那些孩子使他更加生气了。 This is which he liked best. 这就是他最喜欢哪一个。 三、which 与 what 的区别 用在名词从句中，which 意思是“哪一个/那一些〞，what 意思是“所...的〞，后者等于“先行词+关系代词〞，如你的补充问题就需要选择what： It's quite different from what I read last month. = It's quite different from (the one that) I read last month. 这本书与我上周所读过的那一本区别很大。 1.that在所有名词性从句中无成分无意义。 2.which强调哪一个，有一个选择的范围。 从句中from后边缺宾语，所以要选择的是宾语从句的引导词，首先that引导宾语从句时，不做介词宾语〔除了in,except,but) 其次read后边缺宾语，也就是从句中缺成分，参见上面第一条，所以排除that.B选项which指哪一个，这里句意并没有哪个的意思。D选项the one what,应该改成the one that, 这样就是the one作先行词，that引导定语从句，在从句中作宾语。what不引导定语从句。 C选项what引导宾语从句，在从句中作宾语。 本文来源：https://www.wddqw.com/doc/e8fa9103a6e9856a561252d380eb6294dd8822bb.html