第1个回答 2022-10-31
why和which可以引导名词性从句以及定语从句，区别如下：莱垍头条
1. 引导名词性从句的区别，why在名词性从句中作原因状语，意思是“为什么，…的原因”，which在名词性从句中作定语，例如：莱垍头条
1）He didn't say why he couldn't come.头条莱垍
他没说他不能来的原因 / 他没说他为什么不能来莱垍头条
2) Could you tell me which subject is your favourite, maths, physics, or English?(which在从句中作subject的定语)莱垍头条
2. why和which引导定语从句的区别， why引导定语从句时，叫作“关系副词”，代替先行词在从句中作状语，表示原因，一般修饰先行词reason(即：why引导的定语从句一般放在reason后面)，并且不可以省略，例如：头条莱垍
The reason why he was absent today was that he was ill.他今天没来的原因是他病了（he was absent for the reason）条莱垍头
which 在定语从句中作主语或宾语，作宾语时可以省略，例如：垍头条莱
1) This is the museum which we visited last month.（which在从句中代替museum作visited的宾语，可以省略—— We visited the museum last month. ）头条莱垍
2) A plane is a machine which can fly.(which 代替先行词a machine, 在从句中作can的主语)条莱垍头