英语by which怎么引导定语从句？

Question

如题所述

Answer 1

by which 可以引导定语从句

She had never had a real boyfriend before and so had no yardstick by which to compare Charles's behaviour

她以前从没有过真正的男朋友，所以没有可参照的标准来对比查尔斯的行为。这里“by which” 明显是“介词+关系代词”引导的定语从句。

by which在从句中充当状语，表方式。which指代的是the reactions，而不是指“Enzymes”
即: synthetic organic substance are degraded in the body by the reactions.
句子大意：
酶被 (持怀疑态度的) 认为有助于甚至引起（生化）反应；通过这些（生化）反应，合成有机物质在体内而分解。

Answer 2

which引导定语从句，而不是by which，by是紧跟着从句中的动词的，比如by which we live

Answer 3

by which用法：为相关介词加关系代词的用法，定语在定语从句中要充当宾语的成分。之所以用by which，是因为定语在定语从句中要充当宾语的成分。本回答被网友采纳

Answer 4

给你写几个例子就懂了

①　Air is the Earth's precious natural resource, by which we breathe and live.

空气是地球宝贵的自然资源，通过它(指水)我们呼吸和生存。

➁　Genes are attributes that humans are born with, by which deviding human into different parts.

基因是人类天生的属性，通过它(指基因)把人类分为不同部分。

Answer 5

by which 整天做后面从句的状语，which 做先行词，a bus by which tomorrow get to London.