Question

Which引导的定语从句在从句当中作什么成分？

You must see to it that you pull up regularly all the baobabs, at the very first moment when they can be distinguished from the rosebushes which they resemble so closely in their earliest youth.此为原文摘自小王子。请问1.which在这里引导的是什么从句 2.如果是定语从句的话 那么他代替的是哪个先行词又在从句当中作什么成分？

Answer 1

主语或宾语

Answer 2

which 在定语从句中可以作主语，宾语。可以引导限制性定语从句，非限制性定语从句。
例如：
A plane is a machine 【which主语 】can fly.
The book 【which 宾语】he gave me yesterday is wonderful!
The game ended on a tie,【which 非限制性定语从句，作主语】 was beyond their expectation.
祝你开心如意！

追问

请问 在这句话中 which怎么用的？