在定语从句中，若从句中有被动语态,该如何分析句子成份？

A.
首先分析句子成分。
主语：That。系动词：is。表语：the writer。"by whom a lot of books were written"定语从句芦信修饰the writer。野哗槐
这里的by whom 就是介词提前。相颂友当于“whom a lot of books were written by”,由于在从句中做writeen by的宾语，故用宾格whom。
如有不懂可追问。

首先，这个句子的主干部分已经完整，就是that is the writer，后半部分整个都是就是writer的定语。
后面books were written中，可以看出用来被动语态，而books在从句简简塌中做主语，恢复成正常语序就咐答是books were wrtten by the writer,writer是这句话的逻辑主语（拦圆book的施动者）

选A；就这句话That is the writer by whom a lot of books were written.来分析。
1） 主干是That is the writter.
2） by 后面引导的是定语哗明从句，用来修饰先行词writter;
3） whom 指“writter”, 在从句中森芦樱本应该为“written by whom”, 但“whom”是关系代词要放在句首。by 和此丛whom 的关系比 written紧密, 所以要跟着“whom”走。

选芹瞎早A
这种句子嫌雀一般看神清搭配written by
可以还原句子a lot of books were written by sb
因此选by whom

A 因为 write与by连用，by为介词，要用who的宾格whom