关于英语定语从句的问题,He noticed a remains of a snake which had been dropped by a bird onto the wires.和 He noticed a remains of a snake which a bird had dropped onto the wires这两个句子有错误吗?一个是被动式一个是主动对吗?差别除了主动被动就没有了是吗?定语从句,先行词是宾语的时候,which,who,that后面可以直接跟动词就像第一个句子,也可以后面跟主词对吗?看要表达的意思,后面跟主词还是动词,第一句如果改成He noticed a remains of a snake which had been dropped onto the wires by a bird还对吗?如果不对,为什么呢?

两个句子都对，第一个定语从句是被动，第二个定语从句是主动
先行词是宾语的时候，which,who,that后面可以直接跟动词就像第一个句子，例如
I don't know the man that you talked about.
第一句如果改成He noticed a remains of a snake which had been dropped onto the wires by a bird 也对

这几个句子都对的，因为前面的先行词是a remains of a snake,所以which 相当于这个，在你的第一个句子中，which也就是指代的a remains of a snake,在句中做了后句的主语，
第二个句子，which做了后一句的宾语，应该在dropped之后，可以这么理解
最后一个你改成的这个也对，

这两个句子没有错误。
一个是被动语态一个是主动语态。没有其他区别。
He noticed a remains of a snake （先行词）which （从句的主语） had been dropped（从句的谓语） by a bird onto the wires.
He noticed a remains of a snake （先行词）which （从句的宾语，逻辑上位于dropped之后）a bird （从句主语）had dropped onto the wires。
定语从句，先行词属于主句，不可能作从句的宾语。which,who,that后面可以直接跟动词，本身当从句的主语。最终都要根据从句的句子成分顺序决定。

先行词是主语时，后面直接加谓语动词。
先行词是宾语时，后面加主语+谓语
He noticed a remains of a snake which had been dropped onto the wires by a bird是对的。

两个句子都对,区别仅仅是一个主动一个被动. 定语从句,先行词是宾语的时候,which,who,that后面可以直接跟动词就像第一个句子,对的. 也可以后面跟主词. 第一句如果改成He noticed a remains of a snake which had been...