关系代词前带介词的从句有什么区别

He went to theUnited Stateswith one of his best friends from when he was a child.与 the film of which I am speaking is a famous one.有什么区别？

第一句，from 在句中不作成份吗？第二句，of 是 I am speaking of..的 of,按英语习惯表达 of 在关系代词前：of which I am speaking is ...

第一句的 from, 和第二句的 of 在句中的成分，有哪些不同？充当什么成分，有哪些意思？

He went to theUnited Stateswith one of his best friends from when he was a child.与 the film of which I am speaking is a famous one.有什么区别？

第一句，from 在句中不作成份吗？第二句，of 是 I am speaking of..的 of,按英语习惯表达 of 在关系代词前：of which I am speaking is ...

第一句的 from, 和第二句的 of 在句中的成分，有哪些不同？充当什么成分，有哪些意思？

【答】

1. He went to theUnited Stateswith one of his best friends from when he was a child.

从他孩提年代起，他就和一个最好的朋友一块去了美国。

2. The film of which I am speaking is a famous one.

我正在谈到论的那部电影非常有知名度。

这是两个不相同种类型的句子。

句1，when he was a child 是一个名词性从句，作介词from 的宾语（即：宾语从句）。可以理解为：from the time when he was a child，这个时候的when he was a child，才成了time 的定语从句。

句2，of which I am speaking 是一个定语从句，把介词of置于关系代词which之前，放在speaking之后也可：which I am speaking of。