定语从句中的介词提前和as的用法

Question

比如说那些in which，of which的，还有定语从句什么时候用as
最好能说一下用法语法，举个例句分析，谢谢了

Answer 1

关系代词whom或which在定语从句中作介词宾语时,介词可放在后面,也可提前构成介词+关系代词whom (先行词指人)/which(先行词指物)引导定语从句(这种方法更为正式)。例:

Mary is the girl whom I borrowed a book from. = Mary is the girl from whom I borrowed a book. 玛丽就是我向她借书的那个女孩。

Is this the room that/which he once lived in? = Is this the room in which he once lived? 这是他曾经住过的房子吗?

常见的有以下几种情况:

1. where=in/on which 例:

This is the room where / in which he lives.这是他住的房间。

I can see the playground where / on which they do sports.我能看见他们进行运动的操场。

2. when= on/in/at which 例:

I still remember the year when/ in which I joined the Party.我仍然记得入党的那一年。

I still remember the day when/on which I joined the Party. 我仍然记得入党的那一天。

I still remember the hour when/at which the rocket was launched.我仍然记得那个火箭发射的时刻。

3. why=for which 例:

This is the reason why / for which he was killed.这是他被杀害的原因。

但下列情况下介词不能提前:

⑴用who代替whom,用that代替which时,介词不能提前。例:

He's the boy who I learned English from.这是我向他学英语的男孩。

This should be the place that Tom sent the parcel to. 这应是汤姆送包裹的地方。

⑵当whom、which省去时介词不能提前。例:

Is he the boy you went there with?他是和你一起去那儿的男孩吗?

This is the room he lived in. 这是他住过的房间。

⑶当whom, which作为含有介词的动词短语的宾语时,介词一般来说不能拆开提前。例:

You're the very man whom I'm looking for. 你正是我在找的那个人。

This is the program which he listened to. 这就是他听过的节目。

再看下面几种结构

Answer 2

as引导定语从句，既可放在句中，又可放于句首

Answer 3

找读书的高手就可以了！！！OK？

Answer 4

我正要看