定语从句用法。

Question

1、请问这三句定语从句对吗?介词用的对吗?
The house on which we have to concentrate is very competitive.

The house where we have to concentrate is very competitive.
The house where we pay attention is very competitive.

2、定语从句的关系副词where,when使用时从句必须有主谓宾.
但是这句的
We have reached an age where college students expect to drive between classes.
从句的college students是主语 expect是谓语 那宾语是哪个?
是不是不管什么从句只要有主语和谓语expect to 谓语drive 就可以用关系副词?
this is the house where I expect to live.
This is the house where I expect to visit. 这句对吗? 还是This is the house which I expect to visit.
谢谢！！！

Answer 1

1、第一个对的，后面俩感觉别扭
2、宾语是classes
This is the house where I expect to live.=This is the house in which I expect to live.
This is the house where I expect to visit.=This is the house to which I expect to vist.
介词+which= what where when追问

This is the house to which I expect to visit. 这里应该不需要to which吧？直接which

追答

额，是的，visit既有及物动词又有不及物动词，如果是及物动词，是不需要介词的，那就不用to