关于高一英语定语从句的问题作业里要求下列的句子以定语从句的形式并成一句.可我看下来,好像全都是用that/which……

把两句话合成一句话,主要就是找到两句话中同时出现的名词,分清这个名词是指人还是指物I,然后选择相对应的关系词两句话连接起来,主从放在前面,从句放在连词后面；主句中出现过的名词或代词在从句中不能出现.如第一句话中a new school是前后两句话都出现过的指物的名词,所以选which来连接连个句子,而且it在主句中已经出现,所以在从句中就不能出现it了；
I am attending a new school,which is very large.
It has many student,who are from different countries.
We study Maths,English,Pysics and many other subjects,of which i like english best.
An American lady teacher teaches us English,who i admire most.
I also like our History teahcer very much,who is good at telling stories,whcih are very interesting.
I have a good friend whose name is Sally.We often go to the library together,which is a quiet and comfortabe place.
定语从句前必定有一个关系词,这个关系词的作用一是连接主句和从句,而是用来代词先行词的；如果关系词在从句中作主语,那么这个关系词是万万不能省略的,如上面这些句中的who/和一些which是不能省的；但如果关系词在从句中是作宾语的,那么一般情况下就可以省略了,不仅仅是that,who/which用法也是如此.如：
I don't know the man（who/whom/that) you spoke of just now.本句话中关系词在从句中作of的宾语,所以可以省略.当然加上也可以的.希望对你有所帮助.