which引导非限制定语从句的用法：
①指代主句中的各类名词。
eg：These trees，which I planted three years ago，were cut by government.
这些树是我三年前栽的，被政府砍了。
She is an artist，which I am not.
她是一位艺术家，而我不是。
② 指代主句中的形容词。
eg：She was very patient towards the children，which her husband seldom was.
她对孩子们很耐心，她丈夫却很少这样。
③ which指代主句中的某个从句。
eg：He said that he will love her forever，which was not true.
他说他会爱她一辈子，这不是真的。
④ which指代整个主句。
eg：He never has problems in his study, which was admired by his teacher.
他学习上从来没出过问题，他的老师很欣赏这点。
He may have serious stomachache，which makes him keep vomitting.
他可能有严重的胃病，这导致他不停地呕吐。
其他词引导的非限制定语从句
1、who引导
Our guide，who was a French Canadian，was an excellent cook.
我们的向导，一个法裔加拿大人，是一位优秀的厨师。
My gardener，who is very pessimistic，says that there will be no apples this year.
我家的园丁非常悲观，他说今年将不结苹果。
2、whom引导
关系代词whom用于指人，在句中作动词宾语和介词宾语，作介词宾语时，介词可位于句首。
如：Peter, whom you met in London, is now back in Paris.
彼得现在回巴黎了，你在伦敦见过他。
Mr Smith，from whom I have learned a lot，is a famous scientist.
史密斯先生是一位著名的科学家，我从他那儿学了许多东西。
3、whose引导
whose是关系代词who的所有格形式，在从句中作定语。whose通常指人，也可指动物或无生命的事物。
如：Above the trees are the mountains, whose magnificence the river faithfully reflects on the surface.
在树林的高处是山，其壮丽的景色完全映照在河面上。
The play，whose style is rigidly formal，is typical of the period.
这剧本是那个时期的典型作品，风格拘谨刻板。