什么是非限制性定语从句?只能用which么?

什么是非限制性定语从句?只能用which么?
什么是非限制性定语从句?只能用which么?

什么是非限制性定语从句?只能用which么?
1）定语从句有限制性和非限制性两种.限制性定语从句是先行词不可缺少的部分,去掉它主句意思往往不明确；非限制性定语从句是先行词的附加说明,去掉了也不会影响主句的意思,它与主句之间通常用逗号分开.例如：
This is the house which we bought last month. 这是我们上个月买的那幢房子.（限制性）
The house, which we bought last month, is very nice.这幢房子很漂亮,是我们上个月买的.（非限制性）
2） 当先行词是专有名词或物主代词和指示代词所修饰时,其后的定语从句通常是非限制性的.例如：
Charles Smith, who was my former teacher, retired last year. 查理·史密斯去年退休了,他曾经是我的老师.
My house, which I bought last year, has got a lovely garden. 我去年买的的那幢房子带着个漂亮的花园.
This novel, which I have read three times, is very touching. 这本小说很动人,我已经读了三遍.
3） 非限制性定语从句还能将整个主句作为先行词, 对其进行修饰, 这时从句谓语动词要用第三人称单数.例如：
He seems not to have grasped what I meant, which greatly upsets me. 他似乎没抓住我的意思,这使我心烦.
Liquid water changes to vapor, which is called evaporation. 液态水变为蒸汽,这就叫做蒸发.
说明：关系代词that和关系副词why不能引导非限制性定语从句.
自己见定语从句的格式+从句前后用逗号隔开=非限制性定语从句(又叫非限定性定语从句）
删去此句后对原句不会产生意思上的影响.
还可以用when,where,as
应该比较清楚,还有问题的话给我留言吧!

which引导非限制性定语从句的情况很多，经常修饰限定前面的句子。
比如：
1．Dick is going to join in the football game，which was agreed at the meeting．
2．My brother had been an engineer，which was what he wanted to be．

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which引导非限制性定语从句的情况很多，经常修饰限定前面的句子。
比如：
1．Dick is going to join in the football game，which was agreed at the meeting．
2．My brother had been an engineer，which was what he wanted to be．
when，where引导非限制性定语从句时，作定语从句的状语。
when ＝and then，
where ＝and there。
1．He was quickly taken to hospital，where a doctor wanted to examine Mr King's legs．金先生很快被送去住院，在那里一个医生要检查他的腿。
2．We will put off the outing until next week，when we won't be so busy．我们把郊游推迟到下个星期，那时我们不会那么忙了。
3．He went to America in 1912，where and when he was noticed by an important film director．他在1912年去了美国，当时他在那里引起了一个重要电影导演的注意。
在介词 + where ／when 非限制性定语从句里，where ＝there，when ＝then。
4．His head soon appeared out of the second storey windows，from where he could see nothing but trees．他的头很快从第二层楼的一个窗户伸出来了，从那里他只能看见树木。
5．That was in 1929，since when things have been better．那是在1929年，从那时起情况就已经好转了。
6．I went to bed at ten，before when I was reading for an hour．我10点去睡觉，在那时以前我看了1小时的书。
有时候where ／when可以用prep．which替换。
7．The southern states wanted to set up a country of their own，where they would be free to keep black slaves．南方各州要建立一个属于他们自己的国家，在那里他们将自由地保留黑人奴隶。
8．I still remembered January 10，on which ／when he came to see me．我仍然记得1月10日，那一天他来看我了。
你的补充问题，上面已经说明了呀，
when，where引导非限制性定语从句时，作定语从句的状语。
因此你只要看到非限制性定语从句中强调的是时间或者地点，那就可以用when和where了啊
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除了which外，，还有when,where
其中when,where都能换成 介词+which

不是只能用 which反正不能用that

简单说 有逗号的。