非限制性定语从句例句20个如下：
1、Our guide,who was a French Canadian,was an excellent cook.
我们的向导，一个法裔加拿大人，擅长于烹调。
2、Then he met Mary,who invited him to a party.
后来他遇到玛丽，玛丽邀请他去参加晚会。
3、The boy,whose father is an engineer,studies very hard.
这个男孩，他的爸爸是一位工程师，学习很努力。
4、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。
5、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。
6、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。
7、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。
8、LiLingis very clever,which Li Long isn't.
李玲很聪明，李珑可不是。
9、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。
10、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。
11、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。
12、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。
13、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。
14、In Sydney theChineseteam got 28 gold medals,16.5 of which were won by women．
在悉尼奥运会，中国队夺得了28枚金牌，其中16.5枚是女子夺得的。
15、Chinahas thousands of islands,the largest of which is Taiwan．
中国有数千个岛屿，其中最大的是台湾岛。
16、Chaplin went to the states in 1910,by which time he had learnt to dance and act in comedies．
卓别林1910年去了美国，那时他已学会跳舞和演喜剧了。
17、Three of the biggest man-made projects in the world are theGreatWall of China,the Pyramids of Egypt and the Aswan High Dam, which is also in Egypt．
世界上最大的三项人造工程是中国的长城，埃及的金字塔和阿斯旺高坝，它也在埃及。
18、TheNile,which used to flood every year,now runs more regularly below the dam．
尼罗河年年涨洪水，现在比较正常地在大坝下面流过了。
19、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。
20、I still remembered January 10,onwhen he came to see me．
我仍然记得1月10日，那一天他来看我了。