限制性定语从句和非限制性定语从句在英语中有着不同的作用和形式。以下是它们的例句：

限制性定语从句

例句1：This is the book （which/that） he lost yesterday.

例句2：The book, which he lost yesterday, is very interesting.

例句3：The girl who is wearing a blue necklace is Mary.

例句4：Anyone who leaves litter in the woods will be prosecuted.

例句5：He is the man whose car was stolen.

非限制性定语从句

例句1：This is the house which we bought last month.

例句2：Our guide, who was a French Canadian, was an excellent cook.

例句3：The sun heats the earth, which orbits the sun.

例句4：I’ve invited Jim, who lives in the next flat.

例句5：The play, whose style is rigidly formal, is typical of the period.

区别总结：

作用：

限制性定语从句对被修饰的先行词有限定制约作用，使该词的含义更具体、更明确。如果去掉限制性定语从句，主句的意思往往不完整。

非限制性定语从句对先行词作一些附加说明，不起限定制约作用。即使去掉非限制性定语从句，主句的意义仍然完整。

形式：

限制性定语从句与先行词之间没有逗号隔开。

非限制性定语从句与先行词之间通常用逗号隔开。

通过这些例句和区别，可以更好地理解限制性定语从句和非限制性定语从句在句子中的不同用法和形式。