定语从句是英语语法中非常重要的一部分，它可以让我们更准确地表达我们要表达的意思。在定语从句中，我们可以使用关系代词（who, whom, whose, which, that）或关系副词（when, where, why）来引导从句。在这篇文章中，我们将会学习到20个经典的定语从句例句，帮助我们更好地掌握定语从句的用法。
- The man who I met yesterday was very friendly.
- The book that I bought last week is very interesting.
- The girl whose bag was stolen called the police.
- The car which was parked outside belongs to my neighbor.
- The house where he was born has been demolished.
- The reason why he resigned is still unknown.
- The teacher whom we respect the most is retiring next year.
- The music which he composed won the award.
- The shop where I bought my dress has closed down.
- The movie that we watched yesterday was really boring.
- The woman whose dog bit me apologized sincerely.
- The job which he applied for requires a lot of experience.
- The restaurant where we had dinner last night was excellent.
- The boy who won the prize is my nephew.
- The project which we have been working on for months is finally finished.
- The company where he works has a good reputation.
- The reason why he failed the exam is because he didn't study hard enough.
- The cat which is sleeping on the sofa is very cute.
- The school where I studied English is in London.
- The doctor whom I saw yesterday gave me some good advice.
以上是20个经典的定语从句例句，它们可以帮助我们更好地理解定语从句的用法。当我们在写作或者交流时，使用定语从句可以使我们的语言更加精准，表达更加清晰。希望这篇文章能够对你的英语学习有所帮助。
