定语从句讲解，习题PPT

一、定语从句的概念定语从句是修饰名词或代词的从句，用来说明、限定被修饰词的性质、特征、身份等。定语从句通常由关系代词（who，whom，whose，whi...

一、定语从句的概念定语从句是修饰名词或代词的从句，用来说明、限定被修饰词的性质、特征、身份等。定语从句通常由关系代词（who，whom，whose，which，that）或关系副词（where，when，why）引导。二、定语从句的引导词关系代词Who：指人，在从句中作主语Whom：指人，在从句中作宾语Whose：指人或物，在从句中作定语Which：指物，在从句中作主语或宾语That：指人或物，在从句中作主语或宾语关系副词Where：指地点，在从句中作状语When：指时间，在从句中作状语Why：指原因，在从句中作状语三、定语从句的用法限制性定语从句例句：The boy who is reading a book is my friend.（正在读书的男孩是我的朋友。）非限制性定语从句例句：My friend, who is a doctor, helped me a lot.（我的朋友，他是医生，帮了我很多。）四、定语从句的位置定语从句可以放在被修饰词的前面或后面。前置定语从句例句：The book that I bought yesterday is very interesting.（我昨天买的书非常有趣。）后置定语从句例句：My house, which is near the river, has a beautiful view.（我的房子，靠近河边，风景优美。）五、定语从句的练习题请填入正确的关系代词或关系副词。The girl _______ mother is a teacher.（她的母亲是一名老师。）This is the house _______ I was born.（这是我出生的房子。）The film, _______ we watched yesterday, was very exciting.（我们昨天看的电影非常刺激。）请将下列句子中的定语从句划出，并标明关系词的类型。The dog that is barking is very annoying.（限制性定语从句）My friend, who is a doctor, helped me a lot.（非限制性定语从句）The book which I borrowed from the library is very interesting.（限制性定语从句）请将下列句子中的定语从句改写为非限制性定语从句。The car that John bought last week is very expensive.The girl who won the competition is my sister.答案：The car, which John bought last week, is very expensive.The girl, who won the competition, is my sister.六、总结通过以上的讲解和习题的练习，希望大家对定语从句有了更清晰的理解。定语从句在提供额外信息或对名词进行限定时起到了重要作用，需要掌握好定语从句的引导词和位置，以及限制性和非限制性定语从句的用法区别。多做练习，加深对定语从句的理解和运用。