定语从句作为英语语法中的重要部分，被广泛使用。下面是20个常见的定语从句的例句，希望对大家学习英语有所帮助。
- The book {that I bought yesterday} is very interesting.（我昨天买的那本书非常有趣。）
- The lady {who is standing over there} is my neighbor.（那位站在那边的女士是我的邻居。）
- The school {which I attended} is very famous.（我毕业的那所学校非常有名。）
- The boy {whose mother is a teacher} is very smart.（那个母亲是一名老师的男孩非常聪明。）
- The cake {that I made} is delicious.（我做的那个蛋糕很好吃。）
- The movie {which we saw last night} was very exciting.（我们昨晚看的那部电影非常精彩。）
- The car {whose owner is my friend} is very expensive.（那辆车的主人是我的朋友，非常昂贵。）
- The man {who is wearing a hat} is my boss.（那个戴着帽子的男人是我的老板。）
- The dress {that she is wearing} is very beautiful.（她穿的那件裙子非常漂亮。）
- The book {which is on the table} is mine.（桌子上那本书是我的。）
- The girl {who is singing} has a beautiful voice.（那个在唱歌的女孩有一副美妙的嗓音。）
- The dog {whose tail is wagging} is very friendly.（那只摇尾巴的狗非常友好。）
- The bicycle {that I ride to work} is very old.（我骑去上班的那辆自行车非常旧。）
- The hotel {which we stayed in} was very comfortable.（我们住的那家酒店非常舒适。）
- The picture {that is hanging on the wall} is very beautiful.（挂在墙上的那张图片非常漂亮。）
- The girl {who is sitting next to me} is my sister.（坐在我旁边的女孩是我妹妹。）
- The pen {that I am using} is running out of ink.（我正在用的那支笔已经没墨水了。）
- The boy {whose father is a doctor} is very healthy.（那个父亲是医生的男孩非常健康。）
- The house {which is across the street} is for sale.（街对面那个房子在出售。）
- The woman {who is holding a baby} is my cousin.（那个抱着婴儿的女人是我的表妹。）
定语从句可以帮助我们更准确地描述人或物，使我们的句子更加生动、丰富。希望大家在学习英语的过程中能够灵活运用定语从句，写出更加优美的句子。
