定 语 从 句 是由关 系 代 词 或 关 系 副 词 引导的 从句 ， 关 系代 词 有 that, which, who, whom, whose 等，绝对没有 WHAT ； 关系副词 有 where, when, why 等。 The girl whose name is Lisa is a teacher in TEFL. 先行词 定语从句（其中 wh
一：关系代词引导的定语从句 1、who, whom, that 这些词代替的先行词是人的名词或代词： (1) He is the man. The man wears a blue jacket. . （ the man） (2) He is an actor. I saw this actor yesterday. .（ the man） 2、Whose 用来指人或物 代替的是“-----的” (1) He loves a girl. The girl’s hair is short. (2) Please pass me the book. The book’s color is green. . 3、 which, that 它们所代替的先行词是事物的名词或代词，例如： (1) This is a question. This question bothers many people. 在从句中作主语， 代替的是
（ . which / that 在句中作主语） (2) He has got all the tools. We need these tools. (which/ that 在句中作宾语）
二：关系副词引导的定语从句 1. when 指时间
I still remember the day. On that day, my phone was stolen on the bus.
2. where 指地点
Shanghai is the city. I met my husband in this city.
3. why 指原因 (1) Please tell me the reason why you missed the plane. 注意：关系副词引导的从句可以由“介词+关系代词”引导的从句替换 (1) The reason why/ for which he refused the invitation is not clear.
(for the reason. 这时的 Which 指代 the reason) (2) I still remember the day when/ on which my phone was stolen on the bus. (on the day. 这时的 Which 指代 the day) (3) Shanghai is the city where/ in which I met my husband. (in the city. 这时的 Which 指代 the city)
3.那是我永远不会忘记的一天。 4.他正在写的笔是我的。 6.我需要迅速完成这项工作的人。 7.上星期来看我们的姑姑是我父亲的姐姐。 8.有一个叫 LISA 的客户想要见你。 1. Don’t talk about such things of __________ you are not sure. A. which B. what C. as D. those 2. Is this the factory __________ you visited the other day? A. that B. where C. in which D. the one 4. Is this the factory __________ he worked ten years ago? A. that B. where C. which D. the one 10. That tree, __________ branches are almost bare, is very old. A. whose B. of which C. in which D. on which 12. He failed in the examination, __________ made his father very angry A. which B. it C. that D. what 13. We’re talking about the piano and the pianist __________ were in the concert we attended last night. A. which B. whom C. who D. that 14. The girl __________ an English song in the next room is Tom’s sister. A. who is singing B. is singing C. sang D. was singing