英语时态——定语从句.ppt

1、定语从句,定义及其作用： 定语从句可分为：限制性定语从句和非限制性定语从句。 定语从句一般都紧跟在它所修饰名词后面，所以如果在名词或代词后面出现一个从句，根据它与前面名词或代词的逻辑关系来判断是否是定语从句。,先行词的作用 被定语从句所修饰的名词或 代词叫做“先行词”。引导定语从句的词叫“关系词”。关系词有两个作用： 一、引导定语从句 二、代替先行词在其引导的定语从句中充当一定的句子成份。 理解和牢记这两条概念，弄清楚关系词在定语从句中充当什么成分，是掌握定语从句的关键。,绿通P56,关系词：关系代词 that which who whom whose 关系副词 when why where,

2、注意：要明确：关系词的选择不光看先行词， 主要看关系词所代替的先行词在从句中的作用； （2） 定语从句的难点是：“介词 + 关系代词”引出的定语从句，as、which引出的特殊定语从句。,1. Women who drink more than two cups of coffee a day have a greater chance of having heart disease than those who dont. 2. The CCTV tower, whose base is an electrical equipment shop, is frequently visited

3、by travelers. 3. The Chinese government has made the Mid-autumn festival a legal holiday, when people will have a day off.,修饰物的关系代词that和 which的区分 使用that的情况： 1、当先行词是nothing, something, anything, all, each等不定代词时。 eg. Do you have anything that is important to tell me? 2、当先行词被all, any, some, no, not, ev

4、ery, each等修饰时。 eg. I have some books that are very good. 3、当先行词被形容词最高级、序数词所修饰时。 eg. This is the first book that I bought myself. The biggest bird that I caught is this bird.,4、当先行词被the very, the last, the next, the only 等词修饰时。 eg. This is the very book that I lost yesterday. 5、当先行词又有人又有物时。 eg. I won

5、t forget the things and the persons that I saw. 只能使用which的情况。 1、非限制性定语从句中。 eg. Mary has a book, which is very precious. 2、在介词之后。 eg. This is a house in which lives an old man. 3、当主句中的主语被that修饰时。 That dog which I found in the street belongs to Mary.,Fill in the blanks with suitable relative pronouns.

6、 1. This is the only book _ I got last year. 2. Is this the book in _ you are interested? 3. This is the largest animal _ Tom saw in the zoo. 4. Rose still remembers the trees and teachers_ exist (存在)in the mother school. 5. All the desks _ are bought look really wonderful. 6. Do you have any money

7、_is used to build the factory? 7. Tom has a toy, _ was given by his father. 8. This is the second watch _ my father bought for me.,that,which,that,that,that,that,which,that,修饰人时关系代词that 和who, whom的区分。 当主句中的主语是who时，只能用that。 eg. Who is the girl that is standing over there? 在非限制性定语从句中以及介词后面时只能用who 或者wh

8、om。 eg. I have a son, who is really lovely and interesting. There are 40 students in the class, most of whom are boys. 关系代词whose既能修饰人，也能修饰物，在定语从句中充当定语，修饰先行词。 eg. She is the girl whose English sounds very beautiful. Mary has a very good dog, whose hair turns out white and black.,1. Under the big tree

9、 are 34 students, many of them come from class two. 2. My mother has a good book, which cover looks terrible. 3. Who are the young girls who are having dinner in the restaurant? 4. She is one of the girls who is very interested in maths. 5. Tom is the only one of the boys who like playing football.

10、6. Who is the girl that you talked to her just now? 7. This is the very pen that you gave it to me before. 8. There is an old woman, that is holding a stick.,whom,whose,that,are,likes,her,it,who,关系代词as的用法及其与which的区别。 关系代词as在定语从句中指代整件事，充当句中的主语或者宾语，它经常和the same, such, as一起搭配使用，共同构成一个固定词组。 eg. As we al

11、l know, he is a famous scientist. He is a diligent boy, as is expected. She has the same book as you have. 关系代词as可以放在句子的开头，可以使用被动语态，而关系代词which则不可以。请比较： As everyone knows, it is necessary to build a hospital in this small town. It is necessary to build a hospital in this small town, which is clear to

12、 us. Our department will hold the meeting,as is known by us.,关系副词when, where, why的用法以及与关系代词的区分。 关系副词在定语从句当中只能充当状语，当一个句子能够完整地表达一个意思时，我们就可以给这个句子加上特定的关系副词。 eg. I wont forget the time when I got married. Have you still remember the days when we stayed together? This is the place where we had a good time

13、. Is this the house where Mr Smith lives? I dont know the reason why he wont join us. Do you know the reason why he didnt come to sweep the classroom?,关系副词when, where和关系代词that, which的区分。同样是修饰一个地点，有时使用where，有时使用that/which；同样是修饰一个时间，有时使用when， 有时使用that/which。这主要看两点：一是定语从句是否完整；二是定语从句中的谓语动词是否是一个及物动词。请比较以

14、下句子： This is the park that we visited last year. This is the park where we held a birthday party. She wont forget the days that she spent on the island. She wont forget the days when they stayed together. Thats the date when we went to the college. Thats the date that she wont forget for ever. I lik

15、e the time when we lived together. I like the time that we had together.,1. Is this the room _ you cleaned last time? 2. Is this the room _ we lived before? 3. This is the garden _ they stayed for a night. 4. This is the garden _ they visited last time. 5. Tom has forgotten the day _ he left his hom

16、e. 6. Tom has forgotten the day _ I told him last day. 7. She still remembers the year _ she found her first job. 8. She still remembers the year _ she spent in Jining.,that,where,where,that,when,that,when,that,关系副词when, where, why 和介词+which之间的关系。关系副词when, where, why可以用适当的介词+which来替代。如：when=in/on/at

17、+which, where=in/on/at+which, why=for+which介词的位置非常灵活，有时放在关系代词之前，有时放在动词之后。 eg. 1. I wont forget the date when( on which) I was born. 2. This is the room where (in which) I lived. = This is the room which I lived in. 3. I dont know the reason why (for which) he havent come today. 4. Tom still remember

18、s the days when (in which) they lived in Tianjin.,1. Is this the room _ we spent our childhood? 2. This dictionary is the second one _ I bought in the shop. 3. I still remember the date _ I went to Nanjing for the first time. 4. Tom is thinking about the grass and the persons _ he saw in the yard. 5. There are 100 old