interesting. 2) I have the same plan as you.
2. 当非限制性定语从句放在主句前面时，只 能用as.
eg. As is known to everybody, the moon travels round the earth once every month.
They lived in a house, the door of which open to the south.
They lived in a house, of which the door opens to the south.
如果定语从句中的介词短语是固定搭配， 则介词不能提前
eg: 1) He is the man who I am looking for.
e.g. He bought a book that could give him much knowledge and which could help him to kill the time.
考点三：as与which引导的定语从句
两者均可引导定语从句，但下列情况多用as。 1. 当与such或the same连用时，一般用as。 e.g. 1) Such books as you gave me are
注意： 1. 定语从句中的谓语动词与先行词保持一 致。
2. not the only one of…＝ one of … eg. Tom is not the only one of the boys who have passed the exam. ＝ Tom is one of the boys who have passed the exam. 汤姆并非是唯一一个通过考试的男孩。 （汤姆只是通过考试的男孩中的一个。）
The Attributive Clause
定语从句概念：
1、复合句中，修饰主句中某一名词/代词 的从句称为定语从句。
2、所饰名词称为先行词。
指
人
关
的
系 代
关 系 代
词
词
的
指
用
物
法 小 结
的 关 系 /who
一致
宾语
可 省略 that/who(m)
定语
whose
主谓 主语 一致that/which
1)This is the first time (that) we shall see an English film.
2)The way (that) we did it very simple.
3)This was at a time when∕during which there were no radios, no telephones or no TV sets.
易混淆句型训练
（1）There are two boys in Peter's，both of _w_h_o_m_ are white．
（2）There are two boys in Peter‘s，and both of _t_h_e_m__ are white．
（1）John is one of the students who _k_n_ow__ English． （2）John is the only one of the students who _kn_o_w_s_ English．
注：as多用于下列习惯用语中：as anybody can see(正如人人都能看到的那样)；as is well known＝as is known to all(众所周知)；as we had expected(正如我们所预料的那样)；as often happens(正如经常发生的那样)；as has been said before(如上所述)；as is mentioned above(正如上面提到的)等。
2) He has three sons, all of whom are teacher
如5,11,16题
关系代词前介词的确定
2. Whose从句可转换为“ of +关系代词”型，如： e.g. They live in a house, whose door opens to the
south.
2. 当定语从句中行为动词是主动语态，一般用which 作主语。
eg. Tom has made rapid progress, which makes me very happy.
如7，18题
注：当先行词是way（方式方法）时，根据英语的习 惯常用that和in which 来引导定语从句， 而且 也常常省略；另外当先行词是time（次），其前 面用序数词修饰时，根据英语的习惯常用that来 代替for which 来引导定语从，但time作“一段 时间”讲时，应用关系副词when或介词 +at∕during+which引导定语从句。如：
可 宾语 省略 that/which
定语
whose
关系代词前介词的确定
1.非限制性定语从句中，要表示先行词 的一部分时，可用“数词/代词 + of + 关系代词”的结构，如：
e.g. 1) There are 50 students in our class, twothirds of whom have been to Beijing.
2) He is the man who I am looking after.
3) He is the man who I am looking at.
只用which，不用that的情况：
a. 引导词前有介词时；
如 8，12，15，20，23，24，25题
b. 引导非限制性定语从句时；
c.一个句子中若有两个定语从句，一个用that 引导，另一个用which引导；
如19题
而下面两种情况只能用which.
1. 当定语从句放在主句后面时，如果定语从句是否 定句或表示否定时只能用which.
eg. 1) He came here very late, which was unexpected(not expected).
2) Mr.Smith usually praises his student Rose, which she doesn’t like at all. 如7，18题