文档介绍：The Attribute
III. 定语从句：
(一）关系词的确定与选择
一看先行词（人/物）
二看关系词在从句中的作用（主/谓/宾/表/定/状/补）
三看特殊用法
1． 在下列情况下只用that，不用which
like a snake, as anybody can see.
Mary was late for school, as often happened.
As is known to all, the earth is round.
★ 当as作主语时，后面常接下列句型：
1．as has been said before 如上所述
2．as may be imagined
正如可以想象出来的那样
3．as is well known 众所周知
4．as was expected 正如预料的那样
5．as has been already pointed out
正如已经指出的那样
6．as we all can see 正如我们都能看到的
★  as 指代一句话和which 指代一句话的用法区别
当主句和从句语义一致时，用as；当两句语义不一致或从句为否定时，用which。
He made a long speech, ________ was expected.
He made a long speech, _________was unexpected.
Tom drinks a lot every day, _________ his wife doesn’t like at all.
as
which
which
5. whose + n 表示所属关系，可变为n + of which/ whom，
★ 表示部分关系时，也可用部分关系词 + of which/ whom.
The buses, most of which were already full, were surrounded by the angry crowd.
6. 关系副词when, where, why也相当于介词 (on, in, at, for) + which
I’ll never forget the years ____________ we worked together.
I’ll never forget the day _______________ I joined the Party.
in which /when
on which/ when
（二）定语从句中的主谓一致
引导词在定语从句中作主语时，其谓语动词人称和数要根据引导词所指内容而定。例如：
1.  Here are such sentences as _______often used by the students.
2.  I, who ______a Party member, should work hard for our country.
3.  He was one of the students who ________praised for it.
4.  He was the only one of the students who ________praised for it.
are
am
were
was
（三）易与定语从句混淆的其他复合句
1． 定语从句与同位语从句
定语从句与前面的名词是修饰与被修饰的关系“……的（名词）”。而同位语从句是用来说明前面名词的内容。与that从句同位的名词必须是一些表事实或概念的抽象名词，如fact, news, belief, truth, reply等。that在定语从句中作成分，可用which 或who/whom代替；而that在同位语从句中不充当任何句子成分，只起连接作用。试比较：
①    We all have heard the news _________ our team won.
②    We don’t believe the news ___________ he told us yesterday.
that
(同位语从句，that从句表示news的内容，that 在从句中不作任何成分)
that/which
(定语从句，that 作told 的宾语)
2． 定语从句与状语从句。试比较：
①    He left the key___________ he had been an ho