. 限制性定語從句的特殊用法
II. 非限制性定語從句
III. 同位語從句
IV. 同位語從句和定語從句的區(qū)別
I. 限制性定語從句的特殊用法
1. way + 定語從句
way 后面跟定語從句有三種形式.
(1) way + in which + 定語從句
例如：
She was pleased with the way in which he had accepted her criticism.
(2) way + that +定語從句
例如：
They didn’t do it in the way that we do now.
(3) way + 定語從句
例如：
He didn’t speak the way I do.
2. as 引導的定語從句
(1) 在由 as 引導的定語從句中所修飾的詞（先行詞）前面常有 such 或 the same.
例如：
Such people as you describe are rare nowadays.
I have the same trouble as you (have).
(2) As 在定語從句中可以作主語、賓語或表語.
例如：
Let’s discuss only such questions as concern everyone of us.（作主語）
I never heard such stories as he tells.（作賓語）
I’ve never seen such a clever man as he is.（作表語）
(3) As 有時引導非限制性定語從句,可在定語從句中作主語、賓語、表語,修飾主句,常解釋為正如、如同.
例如：
As is known to all, the earth moves round the sun.（作主語）
As was expected, he performed the task with success.（作主語）
As he predicted, the wind changed.（作賓語）
The meeting is very important, as indeed it is.（作表語）
II. 非限制性定語從句
1.非限制性定語從句由 who, whom, which 引導（不可用 that）,還可以由 whose, when, where 等詞引導.
非限制性定語從句要用逗號隔開,非限制性定語從句可以刪去,整個句子的意思還是完整的,而限制性定語從句如果被刪去,句子的意思不完整.
例如：
Mr Brown, who is our English teacher, lives near our school.
Yesterday I met my son’s school master, whom you saw at my home last year.
He has finished the difficult exercise, which is easy for you.
The factory is headed by a 35-year-old man, whose wife is from America.
They will fly to Qingdao, where they plan to stay for two weeks.
In these days, when I was a child, the city had no industry to speak of.
注意：非限制性定語從句中的關(guān)系詞是不可省略的.
2.非限制性定語從句有時并非修飾名詞或代詞,它可以修飾整個句子.
例如：
They have invited me to visit their country, which is very kind of them.
3.in front of, at the back of, in the middle of 等短語在定語從句中的用法.
如果關(guān)系代詞是作這類介詞短語的賓語時,介詞短語必須提前.
例如：
Yesterday afternoon we arrived at his log cabin, in front of which stood a tall
tree.
4.注意此類句子表達方式.
There are forty students in their class, thirty of whom are League members.
也可以改成
There are forty students in their class, of whom thirty are League members.
III.同位語從句
同位語從句常跟在 idea, fact, doubt, thought, belief, news, hope 等詞后面,由連接代詞 that（不可用 which）和連接副詞 when, where, whether 等引導.
例如：
I had no idea that you were here.
The fact that he is unfit for his job is quite clear.
Then arose the question where we were to get the machine needed.
All the time she was in bitter doubt whether she was right.
IV.同位語從句和定語從句的區(qū)別
同位語從句用于名詞后面,對該名詞的內(nèi)容作進一步說明,連接詞在從句中不作成份.
定語從句用于修飾名詞或代詞,引導定語從句的關(guān)系代詞或關(guān)系副詞往往在定語從句中作一個成份.
例如：
Have you heard the news that Mr Smith will come to give a lecture on Irish Fairy Tales?
這里 that 引導的是同位語從句,不可以用 which 代替 that, 連接代詞在從句中不作成份.
Have you told him the news that I told you last week?
這里 that 引導的是定語從句,可以用 which 代替 that,它在定語從句中作賓語.
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