高考一般不考查as与which引导非限制性定语从句的区别，但近年高考试题中出现过这个考点。一般来说，如果从句的含义是顺接主句的叙述，那么这两个词都可以使用;如果从句的含义是对主句的否定，或者语意不是顺接的，则只能用which。如：

①He came late to school，which/as was what we had expected.他上学迟到了，这是我们意料中的。

②He came late to school，which surprised US a11.他上学迟到了，这让我们所有人都很惊讶。(不可用as)

考点3  关系代词、关系副词引导定语从句的辨别

关系代词在定语从句中充当主语、宾语或表语;而关系副词在定语从句中充当时间、地点、原因等状语。一般来说，关系副词在语义上相当于”介词+which”结构。试比较：

①I’ll never forget the days which I spent with you.我不会忘记我们在一起度过的岁月。(which在定语从句中作spent的宾语)

②I’ll never forget the days when(=in which)we studied in Beijing.我永远不会忘记我们一起在北京学习的时光。(when在定语从句中作时间状语，studied在此处为不及物动词，后面不再接宾语)

考点4  定语从句的间隔现象

定语从句一般紧接被它修饰的先行词，但有时候它和先行词之间有可能插入其他成分，使它与先行词分隔开来，这种定语从句叫做被分隔的定语从句。在这种情况下，对关系词的准确判断显得相当重要，而且在阅读文章时会经常遇到这种情况，在阅读时要注意识别。一般来说，定语从句被分割开来大致有以下三种情况：在先行词与定语从句之间插入一个状语、定语，或被谓语动词分隔开。如：

①Do you remember one afternoon ten years ago when I came to your house and borrowed a diamond necklace?你还记得十年前的一天下午，我来到你家，找你借了一条钻石项链吗?

(先行词one afternoon与定语从句被状语ten years ago分隔开了)

②A new teacher will eOlTle tomorrow who will teach you German.明天，一位新老师将来教你们德语。(先行词a new teacher与定语从句被谓语部分和时间状语will come tomorrow隔开了)关系代词在下列情况下常省略：(1)作及物动词的宾语时;(2)作介词的宾语，当关系代词与介词分开使用时，可以省略。但若是关系代词与介词连用，则不能省略。如：

①The coat(that)I put on the desk is blue.我放在桌子上的那件外套是蓝色的。(作动词put的宾语)

②who is the teacher(whom)Li Ming is talking to?正在与李明谈话的老师是谁?(作介词to的宾语)

③Please tell me from whom you borrowed the English novel.请告诉我你从谁那儿借的这本英文小说。(关系代词不能省略)

有些句型结构如同位语从句、状语从句和强调句与定语从句结构较相似，稍不认真就会出错。

1.定语从句与同位语从句的区别

定语从句是对其先行词的修饰或限制，属于形容词性从句的范畴;而同位语从句是对前面抽象名词的进一一步说明和解释，属于名词性从句的范畴。如：

①He makes a promise that if he Call get the job，he will work hard to make as much money as he can for the eompany.他许诺如果他能获得那份工作，他将努力为公司挣尽可能多的

钱。(that引导的同位语从句是对先行词a promise的进一步解释和说明)

②Mike’s parents made a special promise to Tom that surprisedTom.迈克的父母对汤姆许下了一个特别的诺言，这使得汤姆很惊奇。(that引导的定语从句是对先行词promise的修饰和限制)

2.定语从句与强调句的区别

定语从句和强调句的判断方法：若将句中的“It is/was…that/who”去掉，而句子不缺成分，结构完整，说明原句是强

调句。如：

It was in 1 998 that the flood destroyed many houses in Jiangxi.在1998年，洪水毁坏了江西地区很多的房屋。(强调句)

(判断方法：如果去掉it was和that，剩下in 1998 the flood destroyed many houses in Jiangxi，句子结构完整，可判定原句为强调句)

3.定语从句与状语从句的区别

定语从句在句子中作定语，修饰名词、代词或句子;并且，这个被修饰的名词、代词或句子称为先行词，通常放在定语从句之前。状语从句在句子中作状语，修饰动词;通常不同的状语从句有不同的连词，位置较灵活，通常放在句首或句末，有时也放在句中。

以where为例来说明：

①Let’s have a short meeting where we met last time.我们在上次见面的地方开个短会吧。(Where we met last time是地点状语从句，在句中作地点状语，表示开会的地方)

②This is the place where we had a meeting last time.这就是我们上次开会的地方。(Where we had a meeting last time是定语从句，在句中作定语修饰the place)

【试题放送】

【2012山东卷】23. Maria has written two novels, both of ________ have been made into television series.

A. them       B. that

C. which             D. what

【答案】

【解析】此处先行词是two novels，后面是一个非限制性定语从句且介词前置，因此用both of which引导。句意：Maria写了两部小说，两部都被拍成了电视剧。

【考点】考查非限制性定语从句的用法。

【2012福建卷】23. The air quality in the city, ________is shown in the report, has improved over the past two months.

A. that B. it       C. as    D. what

【考点】本题考查定语从句的引导词

【答案】C

【解析】本句难点是把定语从句分割出来放在句首就很明了了，把句子转换成      is shown in the report, the air quality in the city has improved over the past two months.就能直接看到非限制性定语从句引导词放句首指的是下文所提到的一句话用as引导“正如在 所写的那样”。

【2012安徽卷】29. Alot of language learning,    has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.

A. as            B. it                 C. which          D. This

【答案】A

【解析】如果选择B或D 就出现了两个句子了。本题考查非限制性定语从句,关系代词指整个一句话Alot of language learning is happening in the first year of life。传统考法是直接把从句放在句首，我不知道这里是不是算作句首，我相信学生们也会是一头雾水吧。【as用在句首，which用在句末，正确答案应该是A】

【考点】考查定语从句。

【2012北京卷】26. When deeply absorbed in work, ______ he often was，he would forget all about eating or sleeping.

A. that           B. which         C. where        D. when

【答案】 B

【考点】非限制性定语从句，which作表语。

【2012全国II】8. That evening, _____ I will tell you more about later, I ended up working very late.

A. that   B. which   C. what   D. when

【答案】B

【解析】这里that evening是先行词，其在定语从句中作介词about的宾语，所以用which。句意：以后我将和你谈起的那个晚上，我工作到了很晚。

【考点】考查非限制性定语从句的关系词。

【2012届广西桂林市、崇左市、百色市、防城港市高考联合调研】32.—We’ll take the conditions into careful consideration     you have attached to this contract.

—Thanks. Hope for further cooperation.

A.as B.which C.where D.what

【答案】B

【解析】考查定语从句的关系词。此处the conditions是先行词，其在定语从句中作to的宾语。故用which。

【河南省郑州市2012届英语信息卷(三)】13. Do you remember a certain occasion ______ you were in trouble and at that moment I gave you a hand.

A. where   B. which   C. why   D. when

【答案】D

【解析】考查定语从句。根据后面的时间短语at that moment可知occasion指时间，故要使用关系副词when，相当于at which time。

【2012届保定市高三第一次模拟】32. Lisa，I guess we'd better fix a navigational aid(导航仪)to the car_________we can find our way easily.

A.  which       B.  that           C.  from which      D.  with which

【答案】D

【解析】考查定语从句的关系词。此处a navigational aid为先行词，其在定语从句中作with的宾语。句意：丽萨，我认为我们最好在车上安装导航仪，用它我们能容易地找到路。

【2012届河北省邯郸市高三第一次模拟考试】26. Leave him a note at the reception desk,        he will learn how to find you.

A. which          B. from which     C. with which         D. on which

【答案】B

【解析】考查非限制性定语从句的关系词。此处a note是先行词，其在定语从句中作from的宾语。

相当于：he will learn how to find you from the note。

【2012届河北省普通高考模拟】26.-----How about your job-hunting?

-----No luck.Now，I’ve reached the stage________I don’t care what I do.

A. which           B. where           C.when                    D. that

【答案】B

【解析】考查定语从句的关系词。此处the stage是先行词，其在定语从句中作地点状语。句意：现在我到了我不关心做什么的境地。

【2012届四川省成都石室中学高三二诊模拟】7.A turning point of the continuously high housing price won't appear suddenly because there must be a certain process ___ many factors lead to the change.

A.which          B.what            C.where           D.that

【答案】C

【解析】考查定语从句的关系词。此处process作先行词，其在定语从句中作地点状语，故用where。

【2012届四川省成都石室中学高三二诊模拟】10.Jane's struggle to make a place for herself in the music circle is the kind of life story___a fascinating novel might be written.

A.where         B.by whom            C.for what        D.about which

【答案】D

【解析】考查定语从句的关系词。此处life story是先行词，其后是介词前置的定语从句。相当于a fascinating novel might be written about the story。

【2012届江西省六校联考】26. More teens are smoking in Beijing, ______ the number of primary and middle school students picking up the habit has more than doubled from previous years.

A. which        B. when        C. where        D. that

【答案】 C

【解析】考查定语从句的关系词。Beijing 是先行词，在从句中做地点状语，因此用where引导定语从句。

【2012届浙江杭州重点高中原创模拟】17. Judging from his face_______ there was a confident smile, we knew that he didn’t lose heart.

A. in which          B. from which               C. by which           D. on which

【答案】D

【解析】考查定语从句介词+关系代词的用法。a confident smile on his face.句意为：从他脸上自信的笑容来判断，我们知道他没灰心。故选D。

【2012届浙江杭州重点高中原创模拟】19. We have spotted the location, _______ we thought is the site of Emperor Qin Shihuang.

A. that                   B. what                     C. which            D. where

【答案】C 考查定语从句。分析句子可知空格出引导定语从句，we thought 是插入语，从句缺少主语，应考虑用关系代词，又是非限制性定语从句，故选C。

【2012届浙江省重点中学协作体4月调研】14. ---When did the young man save you?

---January 1st,2000, the first day of the new century,_______ I can never forget.

A. when   B. which    C. that   D. where

【答案】B

【解析】考查非限制性定语从句的关系词。先行词the first day在定语从句中作宾语。