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1、UnitUnit 1 1 GrammarGrammar 【学习目标】：非限制性定语从句 【学习重点】：非限制性定语从句和限制性定语从句区分 【学习难点】：as 和 which 的区分 【教学过程】： 定语从句有限制性和非限制性两种。 限制性定语从句是先行词不可缺少的部分，去掉它主句意思往往不明确；非限制性定语从句 是先行词的附加说明，去掉了也不会影响主句的意思，它与主句之间通常用逗号分开，例如： This is the house which we bought last month. 这是我们上个月买的那幢房子。（限制 性） The house, which we bought last m
2、onth, is very nice.这幢房子很漂亮，是我们上个月 买的。（非限制性） 一、thatthat 不能用来引导非限制性定语从句不能用来引导非限制性定语从句。如： 【考例一】She heard the terrible noise, _brought her heart into her mouth. A. it B. which C. this D. that 【解析】选 B。后半句为非限制性定语从句，尽管先行词 noise 属于事物，也不能用 that 而 要用 which 来引导。which 指代 noise，在从句中作主语。 二、除除 whichwhich 外，还可用外，还可
3、用 whenwhen，wherewhere，whosewhose，whomwhom 等引导非限制性定语从句，且各自的等引导非限制性定语从句，且各自的 用法及差异与它们用在限制性定语从句时相同。用法及差异与它们用在限制性定语从句时相同。如： She is going to live in Macao, where she has some close friends. 她要到澳门去居 住，在那里她有几个密友。 (关系副词 where 指代表示地点的名词 Macao，并在从句中作状 语。) 【考例二】Recently I bought an ancient Chinese vase, _was v
4、ery reasonable. A. which price B. the price of which C. its price D. the price of whose 【解析】选 B。whose 在从句中作表示所属关系的定语，既可指代人，也可指代物。指物时， 常可转换为 of which；指人时常可转换为 of whom。 三、非限制性定语从句的关系代词非限制性定语从句的关系代词 whichwhich，既可以指代前面的先行词，也可以指代前面整句，既可以指代前面的先行词，也可以指代前面整句 的含义。的含义。如： 【考例三】 Dorothy was always speaking high
5、ly of her role in the play, of course,_made the others unhappy. A. who B. which C. this D. what 【解析】选 B。指代“Dorothy 总是高度评价自己在那场戏中所担任的角色”的整个事件。 【考例四】Carol said the work would be done by October,_personally I doubt very much. A. it B. that C. when D. which 【解析】表示时间的名词 October，用“我个人非常怀疑”来修饰，意思不通。应该修饰整 个
6、主句， 表示对“Carol 说在十月前能做好这项工作”怀疑。故选 D。 四、引导非限制性定语从句时引导非限制性定语从句时 asas 和和 whichwhich 的差的差异：从句置于句首时，非限制性定语从句只异：从句置于句首时，非限制性定语从句只 能用能用 asas 引导，而置于句末时，两者都可以使用。引导，而置于句末时，两者都可以使用。 如： 【考例五】_is known to everybody, the moon travels round the earth once every month. A. It B. As C. That D. What 【解析】逗号表明为非限制性定语从句。选
7、 B。 一、定语从句专练习: 用恰当的关系词填空。 1. Do you know the place _ he borrowed the book? 2. He talked about the teachers and schools _ he had visited. 3. Some of the roads were flooded, _ made our journey more difficult. 4. The novel _ youre interested was written by Mark Twain. 5. _ is often the case, we have wo
8、rked out the production plan. 6. Yesterday I met an old friend, _had a gift of music. 7. _ is reported, Chinese team won the final. 二，单项选择 1.I have two brothers, are both good at playing football. A. who B. that C. / D. which 2.He was very rude to the Customs officer, made things even worse. A who B
9、. whom C. what D. which 3. Look out! Dont get too close to the house _roof is under repair. A. which B. whose C. of which D. what 4. is mentioned above, the number of students in senior high schools is increasing. A. Which B. As C. That D. It 5. It rained hard yesterday, prevented me from going to the park. A. that B. which C. as D. it 6. At last , they came to a beautiful island, _they enjoyed a good picnic. A. which B. where C. on it D. there
