高考英语一轮复习每日一题第14周as与which引导的定语从句 5页

as与which引导的定语从句 高考频度：★★★★★ 难易程度：★★★★☆‎ ‎ 1.The number of smokers，________is reported, has dropped by 17 percent in just one year.‎ A.it B.which C.what D.as ‎【答案】D ‎【解析】分析句子结构可知，空处引导非限制性定语从句，指代的是整个主句的含义，故可排除A、C两项。as引导非限制性定语从句时，表示＂如同，正如＂，符合题干意思，故选D项。‎ ‎2. It is a truly delightful place, ________ looks the same as it must have done 100 years ago with its winding streets and pretty cottages..‎ A. as B. where C. that D. which ‎【答案】D as与which引导非限制性定语从句的比较 一、相同点 两者引导非限制性定语从句时，可指代主句中的部分或整个句子的内容，在从句中作主语、宾语或表语，位于主句之后有时可互换。‎ The meeting was put off, as /which was exactly what we wanted. 会议被推迟了，这正是我们想要的。‎ He was a doctor, as/which I knew from his manner. 他是一名医生，我是从他的举止中知道的。‎ 二、不同点 ‎1.‎ ‎ as可以放在主句前后，也可插入主句之中；而which引导的非限制性定语从句只能位于主句之后。‎ As is known to all, fish can’t live without water. 众所周知，鱼离开水无法生存。‎ Air, as we know, is gas. 正如我们所知，空气是气体。‎ ‎2. 在非限制性定语从句中，which后的be动词不可省；而as后的be动词可以省略。‎ She told me she won the match, which was a lie. 她告诉我们她赢得了比赛，这是一个谎言。‎ The material is elastic, as (was) shown in the figure. 这种材料是有弹性的，正如图中所示。‎ ‎3. which在非限制性定语从句中作主语时可用各类动词作谓语；而as作主语时，谓语常用系动词，如be，seem，become等，一般不用其他行为动词。‎ He saw the girl, which delighted him. 他看见了那个女孩，这让他很高兴。‎ He didn’t say anything at the meeting, as/which seemed very strange. 他在会议上一言未发，这看起来非常奇怪。‎ ‎4. as常用＂正如＂含义，常用的结构有as we know（众所周知）；as often happens（正如常发生的那样）；as is often the case（情况常常如此）；as we all can see（正如我们看到的）；be announced / expected / known / imagined / mentioned / said / shown / reported等。这些结构常放句首，偶尔也可以放句中或句末。‎ As is known to all, China is a developing country. 众所周知，中国是一个发展中国家。‎ Kate was late for school, as often happened. 凯特上学迟到了，正如常发生的那样。‎ ‎5. 在非限制性定语从句中，which可指代主句中的某一个单词，as不可以。‎ My brother enjoyed playing basketball, which he really plays well. 我哥哥喜欢打篮球，他打得非常好。‎ Beijing, which he was born in, is our capital. 北京，他出生的地方，是我们的首都。‎ ‎6. ＂介词+关系代词（介宾代物）＂中关系代词只能用which。‎ The Travel Agency, with which our company has been dealing for several years, has opened for new branches. 那家与我们交易了好几年的旅行社又开了新的分店。‎ Air is a mixture of gases, of which oxygen forms 21 percent. 空气是一种气体的综合体，其中氧气占了21%。‎ ‎7. 从句中的谓语动词是否定形式时，常用which。 ‎ He can write a letter in English, which I can not. 他可以用英语写信，我不能。‎ Metal will bear beating with a hammer, which a stone will not. 金属能承受得住用锤子敲打，但是石头则不能。‎ ‎8. 非限制性定语从句中的关系代词代表前面主句中的宾语从句时，常用which。‎ He said he had passed the exam, which was untrue. 他说他通过了考试，这是假的。‎ ‎ 1. —Dad, let’s go white-water rafting!‎ ‎—Ok. But equip yourself first. It is not such an easy job ______________ it looks.‎ A.as B.which ‎ C.that D.what ‎2. ______________ is often the case, a small child will feel unhappy and cry a lot the first time he or she goes to kindergarten.‎ A.As B.Which ‎ C.That D.What ‎3. The beginning of the story is excellent, ______________ is the ending, ______________ leaves us much to think.‎ A.as；which B.so；that ‎ C.as；that D.such；which ‎4. A Bridge Too Far is a book written by Cornelius Ryan, ______________ was made into a film in 1977.‎ A.that B.which ‎ C.what D.it ‎5. It rained very hard yesterday, ______________ prevented me from going to the school.‎ A.that B.it ‎ C.as D.which 参考答案 引导。‎ ‎3. A 【解析】考查定语从句。句意：这个故事的开头很好，正如结尾一样，留给我们很多需要思考的东西。本句中前文＂The beginning of the story is excellent＂为下文＂is the ending＂的逻辑主语，用as引导定语从句时，先行词可以是一个词，也可以是一句话。so和such无此用法。第二空为非限定性定语从句，先行词＂The beginning of the story＂为下文定语从句的逻辑主语，指物，故关系词用which。选A。‎ ‎4. B 【解析】考查非限制性定语从句。句意：《遥远的桥》是Cornelius Ryan所写的一本书，在1977年被拍成了电影。which引导非限制性定语从句，并在从句中作主语。故选B项。‎ ‎【易错提醒】本题易误选A项或者D项。that和which 均可引导定语从句，但是that不能引导非限制性定语从句，故可排除A项。由于空格前缺少连词，因此不能用it。‎ 进步，在于总结。我在这，总结在哪儿？‎ ‎________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________‎