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今天的语法专题是：状语从句，包括原因状语从句，条件状语从句，让步状语从句，结果状语从句，目的状语从句等。我们先来做四道题： 1. _______ the average age of the population increases, there are more and more old people to care for. A. Unless B. Until C. As D. While 2. _______ online shopping has changed our life, not all of its effects have been positive. A. Since B. After C. While D. Unless 3. In the global economy, a new drug for cancer, _______ it is discovered, will create many economic possibilities around the world. A. whatever B. whoever C. wherever D. whichever 4. You can borrow my car ________ you promise not to drive too fast. A. unless B. even if C. in case D. as long as 请大家认真思考作答后再往下翻哈~ Duangduangduang~~答案来了！！ 1. _______ the average age of the population increases, there are more and more old people to care for. A. Unless B. Until C. As D. While 【答案】C 【解析】考察原因状语从句。句义：因为人们的平均寿命上升了，所以有越来越多的老人要照顾。根据句义，可以判断出从句和主句是因果关系，在四个选项中只有as可以表示“因为”，引导原因状语从句。所以正确答案为C. As。 【知识梳理】可以引导原因状语从句的连接词有：because, for, as, since，它们的区别如下： 1）because：强调直接原因（注意不能和so一起用）。e.g. I didn’t pass the exam, because I had been ill for a week. 2）for：表示间接的推断（不能放句首）。e.g. I didn’t pass the exam, for I only got 59. 3）as/since：后面接比较弱的理由，通常是众所周知的原因。e.g. As/ Since it’s getting colder, hot chocolate is the most popular drink our the café. 2. _______ online shopping has changed our life, not all of its effects have been positive. A. Since B. After C. While D. Unless 【答案】C 【解析】考察让步状语从句。句义：虽然线上购物已经改变了我们的生活，它的影响并不都是积极的。根据主从句意思可以判断出，从句是作让步，表示“虽然”，“尽管”，在四个选项中：since表示“自从”或“因为”，after表示“在…之后”，unless表示“除非”，只有while可以表示“虽然”引导让步状语从句。所以正确答案是C. while。 【知识梳理】while的主要用法: 1）表示“当…的时候”，搭配延续性动词。e.g. While I was watching TV, my telephone rang. 2）对比转折，表示“然而”。e.g. I am outgoing, while my sister is shy. 3）表示“虽然，尽管”。e.g. While I understand what you mean, I don’t agree with you. 3. In the global economy, a new drug for cancer, _______ it is discovered, will create many economic possibilities around the world. A. whatever B. whoever C. wherever D. whichever 【答案】C 【解析】考察让步状语从句。句义：一种新的抗癌药物，无论它是在哪里发明出来的，都会给全世界带来很多经济上的可能性。通过分析句子成分，可以知道从句中不缺主干成分（也就是不缺主谓宾），所以可以排除A，B，D。wherever表示无论在哪里，也可以换成no matter where，引导让步状语从句。所以正确答案是C. wherever。 4. You can borrow my car ________ you promise not to drive too fast. A. unless B. even if C. in case D. as long as 【答案】D 【解析】考察条件状语从句。句义：只要你保证不开得太快，你就可以把我的车借走。unless表示“除非”，even if表示“即使”，in case表示“万一”，带入句子意思都不对。as long as表示“只要”，引导条件状语从句。所以正确答案是D. as long as. 【知识梳理】可以引导条件状语从句的常见连接词有： 1）if 如果。e.g. If you come to Shanghai, call me. 2）unless 除非。e.g. We will go to the park unless it rains. 3）as long as 只要。e.g. You can borrow my car unless you promise not to drive too fast. 4）provided that 假若。e.g. I will let you use my room provided that you keep it clean. 5）suppose/ supposing 假设。e.g. Supposing that we can finish the homework on time, what will our teacher say? 6）on condition that 如果。e.g. Your parents will take you to the amusement park on condition that you finish all the homework. 7）in case 万一，如果。 e.g. Give me a call in case you have any difficulties. |
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来自： 久离rrh2z6c2a9 > 《英语》
