2021届高考英语二轮复习17：状语从句-学案

状语从句 学习目标：1.掌握状语从句常考知识点；2.能在具体的语境中灵活运用状语从句。 引入： After spending between six and eight hours in class, students are expected to spend between two and four hours at home doing homework. These extra hours of work leave students 1 (feel) tired and stressed and it leaves students with little free time for other activities, such as sports. Earlier, China’s Ministry of Education said it wanted to ban homework in primary schools and asked parents for their comments. Most parents were 2 the idea. They understood that homework put pressure on their children 3 they felt that the extra work was necessary if their children hoped to enter a good middle school. The debate between homework or no homework 4 (go) on in American schools for years and no one has come up with 5 solution. What most agree on, though, is that homework should be relevant, and it should help the student strengthen 6 he or she has learnt in class. It should not be given routinely just to keep the student busy in the evening. In China, because of the entrance tests for high school and university, doing endless exercises at home is considered necessary because students have to prepare 7 for the tests by practicing a lot. Unless a system is changed, it’s doubtful that Chinese students 8 (relieve) of their homework burden any time soon. 提高题： 1. feeling 2. against 3. but 4. has been going 5. a 6. what 7. themselves 8. will be relieved 知识要点： What always goes up and never goes down? (什么东西只升不降？) 状语从句定义 Key concept: 状语从句在复合句中起状语的作用，用于修饰主句中的谓语动词、形容词和副词等。状语从句一般由连词引导，连词不充当任何成分，只起连接作用。 【知识梳理1】时间状语从句的引导词 引导时间状语从句的从属连询很多，常见的有before，after, when, while, as, since, till, until, as soon as等。 1. 时间状语从句常见的引导词： 1）表示“当……时候”：when Eg. Mozart started writing music when he was four years old. (在)莫扎特4岁的时候，开始写音乐作品。 批注：例句中的两个动作started和was, 都发生在过去，客观描述过去事实，动词既可以用短暂性的，也可以是持续性的。具体辨析见节讲解。 【例题精讲】 例1. It was April 29, 2011 ____