北师大版英语高二上册单元测试unit.doc

虚拟语气用于条件状语从句温故知新 以前我们学过虚拟语气用于条件状语从句，表示对现在和将来情况的假设。现在我们再来简单复习一下这两种情况并学习对过去情况的假设！对现在情况的假设：表示现在实际上并不存在的情况。条件状语从句主句与现在事实相反If + 主语 + 动词过去式（be动词通常用were）主语+ would / should / could / might + 动词原形如：If they were here, they would help you. 如果他们在这儿，他们会帮你。对将来情况的假设：表示将来不大可能实现的情况。条件状语从句主句与将来事实相反A. If+主语+动词过去式（be动词通常用were）B If+主语+were to+动词原形C If+主语+should+动词原形主语 + would / should / could / might + 动词原形小试 指出下列句子是对哪种情况的假设。1. If you should succeed, everything would be all right.2. If you succeeded, everything would be all right.3. If you were to succeed, everything would be all right.Key: 1. 对将来情况的假设 2. 对现在或将来情况的假设 3. 对将来情况的假设请观察下面三个句子，注意主句和从句中谓语动词的使用。1. In the past, if someone like me had failed to get into university through the college exam, he would have had no chance of getting a degree.过去，像我这样不能够通过高考而进入大学的人是没有机会拿到学位的。2. In the past, if someone had worked for a company for over 20 years, they would have stayed there until retirement!过去，如果一个人在一家公司工作了二十多年，他就会留在那家公司直到退休。3. If the trees and flowers had been watered more, they would have grown even better.如果给这些树木和花草多浇一些水的话，它们会长得更好。这三个句子都表示说话者对过去事实的一种推测，它们都有一种相同的表达方式，即：条件状语从句主句与过去事实相反If + 主语 + 过去完成时主语+ would / should / could / might + have + 过去分词如： If she had worked hard, Susan would have succeeded.（解析：这句话的意思是：如果苏珊当初努力的话，她早就成功了。事实上她并不努力，所以没有成功。）If he had not been ill and missed many classes, he would have made progress.（解析：这句话的意思是：要不是他当时生病缺了许多课，他早就进步了。言下之意是由于他生病缺了许多课，所以他没有取得进步。）知识拓展 虚拟条件句的从句部分如果含有were, should或had, 可将if省略，再把were, should或had 移到从句句首，构成倒装。If they were here now, they could help us. = Were they here now, they could help us.If it should rain, the crops would be saved. = Should it rain, the crops would be saved.If you had come earlier, you would have met him. = Had you come earlier, you would have met him.即学即练 . 翻译下列句子。1. 如果她有时间，她会跟你一起去的。2. 如果我是男孩，我就去参军。3. 如果你能更小心一点，米饭就不会烧焦了。4. 如果明天下雨，足球赛就要延期。. 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。1 _ fired, your health care and other benefits will not be immediately cut off.（2006 湖北）A. Would you beB. Should you beC. Could you beD. Might you be 2 _ he had not hurt his leg, John would have won the race.(2007全国卷)A. If B. Since C. Though D. WhenKey: . 1. If she had time, she would go with you.2. If I were a boy, I would join the army.3. If you had been more car