Unit6语法讲解及习题：连词（so…that, unless, as soon as）引导的状语从句 2025-2026学年人教版八年级英语下册

人教英语八下Unit6语法讲解及习题 连词（so…that, unless, as soon as）引导的状语从句 一、语法概念与用法详解 1. 结果状语从句（so…that） so + 形容词/副词 + that 表示“如此……以至于……”，引导结果状语从句，说明主句动作带来的结果。 核心用法 结构：so + adj./adv. + that + 句子 当形容词修饰名词时，也可用 such + a/an + adj. + 名词 + that 替换。 例句（贴合本单元话题） It’s so formal that we don’t do it these days.（它太正式了，我们现在都不这么做了。） Being late is so common that you should be patient.（迟到太常见了，你应该保持耐心。） 替换示例：It’s such a formal custom that we don’t do it these days. 2. 条件状语从句（unless） unless 表示“除非；如果不”，引导条件状语从句，相当于 if ... not。 核心用法 结构：unless + 句子，从句用一般现在时表将来，遵循“主将从现”原则。 可与 if ... not 互换，但 unless 语气更强烈，表“唯一条件”。 例句 Don’t bring food unless the host asks you to.（除非主人要求，否则不要带食物。） You can’t use someone’s first name unless you know them well.（除非你很了解对方，否则不要直呼其名。） 替换示例：You can’t use someone’s first name if you don’t know them well. 3. 时间状语从句（as soon as） as soon as 表示“一……就……”，引导时间状语从句，说明两个动作紧接着发生。 核心用法 结构：as soon as + 句子，从句用一般现在时表将来，遵循“主将从现”原则。 强调动作的“即时性”，两个动作时间间隔极短。 例句 In Japan, we bow as soon as we meet a teacher.（在日本，我们一见到老师就鞠躬。） As soon as you enter someone’s home, take off your shoes.（一进入别人家里就脱鞋。） 4. 三大状语从句对比表 连词 从句类型 核心含义 时态规则 典型例句 so…that 结果状语从句 如此……以至于…… 主从句时态一致 It’s so formal that we don’t do it. unless 条件状语从句 除非；如果不 主将从现 Don’t bring food unless the host asks you to. as soon as 时间状语从句 一……就…… 主将从现 We bow as soon as we meet a teacher. 二、练习题 基础巩固 用括号内的连词合并句子 1. The custom is formal. We don’t do it these days. (so…that) 2. Don’t bring food. The host asks you to. (unless) 3. We meet a teacher. We bow. (as soon as) 4. Being late is common. You should be patient. (so…that) 5. You can use someone’s first name. You know him or her well. (unless) 用括号内所给词的适当形式填空（6-10题） 6. ___________ (as soon as) you enter the house, take off your shoes. 7. It’s ___________ (so) rude ___________ (that) you should avoid it. 8. You can’t go out ___________ (unless) you finish your homework. 9. He was ___________ (so) tired ___________ (that) he fell asleep immediately. 10. ___________ (as soon as) the storm passes, we will go out. 能力提升 单项选择 11. The custom is ___________ formal ___________ we don’t do it these days. A. so; that B. such; that C. too; to D. enough; to 12. Don’t bring food ___________ the host asks you to. A. if B. unless C. because D. when 13. ___________ we meet a teacher, we bow in Japan. A. As soon as B. Unless C. So that D. Because 14. Being late is ___________ common ___________ you should be patient. A. so; that B. such; that C. too; to D. enough; to 15. You can use his first name ___________ you know him well. A. if B. unless C. because D. though 16. ___________ you finish your work, you can leave. A. As soon as B. Unless C. So that D. Because 17. It’s ___________ a good book ___________ I want to read it again. A. so; that B. such; that C. too; to D. enough; to 18. You can’t go to the party ___________ you are invited. A. if B. unless C. because D. when 19. ___________ he arrives, we will start the meeting. A. As soon as B. Unless C. So that D. Because 20. The problem is ___________ difficult ___________ no one can solve it. A. so; that B. such; that C. too; to D. enough; to 21. You will miss the train ___________ you hurry up. A. if B. unless C. because D. when 22. ___________ I get home, I will call you. A. As soon as B. Unless C. So that D. Because 拓展挑战 句型转换 23. The custom is so formal that we don’t do it these days.（用 such…that 改写） The custom is ___________ ___________ ___________ ___________ we don’t do it these days. 24. Don’t bring food unless the host asks you to.（用 if…not 改写） Don’t bring food ___________ the host ___________ ___________ you to. 25. As soon as we meet a teacher, we bow.（对划线部分提问） ___________ ___________ you bow in Japan? 26. Being late is so common that you should be patient.（对划线部分提问） ___________ ___________ you ___________ ___________ about being late? 27. You can use his first name if you know him well.（用 unless 改写） You ___________ ___________ his first name ___________ you know him well. 语篇填空 Do you know what culture shock is? You may feel it when you experience a new culture, because the new culture is 28. ___________ different from your own 29. ___________ you feel 30. ___________ . For example, I experienced this 31. ___________I got off the plane in Peru last year. People were standing on my right and left, even though there was plenty of space on the bus! That was really 32. ___________ to me. In Germany, people usually like more personal space, and we don’t stand close to someone 33. ___________ we know them very well. But once I was used to it, I became more curious and 34. ___________ in learning about the culture there. It’s 35. ___________ interesting 36. ___________ to discover cultural differences like this! 三、答案与解析 基础巩固（1-10题） 1. The custom is so formal that we don’t do it these days. 2. Don’t bring food unless the host asks you to. 3. As soon as we meet a teacher, we bow. 4. Being late is so common that you should be patient. 5. You can’t use someone’s first name unless you know him or her well. 6. As soon as 7. so; that 8. unless 9. so; that 10. As soon as 能力提升（11-22题） 11. A（修饰形容词 formal，用 so…that） 12. B（“除非主人要求”，用 unless） 13. A（“一见到老师就鞠躬”，用 as soon as） 14. A（修饰形容词 common，用 so…that） 15. A（“如果你很了解他”，用 if；若用 unless 需改为否定） 16. A（“一完成工作就可以离开”，用 as soon as） 17. B（修饰名词短语 a good book，用 such…that） 18. B（“除非被邀请”，用 unless） 19. A（“他一到我们就开始会议”，用 as soon as） 20. A（修饰形容词 difficult，用 so…that） 21. B（“除非你快点，否则会错过火车”，用 unless） 22. A（“我一到家就给你打电话”，用 as soon as） 拓展挑战（23-35题） 句型转换（23-27题） 23. such a formal custom that 24. if; doesn’t ask 25. When do 26. What should; do 27. can’t use; unless 语篇填空（28-35题） 28. so 29. that 30. surprised 31. as soon as 32. surprising 33. unless 34. interested 35. so 36. that ( 1 ) 学科网（北京）股份有限公司 $