Unit 6 Crossing Cultures 连词so that unless as soon as (语法讲解+分层精练）--2025-2026学年人教版八年级英语下册

Unit 6 Crossing Cultures （连词so that unless as soon as） (语法讲解+分层精练） 目 录 一、语法讲解 1 （一）核心考点速览 1 （二）语法精讲与易错警示 1 1. so...that 如此……以至于 2 2. unless 除非，如果不 2 3. as soon as 一……就…… 2 二、中考题型练习30题 3 （一）单项选择（20题） 3 （二）用所给词的适当形式填空（5题） 4 （三）句型转换（5题） 4 一、语法讲解 （一）核心考点速览 连词 含义 用法要点 常见句式 so…that 如此……以至于…… so + 形容词/副词 + that 从句； so + adj. + a/an + 单数名词 + that He is so tired that he can't walk. unless 除非，如果不（= if...not） 引导条件状语从句，主将从现； 本身含否定，从句用肯定形式 You will fail unless you work hard. as soon as 一……就…… 引导时间状语从句，主将从现； 主过从过（两个过去动作先后发生） I’ll call you as soon as I arrive. （二）语法精讲与易错警示 1. so...that 如此……以至于 （1）基本结构 · so + 形容词/副词 + that 从句：The box is so heavy that I can't carry it. · so + 形容词 + a/an + 可数名词单数 + that：She is so lovely a girl that everyone likes her.（= such a lovely girl） （2）易错点 · so修饰形容词/副词，such修饰名词（短语）。 · 与too...to（太……而不能）互换：He is so young that he can’t go to school. = He is too young to go to school. · 与...enough to互换：He is so strong that he can lift the box. = He is strong enough to lift the box. 2. unless 除非，如果不 （1）基本结构 · unless + 从句（肯定形式），主句常用将来时或情态动词 You will miss the train unless you hurry up.（= if you don't hurry up） （2）易错点 · unless = if...not，但unless不能用于“由...导致的结果不可能发生”的虚拟情况（此时用 if...not 更自然）。 · unless引导的从句遵循主将从现，从句用一般现在时表将来。 · unless 本身已是否定，从句谓语动词不可再加not（错误：unless you don’t work hard）。 3. as soon as 一……就…… （1）基本结构 · as soon as + 从句（一般现在时），主句一般将来时（主将从现） I will tell him the news as soon as I see him. · as soon as + 从句（一般过去时），主句一般过去时（主过从过） He left as soon as he heard the news. （2）易错点 · 主句用祈使句时，从句也用一般现在时：Please call me as soon as you get there. · as soon as 强调两个动作几乎同时发生，不可与瞬间动词完成式混淆。 二、中考题型练习30题 （一）单项选择（20题） 1. （2019 河南）The boy is ________ young ________ he can’t look after himself well. A. so; that B. such; that C. too; to D. enough; to 2. （2018 北京）You will never progress ________ you face the difficulties bravely. A. if B. unless C. as soon as D. so that 3. （2020 武汉）—When will you give the book back to me? —________ I finish reading it. A. Until B. As soon as C. Unless D. So that 4. （2018 广州）The movie was ________ moving ________ many people cried. A. so; that B. such; that C. too; to D. enough; to 5. （2019 重庆）________ you keep trying, you will never achieve your dream. A. If B. Unless C. Because D. So 6. （2018 安徽）I will call you ________ I get to the airport. A. since B. as soon as C. unless D. although 7. （2020 杭州）She is ________ a lovely girl ________ everyone likes her. A. so; that B. such; that C. too; to D. as; as 8. （2018 南京）—I’m afraid I can't pass the exam. —You won’t pass ________ you work harder. A. if B. unless C. when D. after 9. （2019 天津）The math problem is ________ difficult ________ nobody in our class can work it out. A. too; to B. so; that C. enough; to D. as; as 10. （2018 江西）________ she heard the funny story, she laughed happily. A. As soon as B. Unless C. So D. Although 11. （2019 河北）My grandfather is ________ old that he can't walk fast. A. so B. very C. too D. quite 12. （2018 哈尔滨）I won’t go to the party ________ I am invited. A. if B. unless C. when D. because 13. （2020 济南）The boy ran ________ fast ________ I couldn't catch up with him. A. so; that B. such; that C. too; to D. very; that 14. （2018 长沙）We will have a picnic ________ it doesn’t rain tomorrow. A. if B. unless C. as soon as D. so that 15. （2019 沈阳）________ you go, I will miss you forever. A. Wherever B. Whatever C. However D. Whenever 16. （2018 兰州）________ the rain stops, we can go out to play. A. As soon as B. Unless C. So D. Because 17. （2020 成都）You should tell the police ________ you see any suspicious people. A. as soon as B. so that C. unless D. while 18. （2019 昆明）The box is ________ heavy ________ nobody can move it. A. too; to B. so; that C. enough; to D. such; that 19. （2018 西宁）I will stay with you ________ you need me. A. as soon as B. so that C. unless D. as long as 20. （2019 长春）—Why did you come back so early? —________ I had finished my work. A. As soon as B. Unless C. So D. Because （二）用所给词的适当形式填空（5题） 21. I will tell him the news as soon as he ________ (come) back. 22. You won’t catch the early bus unless you ________ (get) up early. 23. The problem is so difficult that nobody ________ (be) able to solve it. 24. She ________ (leave) the room as soon as she saw the mouse. 25. ________ he is very busy, he still helps me with my math. （用 although/unless 填空） （三）句型转换（5题） 26. He is so young that he can't go to school. （改为同义句，用 too...to） 27. If you don’t study hard, you will fail the exam. （改为同义句，用 unless） 28. I will call you immediately when I arrive in Beijing. （改为同义句，用 as soon as） 29. The girl was so beautiful that everyone liked her. （改为简单句，用 enough to） 30. The boy is such a clever boy that he can work out the problem. （改为同义句，用 so...that） 1 学科网（北京）股份有限公司 $ Unit 6 Crossing Cultures （连词so that unless as soon as） (语法讲解+分层精练） 目 录 一、语法讲解 1 （一）核心考点速览 1 （二）语法精讲与易错警示 2 1. so...that 如此……以至于 2 2. unless 除非，如果不 2 3. as soon as 一……就…… 2 二、中考题型练习30题 3 （一）单项选择（20题） 3 （二）用所给词的适当形式填空（5题） 5 （三）句型转换（5题） 5 一、语法讲解 （一）核心考点速览 连词 含义 用法要点 常见句式 so…that 如此……以至于…… so + 形容词/副词 + that 从句； so + adj. + a/an + 单数名词 + that He is so tired that he can't walk. unless 除非，如果不（= if...not） 引导条件状语从句，主将从现； 本身含否定，从句用肯定形式 You will fail unless you work hard. as soon as 一……就…… 引导时间状语从句，主将从现； 主过从过（两个过去动作先后发生） I’ll call you as soon as I arrive. （二）语法精讲与易错警示 1. so...that 如此……以至于 （1）基本结构 · so + 形容词/副词 + that 从句：The box is so heavy that I can't carry it. · so + 形容词 + a/an + 可数名词单数 + that：She is so lovely a girl that everyone likes her.（= such a lovely girl） （2）易错点 · so修饰形容词/副词，such修饰名词（短语）。 · 与too...to（太……而不能）互换：He is so young that he can’t go to school. = He is too young to go to school. · 与...enough to互换：He is so strong that he can lift the box. = He is strong enough to lift the box. 2. unless 除非，如果不 （1）基本结构 · unless + 从句（肯定形式），主句常用将来时或情态动词 You will miss the train unless you hurry up.（= if you don't hurry up） （2）易错点 · unless = if...not，但unless不能用于“由...导致的结果不可能发生”的虚拟情况（此时用 if...not 更自然）。 · unless引导的从句遵循主将从现，从句用一般现在时表将来。 · unless 本身已是否定，从句谓语动词不可再加not（错误：unless you don’t work hard）。 3. as soon as 一……就…… （1）基本结构 · as soon as + 从句（一般现在时），主句一般将来时（主将从现） I will tell him the news as soon as I see him. · as soon as + 从句（一般过去时），主句一般过去时（主过从过） He left as soon as he heard the news. （2）易错点 · 主句用祈使句时，从句也用一般现在时：Please call me as soon as you get there. · as soon as 强调两个动作几乎同时发生，不可与瞬间动词完成式混淆。 二、中考题型练习30题 （一）单项选择（20题） 1. （2019 河南）The boy is ________ young ________ he can’t look after himself well. A. so; that B. such; that C. too; to D. enough; to 答案：A 解析：句意“这个男孩如此小以至于不能照顾好自己”。so...that 如此……以至于；such...that 修饰名词；too...to 太……而不能，后跟动词原形；此处是从句，故用 so...that。 2. （2018 北京）You will never progress ________ you face the difficulties bravely. A. if B. unless C. as soon as D. so that 答案：B 解析：句意“除非你勇敢面对困难，否则永远不会进步”。unless = if not，引导条件状语从句。 3. （2020 武汉）—When will you give the book back to me? —________ I finish reading it. A. Until B. As soon as C. Unless D. So that 答案：B 解析：答语“我一读完就还给你”，用 as soon as 表示“一……就……”。 4. （2018 广州）The movie was ________ moving ________ many people cried. A. so; that B. such; that C. too; to D. enough; to 答案：A 解析：moving 是形容词，用 so...that 结构。 5. （2019 重庆）________ you keep trying, you will never achieve your dream. A. If B. Unless C. Because D. So 答案：B 解析：“除非你不断尝试，否则你永远无法实现梦想”。unless 符合逻辑。 6. （2018 安徽）I will call you ________ I get to the airport. A. since B. as soon as C. unless D. although 答案：B 解析：“我一到机场就给你打电话”，用 as soon as。 7. （2020 杭州）She is ________ a lovely girl ________ everyone likes her. A. so; that B. such; that C. too; to D. as; as 答案：B 解析：girl 是名词，such a lovely girl = so lovely a girl，题干中是 such...that 结构。 8. （2018 南京）—I’m afraid I can't pass the exam. —You won’t pass ________ you work harder. A. if B. unless C. when D. after 答案：B 解析：“你不会通过，除非你更努力”。unless 引导条件状语从句。 9. （2019 天津）The math problem is ________ difficult ________ nobody in our class can work it out. A. too; to B. so; that C. enough; to D. as; as 答案：B 解析：difficult 是形容词，后跟从句，so...that 正确。 10. （2018 江西）________ she heard the funny story, she laughed happily. A. As soon as B. Unless C. So D. Although 答案：A 解析：“她一听到这个有趣的故事就开心地笑了”，两个动作几乎同时发生，用 as soon as。 11. （2019 河北）My grandfather is ________ old that he can't walk fast. A. so B. very C. too D. quite 答案：A 解析：so...that 固定搭配，so 后接形容词。 12. （2018 哈尔滨）I won’t go to the party ________ I am invited. A. if B. unless C. when D. because 答案：B 解析：“我不会去聚会，除非我被邀请”。unless = if...not。 13. （2020 济南）The boy ran ________ fast ________ I couldn't catch up with him. A. so; that B. such; that C. too; to D. very; that 答案：A 解析：fast 是副词，so...that 结构。 14. （2018 长沙）We will have a picnic ________ it doesn’t rain tomorrow. A. if B. unless C. as soon as D. so that 答案：A 解析：根据句意“如果明天不下雨”，用 if。注意 unless = if not，代入意为“除非明天下雨”，与句意不符。 15. （2019 沈阳）________ you go, I will miss you forever. A. Wherever B. Whatever C. However D. Whenever 答案：A 解析：本题考察让步状语从句，与 unless/as soon as 无关，但为展示中考题型保留。正确答案 A（无论你去哪里）。 16. （2018 兰州）________ the rain stops, we can go out to play. A. As soon as B. Unless C. So D. Because 答案：A 解析：“雨一停，我们就可以出去玩”，as soon as 符合句意。 17. （2020 成都）You should tell the police ________ you see any suspicious people. A. as soon as B. so that C. unless D. while 答案：A 解析：“一看到可疑人员就报警”，as soon as 正确。 18. （2019 昆明）The box is ________ heavy ________ nobody can move it. A. too; to B. so; that C. enough; to D. such; that 答案：B 解析：heavy 是形容词，后跟从句，so...that。 19. （2018 西宁）I will stay with you ________ you need me. A. as soon as B. so that C. unless D. as long as 答案：D 解析：本题意为“只要你需要我，我就陪你”，as long as 引导条件状语从句。unless 意为“除非”，不合逻辑。 20. （2019 长春）—Why did you come back so early? —________ I had finished my work. A. As soon as B. Unless C. So D. Because 答案：D 解析：问原因，答语用 because。本题干扰项为 as soon as，但语义不符。 （二）用所给词的适当形式填空（5题） 21. I will tell him the news as soon as he ________ (come) back. 答案：comes 解析：as soon as 引导时间状语从句，主句将来时，从句用一般现在时表将来。he 三单，come 加 s。 22. You won’t catch the early bus unless you ________ (get) up early. 答案：get 解析：unless 引导条件状语从句，主句将来时，从句用一般现在时。主语 you，用 get。 23. The problem is so difficult that nobody ________ (be) able to solve it. 答案：is 解析：so...that 从句中，主语 nobody 视为三单，时态与主句一致，主句 is 一般现在时，从句也用一般现在时。 24. She ________ (leave) the room as soon as she saw the mouse. 答案：left 解析：as soon as 描述过去动作，主过从过，saw 是过去式，主句也用一般过去时。 25. ________ he is very busy, he still helps me with my math. （用 although/unless 填空） 答案：Although 解析：句意“尽管他很忙，他仍然帮我学数学”，让步状语从句用 although。 （三）句型转换（5题） 26. He is so young that he can't go to school. （改为同义句，用 too...to） 答案：He is too young to go to school. 27. If you don’t study hard, you will fail the exam. （改为同义句，用 unless） 答案：You will fail the exam unless you study hard. 28. I will call you immediately when I arrive in Beijing. （改为同义句，用 as soon as） 答案：I will call you as soon as I arrive in Beijing. 29. The girl was so beautiful that everyone liked her. （改为简单句，用 enough to） 答案：The girl was beautiful enough for everyone to like her. （注：原句主语不同，改为简单句可用 for sb. to do 结构） 30. The boy is such a clever boy that he can work out the problem. （改为同义句，用 so...that） 答案：The boy is so clever a boy that he can work out the problem. 1 学科网（北京）股份有限公司 $