Unit 4～Unit 5 核心语法训练2025-2026学年人教版英语八年级下册

人教版八年级英语下册 Unit4~Unit5 核心语法训练 核心语法 Unit4：形容词/副词比较级、最高级；as…as / not as…as Unit5：情态动词 must/may/can/need；时间状语从句（when/while/until/before/after） 一、词形转换（比较级、最高级） 学科网（北京）股份有限公司 1. high → ______ → ______ 2. deep → ______ → ______ 3. wide → ______ → ______ 4. long → ______ → ______ 5. heavy → ______ → ______ 6. easy → ______ → ______ 7. lucky → ______ → ______ 8. thin → ______ → ______ 9. big → ______ → ______ 10. dangerous → ______ → ______ 11. exciting → ______ → ______ 12. wonderful → ______ → ______ 13. good → ______ → ______ 14. bad → ______ → ______ 15. much → ______ → ______ 16. little → ______ → ______ 17. far → ______ → ______ 18. fast → ______ → ______ 19. strong → ______ → ______ 20. brave → ______ → ______ 二、语法选择 （ ）1. The Yellow River is one of ______ rivers in China. A. long B. longer C. the longest D. longest （ ）2. This mountain is not ______ as that one. A. higher B. as high C. highest D. more high （ ）3. Lucy dances ______ than her sister. A. beautiful B. more beautiful C. beautifully D. more beautifully （ ）4. The ______ you practice, the ______ you will be. A. more; confident B. much; confident C. more; more confident D. many; confident （ ）5. —______ I go out to play now, Mom? —No, you ______. You must finish your homework first. A. May; mustn’t B. Can; may not C. Must; needn’t D. May; can’t （ ）6. Listen! Someone ______ in the next room. A. sing B. sings C. is singing D. sang （ ）7. He was reading a book ______ I came in. A. when B. while C. because D. though （ ）8. My brother is ______ than me. He can carry the heavy box. A. strong B. stronger C. strongest D. more strong （ ）9. You ______ walk on the wet floor. It’s dangerous. A. may B. must C. mustn’t D. needn’t （ ）10. This movie is ______ than that one. I like it better. A. interesting B. more interesting C. most interesting D. the most interesting （ ）11. —______ I use your dictionary? —Sure, you ______. A. Must; can B. May; can C. Need; must D. Can; need （ ）12. She didn’t go to bed ______ her mother came back. A. until B. when C. while D. after （ ）13. Qomolangma is ______ mountain in the world. A. high B. higher C. highest D. the highest （ ）14. The weather is getting ______ and ______ in spring. A. warm; warm B. warmer; warmer C. warm; warmer D. warmer; warm （ ）15. You ______ be quiet in the library. A. must B. may C. might D. could （ ）16. ______ it was raining, we went hiking. A. Because B. Though C. If D. When （ ）17. This bridge is ______ than that one. A. old B. older C. oldest D. the oldest （ ）18. —Must I get up early tomorrow? —No, you ______. A. mustn’t B. can’t C. needn’t D. may not （ ）19. He found it ______ than he thought. A. easy B. easier C. easiest D. more easy （ ）20. I was doing my homework ______ my father was watching TV. A. when B. while C. before D. after 三、句型转换 1. This river is very long.（改为最高级） This river is ______ ______ ______ in our country. 2. She runs fast.（改为比较级） She runs ______ than me. 3. You must finish the work today.（改为否定句） You ______ ______ finish the work today. 4. He was sleeping. The bell rang.（合并） He was sleeping ______ the bell rang. 5. This book is not as interesting as that one.（同义句） That book is ______ ______ than this one. 6. May I open the window?（否定回答） No, ______ ______. 7. The elephant is strong.（感叹句） ______ ______ the elephant is! 8. I didn’t go out. I finished my homework.（合并） I didn’t go out ______ I finished my homework. 9. She is taller than any other girl in her class.（同义句） She is ______ ______ girl in her class. 10. Must we hand in our homework now?（否定回答） No, ______ ______. 四、语法综合填空 I visited the Great Wall last week. It is one of 1.______ (great) wonders in the world. It is much 2.______ (long) than I thought. The weather was 3.______ (fine) than yesterday. While I 4.______ (walk) along the wall, I met a foreign friend. He told me the Great Wall is 5.______ (amazing) place he has ever visited. You 6.______ (must) take care when you visit it, because some parts are very steep. I didn’t leave 7.______ the sun set. I enjoyed 8.______ (I) very much. I think nature is 9.______ (wonderful) than anything else. We 10.______ (should) protect it well. 参考答案 一、词形转换 1.higher;highest 2.deeper;deepest 3.wider;widest 4.longer;longest 5.heavier;heaviest 6.easier;easiest 7.luckier;luckiest 8.thinner;thinnest 9.bigger;biggest 10.more dangerous;most dangerous 11.more exciting;most exciting 12.more wonderful;most wonderful 13.better;best 14.worse;worst 15.more;most 16.less;least 17.farther/further;farthest/furthest 18.faster;fastest 19.stronger;strongest 20.braver;bravest 二、语法选择 1.C 2.B 3.D 4.C 5.D 6.C 7.A 8.B 9.C 10.B 11.B 12.A 13.D 14.B 15.A 16.B 17.B 18.C 19.B 20.B 三、句型转换 1.the longest river 2.faster 3.don’t have to 4.when 5.more interesting 6.you can’t 7.How strong 8.until 9.the tallest 10.you needn’t 四、语法综合填空 1.the greatest 2.longer 3.finer 4.was walking 5.the most amazing 6.must 7.until 8.myself 9.more wonderful 10.should $