Unit 1 Spring is coming 单元语法专项-【绿卡初中创新题】2025-2026学年八年级下册英语习题课件(冀教版·新教材)河北专版

该初中英语单元复习课件系统梳理了when、while、as引导的时间状语从句及because引导的原因状语从句，通过语法归纳、例句解析及注意事项，将引导词用法、动作关系、时态搭配等核心内容串联，帮助学生构建完整的状语从句知识体系。 其亮点在于采用“语法归纳-例句示范-分层练习”的复习策略，如通过用括号内单词适当形式填空、选择引导词、合并句子等多样化练习，培养学生的语言理解与表达能力及逻辑思维品质。分层设计让不同水平学生巩固知识，教师可依托练习精准把握学情，提升复习效率。

Unit 1　 Spring is coming! 单元语法专项 2 练语法 目 录 3 语法归纳　when、while和as引导的时间状语从句以及because引导的原因状语从句 　　常见的时间状语从句的引导词有when、while和as，它们都有“当……的时候”之意。 一、when、while和as引导的时间状语从句 目 录 导 航 二 三 一 四 五 目 录 导 航 二 三 一 四 五 注意：（1）表示主句动作和从句动作同时发生时，as从句通常用一般现在时，while从句可以用一般现在时或现在进行时。 （2）从句动作和主句动作同时发生，且从句谓语动词为延续性动词时，when、while、as可互换。 （3）主句动作和从句动作都发生在将来时，when从句通常用一般现在时。 （4）如果when、while引导的从句的主语与主句主语相同，而从句的谓语又有be，从句中的主语和be可以省略，但as从句一般不这样用。 *I felt a little afraid when/while （I was） on the plane.（I was可以省略） *When/While （he is） reading, he falls asleep.（he is可以省略） 目 录 导 航 二 三 一 四 五 二、because引导的原因状语从句 目 录 导 航 二 三 一 四 五 练语法 一、用括号内所给单词的适当形式填空 1. When she ________（get） home, her mother is cooking dinner. 2. When the teacher ________（come） in, the students stopped talking. 3. Some students ____________（pick） strawberries while others are watering vegetables. 4. He always takes notes carefully while ________（read） a book. 5. I like spring best because it ________（be） a season full of life. gets came are picking reading is 目 录 导 航 二 三 一 四 五 8 6. Peter likes reading a newspaper ________ he is having breakfast.（because/while） 7. ________ time goes by, we get to know every person is unique.（As/While） 8. All the students stood up ________ the teacher walked into the classroom.（but/when） 9. Tina put on her sunglasses ________ the sun was so bright.（so/because） 10. Yesterday afternoon we didn’t go out __________ the rain.（because/because of） 二、从括号中选择适当的词语填空 while As when because because of 目 录 导 航 二 三 一 四 五 9 11. I didn’t go to school yesterday because I was ill.（对画线部分提问） ________ ________ you ________ to school yesterday？ 12. I visited Tangshan for the first time when I was six years old.（对画线部分提问） ________ ________ you ________ Tangshan for the first time？ 13. My brother takes many photos while travelling.（还原句中省略的成分） My brother takes many photos while ________ ________ travelling. 三、按要求完成句子，每空一词 Why didn’t go When did visit he is 目 录 导 航 二 三 一 四 五 10 14. （保定定州期中改编）The water turned into ice because it was cold.（改为同义句） The water turned into ice ________ ________ the cold weather. 15. Jane didn’t arrive on time because she missed the bus.（改为同义句） Jane missed the bus. ________ ________ _____ _______ ________ ________ , she didn’t arrive on time. because of As a result / Because of it 目 录 导 航 二 三 一 四 五 11 16. The kids are dancing. The teacher is singing.（用while引导） ________________________________________________________ 17. He didn’t pass the exam. He didn’t work hard.（用because引导） ________________________________________________________ 18. Han Lin walks in. I am reading a book.（用while引导） ________________________________________________________ 19. Someone needs help. What should you do then？（用when引导） ________________________________________________________ 20. She carried on with the study. Then she learned more about plants.（用as引导） ________________________________________________________ 四、按要求将简单句合并为含状语从句的句子 The kids are dancing while the teacher is singing. He didn’t pass the exam because he didn’t work hard. Han Lin walks in while I am reading a book. What should you do when someone needs help? As she carried on with the study, she learned more about plants. 目 录 导 航 二 三 一 四 五 12 五、用when、while、as、because或so完成短文 　　微语段 It was 9:30 a.m. My sister was in her bedroom 21. ________ someone phoned her. It was Lily, one of her good friends. Lily asked, “What are you and your sister doing？” My sister answered, “I’m cleaning my bedroom 22. ________ my sister is washing clothes. I often help with housework in my free time 23. ________ I think every family member has the duty to share the work.” I agree with my sister. It’s great fun to share housework with family members, 24. ________ I often do it together with my sister. That’s a great part of our family time. 25. ________ I grow older, these life skills will help me live a better life. when while because so As 目 录 导 航 二 三 一 四 五 14 $