Unit1语法条件&原因状语从句课件2026-2027学年外研版英语九年级上册

该初中英语课件聚焦状语从句核心知识，系统讲解原因（because/since/as/for）和条件（if/unless/as long as）状语从句的概念、引导词用法、语序及时态规则，通过对比because与because of、unless与if...not等构建从基础理解到应用的学习支架。 其亮点在于融入剪纸、木偶戏等传统文化情境，结合中考真题与对比辨析题，培养学生文化意识与思维品质。采用讲练结合模式，学生能提升语言应用能力，教师可直接利用练习题高效巩固教学。

状语从句 1 一、状语从句概念 状语从句指在主从复合句中充当状语的从句，即用一个完整的句子修饰主句，补充说明时间、地点、原因、条件、目的、结果、比较、方式等信息，让句子逻辑更完整、表达更具体。 二、原因状语从句 1. because 意为 “因为”，从句说明原因，主句表结果 2. 语序一（更常用）：主句在前 + because + 从句 例句：I like paper-cutting because it's Chinese art. 语序二：Because 从句放句首，加逗号再接主句 例句：Because it's traditional, we should protect it. 3. 主从句时态必须保持一致，无特殊变化 He learns puppetry because he loves folk culture. She stayed home because she was busy yesterday. 4. because 不能和 so 连用 错误：Because arts are dying, so we protect them. 正确 1：Arts are dying, so we protect them. 正确 2：We protect arts because they are dying. 5. because vs because of because + 句子 because of + 名词、名词短语、动名词 例句 1：I love puppets because they are beautiful. 例句 2：I love puppets because of their beauty. 6. since、as、for 引导的原因状从 since “既然” ，表示已知的、显而易见的理由；位于句首 as “由于”，表示客观原因；位于句首 for 不说明直接原因，而是补充解释；只能位于句中，前加逗号 例句 1：Since everyone is here, let’s start the meeting. 例句 2：As the weather is bad, we cancel the trip. 例句3： He must be ill, for he is absent today. 三、条件状语从句 1. if “如果”，提出假设条件，主句就会出现对应结果 2. 语序一：主句在前 + if + 从句 例句：My mother will take me to the park if she is free. 语序二：If 从句放句首，加逗号再接主句 例句：If you go there, I’ll go, too. 3. 时态 从句用一般现在时，主句用一般将来时、情态动词加动原、祈使句 “主将从现、主情从现、主祈从现” If you practice, you will cut nice paper works. If we start now, we can finish it on time. If you want to get good grades, work hard. 4. unless和as long as 引导的条件状从 unless “除非（从句）...否则就（主句）...”，提出否定条件，=if...not，主将从现 as long as “只要”，提出肯定条件，主将从现 You won’t succeed if you don’t keep trying. You won’t succeed unless you keep trying. 能否加don’t？ You will succeed as long as you keep trying. 1. ____ you can use your dictionary, you will learn English better. A. If B. Unless C. Though D. Before 2.（北京中考）Don’t lose heart. If you keep working hard, you ____ some day. A. will succeed B. succeed C. succeeded D. have succeeded 3. ____ it rained hard, ____ I stayed at home. A. Because;/ B. Because;so C. Though;but D. Though;/ A A A 4. We should care more about our health ____ good health is the first step towards success. A. so B. because C. but D. if 5. —Why do you like this TV programme? —____ it’s very interesting and exciting. A. Though B. Because C. So D. But B B 1. If he ______ enough free time, he will take part in puppet shows. A. have B. has C. will have D. had 2. —Why do you love folk art? —______ it can bring back my warm childhood memories. A. If B. Because C. Unless D. When 3. You will miss the show ______ you leave right now. A. if B. because C. unless D. since 4. It’s our duty ______ the traditional art alive. A. keep B. to keep C. keeping D. kept 5. Many teenagers spend much time ______ mobile phones instead of reading. A. use B. to use C. using D. used B B A C B 6. Since everyone ______ ready for the activity, let’s start. A. is B. are C. will be D. was 7. I’m looking forward to ______ the great puppet performance. A. watch B. to watch C. watching D. watched 8. ______ you try your best, you will become a good performer. A. Unless B. If C. Because D. Though 9. He ______ get into the habit of practicing every day, or he won’t make progress. A. should B. shouldn’t C. can’t D. needn’t 10. Something ______ wrong with my puppet, so I can’t make it come to life. A. go B. goes C. will go D. going B B A C A 11. We won’t go to the show ______ we finish our volunteer work. A. if B. when C. unless D. because 12. ______ hard work makes teenagers more independent. A. Do B. Does C. Doing D. Did 13. The little boy felt less close to puppet art ______ he thought it was old-fashioned. A. so B. because C. if D. unless 14. —Why not ______ part in the school volunteer group? —Good idea! A. take B. to take C. taking D. takes 15. If you ______ your fingers, the puppet will come to life. A. move B. moves C. will move D. moved B A A C C $