Unit 4单元语法讲义（讲练结合） 2026-2027学年人教版七年级英语上册

该初中英语单元复习讲义通过对比表格和语法图表系统构建连词and/but/because的知识体系，按“功能理解-用法归纳-语境运用”递进梳理，用例句解析并列、转折、因果逻辑，突出because与so不可连用等易错点，呈现清晰知识脉络。 讲义亮点在于分层练习设计，从选词填空到短文填空覆盖基础与综合，结合“破解点”口诀培养逻辑思维与语言能力，如用and/but/because完成学校生活短文提升语境运用。自我检测清单助力学生自主复习，全题型综合检测支持教师精准分层教学。

Unit 4 · 连词 and / but / because 人教版七年级上册  ·  语法精讲 · 随堂练 · 综合检测 学习目标 · 目标一：理解并归纳连词 and、but、because 的表意功能和用法。 · 目标二：尝试使用连词 and、but、because 连接句子，使句子逻辑顺畅。 · 目标三：在语境中合理使用连词 and、but、because 进行表达，做到自然得体。 一 连词的功能与用法 1. 什么是连词？ 连词是连接 单词、短语 或 句子 的词。本单元主要学习三个连词：and、but、because。 2. 三个连词的对比 连词 功能 含义 例句 and 并列/递进 — 表示“补充另一个信息” “和、而且、并且” I have art and geography today. English is important, and my English teacher is really nice. but 转折 — 表示“两个不同的观点或情况” “但是” Biology is difficult but important. History is my favourite subject, but my sister doesn't like it. because 因果 — 表示“给出理由或原因” “因为” I like Chinese because it's fun. He doesn't like maths because it's boring to him. 三个连词的功能总结 · and → 补充另一个信息（并列/递进） · but → 表示转折（两个不同的观点） · because → 给出理由（表示原因） 3. 教材 3a 精讲 观察句子，归纳用法： · I have art and geography today. → and 连接两个并列的名词（art / geography） · English is important, and my English teacher is really nice. → and 连接两个句子，补充另一个信息 · Biology is difficult but important. → but 连接两个形容词，表示转折（difficult ↔ important） · History is my favourite subject, but my sister doesn't like it. → but 连接两个句子，表示转折 · I like Chinese because it's fun. → because 连接两个句子，表示原因（喜欢的原因是有趣） · He doesn't like maths because it's boring to him. → because 连接两个句子，表示原因（不喜欢的原因是无聊） 破解点： · 想补充信息 → 用 and · 想表达转折 → 用 but · 想解释原因 → 用 because 练习一 · 选词填空（and / but / because） 1. I like English _______________ it's very interesting. 2. She has maths _______________ science today. 3. My sister likes music, _______________ I don't. 4. He is good at sports _______________ he practices every day. 5. This book is short _______________ meaningful.（有意义的） 6. I want to go to the library, _______________ it is closed now. 7. We have art _______________ music on Friday. 8. She doesn't like maths _______________ it's too difficult. 二 教材 3b 精讲 · 句子配对 将两部分匹配成完整句子： · I have a bicycle, but I often walk to school. → 我有自行车，但我经常走路去学校。（转折） · I like to learn about IT because it's fun to learn to use computers. → 我喜欢学信息技术，因为学用电脑很有趣。（原因） · She likes to listen to music and draw pictures. → 她喜欢听音乐和画画。（并列） · He is good at English, and he often helps me with my English. → 他擅长英语，而且他经常帮我学英语。（递进） · My favourite subject is geography because I like travelling. → 我最喜欢的科目是地理，因为我喜欢旅行。（原因） · I don't like drawing, but I like my art teacher a lot. → 我不喜欢画画，但我很喜欢我的美术老师。（转折） 破解点： · 先看前后两句的 逻辑关系：并列/递进 → and；转折 → but；因果 → because · 注意 标点符号：如果连词放在两个完整句子中间，前面通常有逗号。 练习二 · 用 and / but / because 连接句子 1. I like English. My English teacher is nice. → ________________________________________________ 2. She is good at maths. She studies very hard. → ________________________________________________ 3. I want to go to the park. It is raining. →________________________________________________ 4. He likes biology. It's very interesting. → ________________________________________________ 5. My sister likes music. She likes art too. → ________________________________________________ 三 教材 3c 精讲 · 短文填空 用 and / but / because 完成短文： I love Thursday afternoons because we have a fun class then. It's biology class, and it's exciting! Miss Baker is the teacher, and she works hard to make the class interesting. I'm not good at science, but I like the class very much. We learn about different plants and animals. Sometimes it's difficult to remember all the information, but Miss Baker helps me. She's my favourite teacher because she makes everyone in the class feel special. 破解点： · “喜欢星期四下午 因为 有有趣的课” → because · “生物课，而且 很令人兴奋” → and（递进） · “不擅长科学，但是 很喜欢这门课” → but（转折） · “植物 和 动物” → and（并列） · “有时很难，但是 贝克老师帮助我” → but（转折） · “最喜欢的老师 因为 她让每个人都感到特别” → because（原因） 练习三 · 用 and / but / because 完成短文 I like my school day. I have many subjects. I like Chinese    _____  it's very interesting. I also like PE,    _____  I can play football with my friends. Maths is a little difficult,  _____    I study hard. My favourite subject is English   _____   my English teacher is very kind. We have English   _____   Chinese every day. I don't like science,  _____    I think it's boring. 四 易错点与重难点 易错点一：because 和 so 不能同时使用。 ❌ Because I like English, so I study hard. ✅ I like English, so I study hard.（用so） ✅ Because I like English, I study hard.（用because） 易错点二：but 和 although 不能同时使用。 ❌ Although she is tired, but she keeps working. ✅ She is tired, but she keeps working.（用but） ✅ Although she is tired, she keeps working.（用although） 易错点三：and 连接并列成分时，注意形式一致。 ✅ She likes reading and writing.（两个动名词） ✅ She likes to read and to write.（两个不定式） 易错点四：because 引导原因状语从句，不能单独成句。 ❌ Because it's fun.（不完整） ✅ I like it because it's fun.（完整） 易错点五：标点符号：连词连接两个完整句子时，前面加逗号。 ✅ I like English, but I don't like maths. ✅ I like English and Chinese.（连接两个名词，不加逗号） 练习四 · 改错题 1. Because I like English, so I study hard. → ________________________________________________ 2. Although she is tired, but she keeps working. → ________________________________________________ 3. I like reading and to write. →________________________________________________ 4. He doesn't like maths. Because it's boring. →________________________________________________ 5. I like English but I don't like maths. → ________________________________________________（加标点） 五 语法图表总结（必背） 三个连词的功能对比 连词 功能 中文含义 例句 and 并列 / 递进 和、而且、并且 I have art and geography. She is kind, and she helps others. but 转折 但是 Biology is difficult but important. I like it, but my sister doesn't. because 因果（原因） 因为 I like Chinese because it's fun. He is happy because he got a good grade. 连词使用口诀 and 并列递进加信息， but 转折前后不一样， because 解释原因要牢记， 三个连词用途广，逻辑顺畅靠它们！ 六 综合检测（全题型） 一、单项选择题 1. I like English _______________ it's very interesting. A. and B. but C. because D. so 2. She has art _______________ music on Friday. A. and B. but C. because D. or 3. I like maths, _______________ my sister doesn't like it. A. and B. but C. because D. so 4. He doesn't like science _______________ it's boring to him. A. and B. but C. because D. or 5. English is important, _______________ my English teacher is really nice. A. and B. but C. because D. so 6. Biology is difficult _______________ important. A. and B. but C. because D. or 7. She likes to listen to music _______________ draw pictures. A. and B. but C. because D. so 8. I don't like drawing, _______________ I like my art teacher a lot. A. and B. but C. because D. so 9. He is good at English, _______________ he often helps me. A. and B. but C. because D. or 10. My favourite subject is geography _______________ I like travelling. A. and B. but C. because D. so 二、用 and / but / because 填空 1. I like English _______________ it's very fun. 2. She has maths _______________ science today. 3. He is good at sports, _______________ he doesn't like running. 4. I want to go to the park, _______________ it is raining. 5. My sister likes music _______________ dancing. 6. He is happy _______________ he got a good grade. 7. This book is short _______________ meaningful. 8. I don't like science, _______________ I like my science teacher. 三、连词成句 1. English / I / because / like / it's / interesting / very → ________________________________________________ 2. has / art / and / music / she / today → ________________________________________________ 3. difficult / biology / important / is / but → ________________________________________________ 4. doesn't / my / like / sister / maths / it / because / boring / is →________________________________________________ 5. teacher / nice / is / my / English / and / really / is / important / English → ________________________________________________ 四、句型转换 1. I like Chinese because it's fun.（对划线部分提问） ________________________________________________ 2. She has art and music today.（改为否定句） ________________________________________________ 3. History is my favourite subject, but my sister doesn't like it.（用 although 改写） ________________________________________________ 4. He doesn't like maths because it's boring.（对划线部分提问） ________________________________________________ 5. I like English. My English teacher is really nice.（用 and 连接） ________________________________________________ 五、短文填空 My name is Li Ming. I am a student. I have many subjects at school. I like Chinese   _____   it's very interesting. I also like PE,   _____   I can play basketball with my friends. Maths is a little difficult,      _____I work hard at it. My favourite subject is English    _____  my English teacher is very kind. We have English  _____    Chinese every day. I don't like science,  _____    I think it's boring. But my science teacher is very nice,   _____   I still try my best in science class. 六、改错题 1. Because I like English, so I study hard. →________________________________________________ 2. Although she is tired, but she keeps working. → ________________________________________________ 3. I like reading and to write. → ________________________________________________ 4. He doesn't like maths. Because it's boring. → ________________________________________________ 5. I like English but I don't like maths. →________________________________________________（加标点） 6. She is good at English, because she helps me. → ________________________________________________（改正逻辑关系） 七、选词填空 从方框中选择正确的连词填空。 and / but / because I love Fridays  _____    we have art class then. Art is my favourite subject. I like drawing   _____   painting. I'm not very good at it,    _____  I enjoy it a lot. My art teacher is very kind    _____  she always encourages us. I also like music class,   _____   I don't like science class. Science is difficult    _____  I still try my best. 七 课后自我检测清单 · 我能说出 and、but、because 三个连词的表意功能。 · 我能正确使用 and 连接并列或递进的信息。 · 我能正确使用 but 表示转折关系。 · 我能正确使用 because 表示原因。 · 我能区分 because 和 so，并能避免同时使用。 · 我能用连词使句子逻辑更加顺畅。 参考答案 练习一： 1. because　2. and　3. but　4. because　5. but　6. but　7. and　8. because 练习二： 1. I like English, and my English teacher is nice.　2. She is good at maths because she studies very hard.　3. I want to go to the park, but it is raining.　4. He likes biology because it's very interesting.　5. My sister likes music and art. 练习三： ① because　② because　③ but　④ because　⑤ and　⑥ because 练习四： 1. I like English, so I study hard. / Because I like English, I study hard.　2. Although she is tired, she keeps working. / She is tired, but she keeps working.　3. I like reading and writing.　4. He doesn't like maths because it's boring.　5. I like English, but I don't like maths. 综合检测 · 一： 1. C　2. A　3. B　4. C　5. A　6. B　7. A　8. B　9. A　10. C 综合检测 · 二： 1. because　2. and　3. but　4. but　5. and　6. because　7. but　8. but 综合检测 · 三： 1. I like English because it's very interesting.　2. She has art and music today.　3. Biology is difficult but important.　4. My sister doesn't like maths because it is boring.　5. English is important, and my English teacher is really nice. 综合检测 · 四： 1. Why do you like Chinese?　2. She doesn't have art or music today.　3. Although History is my favourite subject, my sister doesn't like it. / Although my sister doesn't like History, it is my favourite subject.　4. Why doesn't he like maths?　5. I like English, and my English teacher is really nice. 综合检测 · 五： ① because　② because　③ but　④ because　⑤ and　⑥ because　⑦ so 综合检测 · 六： 1. I like English, so I study hard. / Because I like English, I study hard.　2. Although she is tired, she keeps working. / She is tired, but she keeps working.　3. I like reading and writing.　4. He doesn't like maths because it's boring.　5. I like English, but I don't like maths.　6. She is good at English, and she helps me. / She helps me because she is good at English. 综合检测 · 七： ① because　② and　③ but　④ and　⑤ but　⑥ but 人教版七上 Unit 4 · 语法讲义 学科网（北京）股份有限公司 $