Unit 5 Music speaks 语法篇（原因状语从句）（“导”与“练”）-2026-2027学年九年级英语上册导练测同步（译林版2024）

该初中英语知识清单系统梳理了状语从句尤其是原因状语从句的知识体系。从整体感知状语从句的九类连接词入手，聚焦because、for、since、as引导的原因状语从句，明确其语气程度、主从句位置及用法差异，构建从一般到特殊的学习支架。 知识链路通过对比表格呈现连接词语气强弱与用法规则，辅以典型例句和“because与so不可连用”等特别提醒。注重语言能力培养，通过例句强化理解与表达，通过对比分析提升思维品质，帮助学生系统掌握原因状语从句，形成结构化学习策略。

Unit 5 Music speaks 语法篇 关于“because和for引导的原因状语从句”语法内容，教材如是说： 原因状语从句是指在复合句中表示主句动作发生原因的句子。我们可以用 because和for引导原因状语从句。如： I did not go to school yesterday because I was ill.我昨天没去上学，因为我生病了。 Because it was raining, we had to stay at home.因为下雨，我们只好待在家里。 The kids were excited about his arrival, for he would bring them some New Year presents. 孩子们为他的到来而兴奋，因为他将给他们带些新年礼物。 注意：because引导的原因状语从句可以位于主句之前，也可位于主句之后。如果从句在前，从句与 主句之间要用逗号隔开；for 引导的原因状语从句位于主句之后。 ◆ because意思是“因为”，表示动作发生的直接原因，语气很强，常用来回答why引导的疑问句。for意思是“因为，由于”，比because正式，语气比because弱，一般不用于回答why引导的问题，可用于正式或文学性的书面语中。如： —Why didn’t he go with us today?他为什么今天没跟我们一起去？ —Because he was too tired.因为他太累了。 He must start planning now, for the future may bring unexpected changes. 他必须现在就开始计划，因为未来可能会有无法预料的变化。 ◆汉语里我们习惯说“因为……所以……”，但使用英语时不能将because与so连用。如： Because my bike was broken, I went to school by bus yesterday. (✓) Because my bike was broken, so I went to school by bus yesterday. (✗) 关于“since和as引导的原因状语从句”语法内容，教材如是说： 我们也可以用since和as引导原因状语从句。如： Since China’s high-speed railway reaches more and more cities, it’s easier for people to travel around now.由于中国通高铁的城市越来越多，如今人们出行更方便了。 As you were not there, I left a message.因为你不在那里，所以我留言了。 注意：和because相比，since和as的语气稍弱。 ◆ since意思是“既然，由于，因为”，表示已知的、显然的理由，较正式，多位于句首。如： Since it is late, I shall go home right now.(由于)时间不早了，我得马上回家。 ◆ as和since的用法大体相同，表示附带说明的双方已知的原因。如： As it is raining, you’d better take a taxi.既然在下雨，你最好乘出租车。 一、整体感知状语从句 序号 从句类别 连接词 1 ①when, whenever, while, as, before, after, since, till, until ②as soon as, hardly/scarcely/barely…when, no sooner…than 某些副词、名词短语所引导的时间状语从句：immediately, the moment(以上都表示一……就……), each time(每次), every time(每次), the next time(下次), by the time(到……时候为止) 2 where, wherever 3 because, since, as, for 4 so that, in order that 5 so…that, such…that 6 if, unless, once, as/so long as 7 ①although, though, while, even though, even if ②疑问词+ever, no matter+疑问词 ③whether ... or ... 8 as, as if, as though 9 as … as…, than…, the +比较级……, the +比较级…… 二、原因状语从句详解 连词 语气程度 用法及注意点 主从句位置 例句 because 最强 He didn’t come to school yesterday because he was ill.他昨天没来上学， 。 Because it was raining, we had to stay at home. ，我们只好待在家里。 —Why are you late? —Because I missed the bus. 特别提醒 ①because不能和so同时使用：❌ Because I was ill, so I stayed at home. ✅ Because I was ill, I stayed at home. ✅ I was ill, so I stayed at home. ②because of +名词/动词-ing： He was late because of the rain.=He was late because it rained. She felt sad because of losing her new watch.=She felt sad because she lost her new watch. ③唯一能够被only/just修饰的词： Don’t give up just because you have some difficulties. I agreed to help him only because he was in great trouble. ④That is because…那就是因为……(后面接原因)： He was late. That is because he missed the bus. ⑤That is why…那就是为什么……(后面接结果)： He missed the bus. That is why he was late. ⑥The reason +why定语从句… is+that表语从句：why从句说结果/现象，that从句说原因 The reason why he was late is that he missed the bus. for 最弱 The ground is wet, for it rained last night.地面是湿的， 。 since 较强 Since everybody is here, let’s begin our meeting. ，我们就开会吧。 You’d better take an umbrella, since it is going to rain.你最好带上伞， 。 as 较弱 As it was late, we decided to go home. ，我们决定回家。 We had to walk home, as there were no buses.我们只好步行回家， 。 第 1 页 共 1 页 学科网（北京）股份有限公司 $ Unit 5 Music speaks 语法篇 (满分50分，答题时间45分钟) 一、单项选择(每题1分，满分15分) 1. —Why do you always download music from that particular website? —________ it offers a wide range of free songs in high quality. A. As B. For C. Because D. Since 2. She didn’t walk so fast ________ she was sure nobody was following her. A. that B. since C. until D. so 3. —She may need some help ________ she’s new here. —Let’s help her as much as possible. A. though B. unless C. while D. as 4. Music has no borders, ________ it can connect people all over the world. A. as B. for C. while D. when 5. You can’t write “Although…, but…” in one sentence, ________ the two words repeat meaning. A. so B. since C. because D. though 6. ________ her parents both work in an orchestra, the little girl has had easy access to various musical instruments since she was a baby. A. Though B. As C. Unless D. Until 7. ________ I am a big fan of classical music, I was very excited to attend the concert. A. Since B. Although C. So D. But 8. He didn’t come to school ________ he was ill. A. because B. since C. as D. for 9. —What makes you so happy, Tom? —________ I got an “A” in the English test. A. Because B. Since C. As D. For 10. ________ the problem is very difficult, we need to discuss it carefully in groups. A. As B. For C. Though D. If 11. I can’t go to work not ________ the bad weather, but ________ I am too tired. A. because of, because B. because of, because of C. because, because of D. because, because 12. The reason ________ they succeeded ________ they worked hard. A. why, is that B. why, is because C. that, is that D. because, is 13. Many people fail just ________ they give up hope before success arrives. A. since B. because C. because of D. as 14. ________ my grandpa exercises every day, ________ he is very healthy. A. Because, so B. As, so C. Because, / D. Since, and 15. —________ nicknames(绰号)are seen as a form of showing no respect for others, next time you want to call someone by his/her nickname, weigh(权衡)it before you do. —No wonder Tom doesn’t talk with me, ________ he is always angry with me. I won’t call his nickname any more. A. Because of, for B. Because, since C. As, because of D. Since, for 二、选词填空(每题1.5分，满分15分) 用 because, because of, as或since, for填空(可以重复选用) 1. Mary missed the train ________  she arrived late at the railway station. 2. ________ we live near the natatorium (游泳馆), we often go swimming in summer. 3. You can’t work out the Maths problem now. That’s  ________  you didn’t listen to your teacher carefully. 4. —Why does she look so tired these days? —She has to work hard ________  the test. 5. According to scientists, playing an instrument is helpful to teenagers, ________ it improves brain power, memory and confidence. 6. Sandy loves listening to light music, ________ it is relaxing. 7. Many people are homeless ________ the flood. 8. ________ everyone is here, let’s begin the discussion. 9. ________ the heavy rain, we had to stay in the hotel instead of going out. 10. I was really excited to go to the classical concert, ________ I am a big fan of classical music. 三、句型转换(每题2分，满分10分) 1. He didn’t attend the concert because of the heavy rain.(改为同义句) He didn’t attend the concert __________________________. 2. It rained heavily. We had to stay at home.(用since合并) _______________________________________________. 3. I feel tired lately because I stay up late.(用why表语从句改写) I stay up late. ______________________________. 4. Carlson didn’t come to the party. He was busy.(合并为一句) ________________________________________________. 5. The girl joined the music club. She loves music very much.(用as合并句子) ___________________________________________________________ . 四、句子翻译(每题2分，满分10分) 1. 由于大雪, 我们被迫缩短(cut ... short)了行程。 ___________________________________________________________ 2. 植树很重要，因为树木是地球的肺。 __________________________________________________________ 3. 既然你喜欢流行音乐，你可以加入音乐俱乐部。 ________________________________________________________________ 4. 昨天晚上他没有看电影，那是因为他不得不帮助他的妹妹做作业。 He did not see the film last night. __________________________________________ 5.由于你没有接我的电话，所以我在微信上留言了。 __________________________________________________________ 第 1 页 共 1 页 学科网（北京）股份有限公司 $ Unit 5 Music speaks 语法篇 关于“because和for引导的原因状语从句”语法内容，教材如是说： 原因状语从句是指在复合句中表示主句动作发生原因的句子。我们可以用 because和for引导原因状语从句。如： I did not go to school yesterday because I was ill.我昨天没去上学，因为我生病了。 Because it was raining, we had to stay at home.因为下雨，我们只好待在家里。 The kids were excited about his arrival, for he would bring them some New Year presents. 孩子们为他的到来而兴奋，因为他将给他们带些新年礼物。 注意：because引导的原因状语从句可以位于主句之前，也可位于主句之后。如果从句在前，从句与 主句之间要用逗号隔开；for 引导的原因状语从句位于主句之后。 ◆ because意思是“因为”，表示动作发生的直接原因，语气很强，常用来回答why引导的疑问句。for意思是“因为，由于”，比because正式，语气比because弱，一般不用于回答why引导的问题，可用于正式或文学性的书面语中。如： —Why didn’t he go with us today?他为什么今天没跟我们一起去？ —Because he was too tired.因为他太累了。 He must start planning now, for the future may bring unexpected changes. 他必须现在就开始计划，因为未来可能会有无法预料的变化。 ◆汉语里我们习惯说“因为……所以……”，但使用英语时不能将because与so连用。如： Because my bike was broken, I went to school by bus yesterday. (✓) Because my bike was broken, so I went to school by bus yesterday. (✗) 关于“since和as引导的原因状语从句”语法内容，教材如是说： 我们也可以用since和as引导原因状语从句。如： Since China’s high-speed railway reaches more and more cities, it’s easier for people to travel around now.由于中国通高铁的城市越来越多，如今人们出行更方便了。 As you were not there, I left a message.因为你不在那里，所以我留言了。 注意：和because相比，since和as的语气稍弱。 ◆ since意思是“既然，由于，因为”，表示已知的、显然的理由，较正式，多位于句首。如： Since it is late, I shall go home right now.(由于)时间不早了，我得马上回家。 ◆ as和since的用法大体相同，表示附带说明的双方已知的原因。如： As it is raining, you’d better take a taxi.既然在下雨，你最好乘出租车。 一、整体感知状语从句 序号 从句类别 连接词 1 时间状语从句 ①when, whenever, while, as, before, after, since, till, until ②as soon as, hardly/scarcely/barely…when, no sooner…than 某些副词、名词短语所引导的时间状语从句：immediately, the moment(以上都表示一……就……), each time(每次), every time(每次), the next time(下次), by the time(到……时候为止) 2 地点状语从句 where, wherever 3 原因状语从句 because, since, as, for 4 目的状语从句 so that, in order that 5 结果状语从句 so…that, such…that 6 条件状语从句 if, unless, once, as/so long as 7 让步状语从句 ①although, though, while, even though, even if ②疑问词+ever, no matter+疑问词 ③whether ... or ... 8 方式状语从句 as, as if, as though 9 比较状语从句 as … as…, than…, the +比较级……, the +比较级…… 二、原因状语从句详解 连词 语气程度 用法及注意点 主从句位置 例句 because 最强 表示动作发生的直接原因，用来回答why引导的疑问句(for, since和as都不可以这样用)。 主句之后； 主句之前(主从句要用逗号隔开)。 He didn’t come to school yesterday because he was ill.他昨天没来上学，因为他生病了。 Because it was raining, we had to stay at home.因为下雨，我们只好待在家里。 —Why are you late? 你为什么迟到？ —Because I missed the bus. 因为我错过了公交车。 特别提醒 ①because不能和so同时使用：❌ Because I was ill, so I stayed at home. ✅ Because I was ill, I stayed at home. ✅ I was ill, so I stayed at home. ②because of +名词/动词-ing： He was late because of the rain.=He was late because it rained.他迟到是因为下雨。 She felt sad because of losing her new watch.=She felt sad because she lost her new watch. 她伤心是因为弄丢了新手表。 ③唯一能够被only/just修饰的词： Don’t give up just because you have some difficulties. 不要仅仅因为遇到一些困难就放弃。 I agreed to help him only because he was in great trouble. 我同意帮他，只是因为他处境十分困难。 ④That is because…那就是因为……(后面接原因)： He was late. That is because he missed the bus.他迟到了。那是因为他错过了公交车。 ⑤That is why…那就是为什么……(后面接结果)： He missed the bus. That is why he was late.他错过了公交车。那就是他为什么迟到的原因。 ⑥The reason +why定语从句… is+that表语从句：why从句说结果/现象，that从句说原因 The reason why he was late is that he missed the bus.他迟到的原因是他错过了公交车。 for 最弱 表示补充说明的原因。 只能放在主句之后，主从句要用逗号隔开。 The ground is wet, for it rained last night.地面是湿的，因为昨晚下过雨。 since 较强 表示已知、显然的原因。 常常放在主句之前，也可放在主句之后。主从句用逗号隔开。 Since everybody is here, let’s begin our meeting.既然大家都到了，我们就开会吧。 You’d better take an umbrella, since it is going to rain.你最好带上伞，因为快要下雨了。 as 较弱 表示附带说明的原因。 常常放在主句之前，也可放在主句之后。主从句用逗号隔开。 As it was late, we decided to go home.由于天色已晚，我们决定回家。 We had to walk home, as there were no buses.我们只好步行回家，因为没有公交车了。 第 1 页 共 1 页 学科网（北京）股份有限公司 $ Unit 5 Music speaks 语法篇 (满分50分，答题时间45分钟) 一、单项选择(每题1分，满分15分) 1. —Why do you always download music from that particular website? —________ it offers a wide range of free songs in high quality. A. As B. For C. Because D. Since 【答案】C 【解析】句意：“你为什么总是从那个特定的网站下载音乐？”“因为它提供了各种各样高质量的免费歌曲。”本题问句由why引导，只能用because引出直接原因作答，故选C。 2. She didn’t walk so fast ________ she was sure nobody was following her. A. that B. since C. until D. so 【答案】B 【解析】句意：她没有走得那么快，因为她确信没有人跟着她。that 可引导从句，在so…that…(如此…… 以至于……)结构中引导结果状语从句；since因为；until直到……为止；根据“She didn’t walk so fast”可知，因为确信没有人跟着她，所以走得很慢，前果后因，用since引导原因状语从句。本题易错选为until，not ... until意为“直到……才”，She didn’t walk so fast until…语法本身成立，只是语义逻辑不通，故选B。 3. —She may need some help ________ she’s new here. —Let’s help her as much as possible. A. though B. unless C. while D. as 【答案】D 【解析】句意：“她是新来的，可能需要一些帮助。”  “让我们尽可能多地帮助她。”though虽然，尽管，引导让步状语从句；unless除非，引导条件状语从句；while当……的时候，引导时间状语从句；as因为，引导原因状语从句。分析句子结构可知，句子“she’s new here.”是前句“She may need some help ”的原因，因此用as引导，故选D。 4. Music has no borders, ________ it can connect people all over the world. A. as B. for C. while D. when 【答案】B 【解析】句意：音乐无国界，因为它可以连接世界各地的人们。as因为，通常用来指大家已知的、显而易见的既定事实；for因为，可以放在分句之后，用来补充说明前一分句的理由；while然而，与……同时；when当……时。本句空后是对前半句“音乐无国界”结论的补充、说明原因，应用连词for，故选B。 5. You can’t write “Although…, but…” in one sentence, ________ the two words repeat meaning. A. so B. since C. because D. though 【答案】C 【解析】句意：你不能在一个句子里写“Although…, but…”，因为这两个词重复了意思。so所以；since既然；because因为；though虽然。根据句意可知，后半句是前半句不能连用的原因，表示“因为”，应用because引导原因状语从句，故选C。 6. ________ her parents both work in an orchestra, the little girl has had easy access to various musical instruments since she was a baby. A. Though B. As C. Unless D. Until 【答案】B 【解析】句意：因为她的父母都在管弦乐队工作，这个小女孩从小就能轻松接触到各种各样的乐器。Though尽管；As因为；Unless除非；Until直到。根据前后句的因果逻辑关系，此处引导原因状语从句，应填As。 7. ________ I am a big fan of classical music, I was very excited to attend the concert. A. Since B. Although C. So D. But 【答案】A 【解析】句意：因为我是古典音乐的忠实爱好者，所以能去听这场音乐会我非常激动。Since既然、因为(引导原因状语从句)；Although虽然、尽管(引导让步状语从句)；So所以(用来引出结果)；But但是(表示转折)。前句“我是古典音乐的铁杆粉丝”是后句“能去参加音乐会我很兴奋”的原因，应填Since，故选A。 8. He didn’t come to school ________ he was ill. A. because B. since C. as D. for 【答案】A 【解析】句意：他没来上学因为他生病了。because因为，用来引导原因状语从句，强调直接的因果关系；since既然，引导原因状语从句时，通常表示已知的、显而易见的原因，而不是直接原因；as因为，引导的原因通常是比较明显的，语气比“because”弱，也不是强调直接原因；for是并列连词，它引导的句子不表示直接原因，而是对前面的句子进行补充说明或提供一种推断的理由，位置通常在主句之后。本题中“he was ill” 是 “He didn’t come to school” 的直接原因，“because”语气最强，在这里最合适，故选A。 9. —What makes you so happy, Tom? —________ I got an “A” in the English test. A. Because B. Since C. As D. For 【答案】A 【解析】句意：“汤姆，什么让你这么开心？”“因为我在英语考试中得了个“A”。”Because因为；Since既然/自从；As由于/当……时；For因为。根据问句“What makes you so happy”可知是在询问开心的原因，答语是直接陈述原因，常用Because引导。Since和As表示原因时语气较弱，常表示已知的原因；For表示原因时不置于句首，故选A。 10. ________ the problem is very difficult, we need to discuss it carefully in groups. A. As B. For C. Though D. If 【答案】A 【解析】句意：因为这个问题非常难，我们需要分组仔细讨论。As因为；For因为(用于并列句，补充说明)；Though虽然；If如果。根据句意，前后句为因果关系，应用As引导原因状语从句，应填As。for引导的从句不能置于主句前面，故选A。 11. I can’t go to work not ________ the bad weather, but ________ I am too tired. A. because of, because B. because of, because of C. because, because of D. because, because 【答案】A 【解析】句意：我不能去上班，不是因为糟糕的天气，而是因为我太累了。because of因为，后接名词或代词；because因为，后接从句。第一空，后接名词短语“the bad weather”，应用because of。第二空，后接句子“I am too tired”，应用because，故选A。 12. The reason ________ they succeeded ________ they worked hard. A. why, is that B. why, is because C. that, is that D. because, is 【答案】A 【解析】句意：他们成功的原因是他们努力工作。第一空先行词是The reason，从句结构完整，应用why引导定语从句；第二空构成固定句型The reason... is that...，表语从句应用that引导，不能用because，故选A。 13. Many people fail just ________ they give up hope before success arrives. A. since B. because C. because of D. as 【答案】B 【解析】句意：许多人失败只是因为在成功到来之前他们放弃了希望。考查原因连词与介词短语辨析。because of 因为，后接名词、代词或动名词；because 因为，后接完整从句，可构成固定搭配 just because(只是因为)；since 既然、由于，侧重已知理由，一般不与 just 连用；as 由于，语气较弱，常置于句首。空格后为完整句子 “they give up hope before success arrives”，且前面有just，应用 because，故选B。 14. ________ my grandpa exercises every day, ________ he is very healthy. A. Because, so B. As, so C. Because, / D. Since, and 【答案】C 【解析】句意：因为我的爷爷每天锻炼，所以他非常健康。Because因为；so所以；As由于；Since既然；and和。英语中表示原因的连词与表示结果的连词不能在同一句中连用，根据句意可知，前句是原因，后句是结果，应用Because引导原因状语从句，主句前不需要连词，故选C。 15. —________ nicknames(绰号)are seen as a form of showing no respect for others, next time you want to call someone by his/her nickname, weigh(权衡)it before you do. —No wonder Tom doesn’t talk with me, ________ he is always angry with me. I won’t call his nickname any more. A. Because of, for B. Because, since C. As, because of D. Since, for 【答案】D 【解析】句意：“由于绰号被视为不尊重他人的一种形式，下次你想用别人的绰号称呼他/她时，请先权衡利弊。”“难怪汤姆不和我说话，因为他总是生我的气。我再也不叫他的绰号了。”because of因为，后常跟名词、代词或动名词；because、as、since引导原因状语从句，for是并列连词，引导并列分句表示原因。第一空后面是完整句子，排除A选项。第二空后面也是完整句子，排除C选项。第二空位于主句后面，且空前有逗号，用for补充原因，since表原因时通常放在句首，故选D。 二、选词填空(每题1.5分，满分15分) 用 because, because of, as或since, for填空(可以重复选用) 1. Mary missed the train ________  she arrived late at the railway station. 2. ________ we live near the natatorium (游泳馆), we often go swimming in summer. 3. You can’t work out the Maths problem now. That’s  ________  you didn’t listen to your teacher carefully. 4. —Why does she look so tired these days? —She has to work hard ________  the test. 5. According to scientists, playing an instrument is helpful to teenagers, ________ it improves brain power, memory and confidence. 6. Sandy loves listening to light music, ________ it is relaxing. 7. Many people are homeless ________ the flood. 8. ________ everyone is here, let’s begin the discussion. 9. ________ the heavy rain, we had to stay in the hotel instead of going out. 10. I was really excited to go to the classical concert, ________ I am a big fan of classical music. 【答案】 1. because  2. Since/As  3. because  4. because of  5. for  6. for  7. because of  8. As/Since  9. Because of  10. for 1. 句意：玛丽错过了火车，因为她到火车站晚了。空格后为完整句子，是错过火车直接、根本性的原因，语气最强，使用because引导原因状语从句。 2. 句意：由于我们住在游泳馆附近，夏天我们经常去游泳。设空位于句首，引出双方已知的客观背景原因，Since或As均可，句首首字母大写。 3. 句意：你现在解不出这道数学题。那是因为你没有认真听老师讲课。That’s because…为固定句型，意为 “那是因为……”，后接表语从句。 4. 句意：“为什么她这些天看起来很累？”“因为考试，她必须努力学习。”空格后是名词短语the test，并非完整句子，because of为介词短语，后接名词、代词或动名词，故填because of。 5. 句意：据科学家称，演奏乐器对青少年有益，因为它能提高脑力、记忆力和自信心。空前有逗号，for是连词，只能置于主句之后，用来对前文内容补充说明理由，不用于句首。 6. 句意：桑迪喜欢听轻音乐，因为它令人放松。空格前有逗号隔开，此处对前文喜好作补充解释，并非强直接因果，用连词for。 7. 句意：许多人因为洪水而无家可归。空格后 the flood 是名词，不是句子，because of 后接名词性成分，故填because of。 8. 句意：既然大家都到了，我们开始讨论吧。位于句首，“大家都到齐” 是眼前既定事实，As/Since表示“既然、鉴于”，句首首字母大写。 9. 句意：因为大雨，我们不得不待在酒店而不能外出。空格后为名词短语 the heavy rain，不能接从句，选用 because of，置于句首首字母大写。 10. 句意：能去这场古典音乐会我真的很兴奋，因为我是古典音乐的忠实粉丝。空前有逗号，对主句情绪作补充推断理由，for只能放在主句之后，不可置于主句之前。 三、句型转换(每题2分，满分10分) 1. He didn’t attend the concert because of the heavy rain.(改为同义句) He didn’t attend the concert __________________________. 【答案】because the rain was heavy 【解析】句意：因为大雨，他没有参加音乐会。原句because of为介词短语，后接名词短语the heavy rain；改写后需要接完整句子，because引导原因状语从句，后接从句，因此转换为because the rain was heavy。 2. It rained heavily. We had to stay at home.(用since合并) _______________________________________________. 【答案】Since it rained heavily, we had to stay at home 【解析】句意：雨下得很大。我们不得不待在家里。句意：雨下得很大，我们不得不待在家里。since放句首引导原因状语从句，时态统一一般过去时，从句前置、主句后置，故合并为Since it rained heavily, we had to stay at home。 3. I feel tired lately because I stay up late.(用why表语从句改写) I stay up late. ______________________________. 【答案】That’s why I feel tired lately 【解析】句意：我最近觉得疲惫，因为我熬夜。原句用because引出原因，逻辑为“熬夜→疲惫”。That’s why...是固定句型，意为“那就是……的原因”，用于前半句陈述原因，后半句引出结果，契合本题“先写熬夜，后写疲惫”的句式结构，故改写为That’s why I feel tired lately。 4. Carlson didn’t come to the party. He was busy.(合并为一句) ________________________________________________. 【答案】Carlson didn’t come to the party because he was busy 【解析】句意：Carlson没有来参加派对。他很忙。“忙碌”是没有来派对的原因，用because引导原因状语从句置于主句之后，故合并为Carlson didn’t come to the party because he was busy。 5. The girl joined the music club. She loves music very much.(用as合并句子) ___________________________________________________________ . 【答案】As she loved music very much, the girl joined the music club 【解析】句意：这个女孩非常热爱音乐，所以她加入了音乐俱乐部。as引导原因状语从句，表示“由于、因为”，常置于句首引出背景原因，句首首字母大写；主句为一般过去时joined，从句时态保持一致，使用loved；从句置于前，主句在后，故合并为As she loved music very much, the girl joined the music club。 四、句子翻译(每题2分，满分10分) 1. 由于大雪, 我们被迫缩短(cut ... short)了行程。 ___________________________________________________________ 【答案】We were forced to cut our journey short because of the heavy snow. We were forced to cut our journey short because the snow was heavy/it snowed heavily. 【解析】“由于大雪，我们被迫缩短了行程。” 译为 We were forced to cut our journey short because of the heavy snow./We were forced to cut our journey short because the snow was heavy/it snowed heavily。“我们” 译为 We；“被迫” 译为 were forced to，一般过去时被动语态；“缩短” 使用短语 cut…short；“行程” 译为 journey；“由于” 可用 because of(后接名词短语)或者 because(后接从句)；“大雪” 可表达为 the heavy snow，也可转化为从句 the snow was heavy /it snowed heavily。 2. 植树很重要，因为树木是地球的肺。 __________________________________________________________ 【答案】Planting trees is very important because trees are the lungs of the Earth. 【解析】“植树很重要，因为树木是地球的肺。”译为 Planting trees is very important because trees are the lungs of the Earth。句子描述客观事实，用一般现在时。动名词短语Planting trees作主语，视为单数，be动词用is；very important作表语；because引导原因状语从句；the lungs of the Earth表示“地球的肺”。 3. 既然你喜欢流行音乐，你可以加入音乐俱乐部。 ________________________________________________________________ 【答案】Since you like pop music, you can join the music club. 【解析】“既然你喜欢流行音乐，你可以加入音乐俱乐部”译为 Since you like pop music, you can join the music club。Since 引导原因状语从句，此处意为“既然”；pop music意为“流行音乐”；情态动词can后接动词原形，join the music club表示“加入音乐俱乐部”。 4. 昨天晚上他没有看电影，那是因为他不得不帮助他的妹妹做作业。 He did not see the film last night. __________________________________________ 【答案】That is because he had to help his little sister with her homework. 【解析】句意：他昨天晚上没有看电影。那是因为他不得不帮妹妹做作业。固定句型 That is because…意为“那是因为……”，because引导表语从句；主句为一般过去时，从句中“不得不”用 had to；固定搭配 help sb. with sth.表示“帮助某人做某事”。 5.由于你没有接我的电话，所以我在微信上留言了。 __________________________________________________________ 【答案】As/Since you didn’t answer my call, I left a message on WeChat. 【解析】句意：由于你没有接我的电话，所以我在微信上留言了。As/Since置于句首，引导原因状语从句，意为“由于”；事情发生在过去，从句使用一般过去时 didn’t answer my call；主句也用一般过去时，left a message表示“留言”；on WeChat意为“在微信上”。 第 1 页 共 1 页 学科网（北京）股份有限公司 $