Module 3 Heroes 语法Grammar 原因状语从句-2025-2026学年九年级英语上册模块重难点易错题精练（外研版）

班级 姓名 学号 分数 Module 3 Heroes 原因状语从句 （时间：60分钟，满分：100分） 原因状语从句表原因，常见的引导词有： because（因为），since（既然），as（既然），for（因为） 1.because引导的原因状语从句一般放于主句之后，because表示直接原因，语气最强，回答why引导的疑问句必须使用because。 I do it because I like it..——Why didn’t he come yesterday?——Because he had something important to do. 注意 “not……because” 结构中的not否定的是because引导的整个从句， 例如：The country is not strong because it is large.国强不在大。 2． Since引导的原因状语从句一般位于主句之前，表示已知的、显然的理由。通常被翻译成“既然”，较为正式，语气比because弱。 Since you are free today, you had better help me with my mathematics.     既然今天你休息，你最好帮我补习数学。 3.as引导原因状语从句时表示附带说明的“双方已知的原因”，语气比since弱，较正式，位置较灵活，常放于主句之前。 As it is raining, you’d better take a taxi.     既然在下雨，你最好乘出租汽车。 4. for引导的原因状语从句并不说明主句行为发生的直接原因，只提供一些辅助性的补充说明，for引导的原因状语从句只能放于主句之后并且必须用逗号将其与主句隔开。 He could not have seen me, for I was not there. 他不可能见过我，因为我不在那里。 It’s a long time since we met last. 好久没见面了。 一、单项选择(本大题共30小题，每小题2分，共60分) 1．Peter didn’t buy the bike ______ he got a new one on his birthday last month. A．if B．when C．even D．because 2．________ over 400 million adults are too heavy, China has made a plan to help its people with weight control. A．Since B．Unless C．Though D．Until 3．In Germany, you’d better not send gifts before someone’s birthday _________ early gifts are seen as bad luck. A．because B．though C．but 4．Nowadays museums are becoming more popular ________ people want to learn more about culture and history. A．until B．unless C．as D．although 5．—David, the top student in our class, is really hard-working. —He studies so hard ________ he wants to enter a good high school. A．that B．because C．and 6．We decided to stay indoors and play games ___________ it was raining. A．unless B．although C．since D．so 7．Penguins often stand close together ________ it’s very cold in their living place. A．so B．but C．because D．and 8．________ everybody makes a mistake in his or her life, let’s give him or her another chance. A．Until B．Since C．Unless 9．________ we’ve got a long time to wait for the plane, let’s have a cup of coffee. A．Since B．Although C．When D．Before 10．Peter wants to read this story again _________ it is very interesting. A．when B．so C．because D．until 11．________ you’ve cleaned up, you’d better go to bed right now. A．So that B．Because of C．Now that D．So 12．I want to buy something special for my mother, ________ her birthday is coming. A．so B．although C．because D．but 13．My mother didn’t play games with me yesterday ________ she was very busy. A．but B．because C．although 14．There are a lot of places of interest in Xi’an ________ it has a long history. A．if B．because C．as soon as D．so that 15．The athlete received a lot of cheers from the audience _________ she won the champion in the final. A．because B．though C．so that D．even if 16．The river has become much cleaner ___________ the villagers made great efforts to protect it. A．if B．until C．though D．because 17．—John, ________ we’ve got a few minutes to wait for the meal, let’s read the poem To Wang Lun. —OK, Mom. A．since B．though C．until D．before 18．The idea of “Made in China” caught the world’s attention in the 2023 Asian Games ________ it played a big role in the event. A．if B．unless C．because D．although 19．We should do sports every day ________ it is good for our health. A．until B．because C．while D．though 20．Tony never spends any money in buying book, _________ he doesn’t like reading. A．so B．because C．although D．because of 21．I don’t have to introduce her to you ________ you know the girl. A．until B．unless C．since D．whenever 22．I think Leonardo da Vinci was a great inventor ________ he was a pioneer in many areas. A．because B．or C．if D．but 23．Spiders are considered friends to gardeners ________ they eat lots of bugs that attack plants. A．although B．unless C．because D．until 24．Many older buildings in Dalian look beautiful ________ workers make them look as good as new. A．while B．if C．although D．because 25．________ you have grown up, you should learn to look after yourselves. A．Since B．Until C．Although D．Unless 26．My friend Mike finished the work the best of us _______ he was the most experienced. A．because B．and C．but D．unless 27．Little Tim joined the Helpers’ Club two weeks ago __________ he is an animal lover. A．if B．until C．because D．unless 28．Many people prefer reading paper books ________ they are comfortable to read. A．and B．but C．because D．so 29．_________ the big forest fire has already been under control, no more firefighters will be sent there. A．Now that B．While C．Even if D．Though 30．________ you have grown up, you should think and make decisions on your own. A．Until B．Since C．Although D．When 二、完成句子(本大题共10小题，每小题4分，共40分) 31．既然孩子们都知道了，我们可以告诉其他人。 the children know, we can tell anyone else. 32．既然这个任务很有价值，为何不尽快开展呢？ Why not ? 33．露西昨天缺席了会议，因为她的车抛锚了。 Lucy yesterday. 34．既然这个项目很有价值，为何不尽快开展呢？ Why don’t you it is of great value? 35．我想去看卧龙自然保护区里的大熊猫，因为在那儿人们可以离它们更近。 I wanted to see the pandas in the Wolong Panda Reserve, . 36．我晚饭不喜欢汉堡包因为它们不健康。 I don’t like hamburgers for dinner they’re not . 37．由于他身体欠佳，我决定独自去那里。 he was not feeling well, I go there alone. 38．我们不能去野餐，因为正在下很大雨。 We can’t go for a picnic . 39．凯特很伤心, 因为她的小猫死了。 Kate was sad . 40．既然没有人看到，我拒绝相信你。 nobody saw it, I you. 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $$ 班级 姓名 学号 分数 Module 3 Heroes 原因状语从句 （时间：60分钟，满分：100分） 原因状语从句表原因，常见的引导词有： because（因为），since（既然），as（既然），for（因为） 1.because引导的原因状语从句一般放于主句之后，because表示直接原因，语气最强，回答why引导的疑问句必须使用because。 I do it because I like it..——Why didn’t he come yesterday?——Because he had something important to do. 注意 “not……because” 结构中的not否定的是because引导的整个从句， 例如：The country is not strong because it is large.国强不在大。 2． Since引导的原因状语从句一般位于主句之前，表示已知的、显然的理由。通常被翻译成“既然”，较为正式，语气比because弱。 Since you are free today, you had better help me with my mathematics.     既然今天你休息，你最好帮我补习数学。 3.as引导原因状语从句时表示附带说明的“双方已知的原因”，语气比since弱，较正式，位置较灵活，常放于主句之前。 As it is raining, you’d better take a taxi.     既然在下雨，你最好乘出租汽车。 4. for引导的原因状语从句并不说明主句行为发生的直接原因，只提供一些辅助性的补充说明，for引导的原因状语从句只能放于主句之后并且必须用逗号将其与主句隔开。 He could not have seen me, for I was not there. 他不可能见过我，因为我不在那里。 It’s a long time since we met last. 好久没见面了。 一、单项选择(本大题共30小题，每小题2分，共60分) 1．Peter didn’t buy the bike ______ he got a new one on his birthday last month. A．if B．when C．even D．because 【答案】D 【详解】句意：彼得没有买这辆自行车，因为他上个月生日那天得到了一辆新的。 考查连词辨析。if如果；when当；even甚至；because因为。后句是前句的原因，用because引导原因状语从句。故选D。 2．________ over 400 million adults are too heavy, China has made a plan to help its people with weight control. A．Since B．Unless C．Though D．Until 【答案】A 【详解】句意：因为超过4亿成年人体重超标，中国制定了一个计划来帮助人们控制体重。 考查从属连词辨析。Since因为；Unless除非；Though尽管；Until直到。根据“over 400 million adults are too heavy”可知，“超过4亿成年人体重超标”是“制定计划来帮助人们控制体重”的原因，用since引导原因状语从句。故选A。 3．In Germany, you’d better not send gifts before someone’s birthday _________ early gifts are seen as bad luck. A．because B．though C．but 【答案】A 【详解】句意：在德国，你最好不要在别人生日之前送礼物，因为提前送礼物被视为不吉利。 考查连词辨析。because因为；though虽然；but但是。后句是前句的原因，用because引导原因状语从句。故选A。 4．Nowadays museums are becoming more popular ________ people want to learn more about culture and history. A．until B．unless C．as D．although 【答案】C 【详解】句意：如今，博物馆变得越来越受欢迎，因为人们想了解更多的文化和历史。 考查连词辨析。until直到；unless除非；as因为；although虽然。根据“people want to learn more about culture and history.”可知，设空处后解释了原因，as符合语境。故选C。 5．—David, the top student in our class, is really hard-working. —He studies so hard ________ he wants to enter a good high school. A．that B．because C．and 【答案】B 【详解】句意：——David是我们班最优秀的学生，真的很努力。——他学习如此努力，因为他想进入一所好高中。 考查连词辨析。that那；because因为；and和。“he wants to enter a good high school”是“He studies so hard”的原因。because意为“因为”，引导原因状语从句，符合句子逻辑。故选B。 6．We decided to stay indoors and play games ___________ it was raining. A．unless B．although C．since D．so 【答案】C 【详解】句意：因为下雨了，我们决定待在室内做游戏。 考查连词辨析。unless除非；although尽管；since因为；so因此。根据“it was raining.”可知，后文给出下雨是导致他们待在室内的原因。故选C。 7．Penguins often stand close together ________ it’s very cold in their living place. A．so B．but C．because D．and 【答案】C 【详解】句意：企鹅经常站得很近，因为它们生活的地方很冷。 考查连词辨析。so所以；but但是；because因为；and和。根据“Penguins often stand close together…it’s very cold in their living place.”可知，前后句子是因果关系，应该用because引导原因状语从句。故选C。 8．________ everybody makes a mistake in his or her life, let’s give him or her another chance. A．Until B．Since C．Unless 【答案】B 【详解】句意：既然每个人在他或她的一生中都会犯错误，那就让我们再给他或她一次机会。 考查连词。until直到；since既然；unless除非。根据“…everybody makes a mistake in his or her life, let’s give him or her another chance”可知，前句是后句的原因，而且表示已知的原因，应用since引导原因状语从句，故选B。 9．________ we’ve got a long time to wait for the plane, let’s have a cup of coffee. A．Since B．Although C．When D．Before 【答案】A 【详解】句意：既然我们等飞机还有很长时间，我们喝杯咖啡吧。 考查连词辨析。Since既然；Although尽管；When当……时；Before在……之前。根据“let’s have a cup of coffee”可知去喝咖啡是因为要等很长时间飞机，用since引导原因状语从句。故选A。 10．Peter wants to read this story again _________ it is very interesting. A．when B．so C．because D．until 【答案】C 【详解】句意：彼得想再读一遍这个故事，因为它很有趣。 考查连词辨析。when当……时；so因此；because因为；until直到。根据“it is very interesting.”可知，后句表示原因，用because引导原因状语从句，故选C。 11．________ you’ve cleaned up, you’d better go to bed right now. A．So that B．Because of C．Now that D．So 【答案】C 【详解】句意：既然你已经打扫干净了，你最好现在就去睡觉。 考查原因状语从句的连接词。So that以便，为了，引导目的状语从句；Because of因为，由于，后跟名词、代词或动名词；Now that既然，由于，引导原因状语从句，主从句因果关系不强，且有时间先后关系；So所以，引导结果状语从句。根据分析句子“…you’ve cleaned up, you’d better go to bed right now.”可知，前后构成因果关系，所以此处应该用Now that引导原因状语从句。故选C。 12．I want to buy something special for my mother, ________ her birthday is coming. A．so B．although C．because D．but 【答案】C 【详解】句意：我想给我妈妈买一些特别的东西，因为她的生日快到了。 考查连词辨析。so因此；although虽然；because因为；but但是。根据“I want to buy something special for my mother”和“her birthday is coming”可知，前后是因果关系，前果后因，应该用because引导原因状语从句。故选C。 13．My mother didn’t play games with me yesterday ________ she was very busy. A．but B．because C．although 【答案】B 【详解】句意：我妈妈昨天没有和我玩游戏，因为她很忙。 考查连词辨析。but但是；because因为；although尽管。根据“she was very busy”可知，此处解释了妈妈昨天没有和我玩游戏的原因，应该用because引导原因状语从句。故选B。 14．There are a lot of places of interest in Xi’an ________ it has a long history. A．if B．because C．as soon as D．so that 【答案】B 【详解】句意：西安有很多名胜古迹，因为它有悠久的历史。 考查连词辨析。if如果；because因为；as soon as一……就……；so that以便。分析句子可知，设空处前后为因果关系，用because引导原因状语从句。故选B。 15．The athlete received a lot of cheers from the audience _________ she won the champion in the final. A．because B．though C．so that D．even if 【答案】A 【详解】句意：那名运动员收到了来自观众的无数欢呼，因为她在决赛中赢得了冠军。 考查连词辨析。because因为；though尽管；so that以便于；even if即使。分析前后句关系可知“she won the champion in the final”是“The athlete received a lot of cheers from the audience”的原因，因此应用“because”引导原因状语从句。故选A。 16．The river has become much cleaner ___________ the villagers made great efforts to protect it. A．if B．until C．though D．because 【答案】D 【详解】句意：这条河变得干净多了，因为村民们做出了巨大的努力来保护它。 考查连词辨析。if如果；until直到；though尽管；because因为。分析句子可知，前后是因果关系，前果后因，故选D。 17．—John, ________ we’ve got a few minutes to wait for the meal, let’s read the poem To Wang Lun. —OK, Mom. A．since B．though C．until D．before 【答案】A 【详解】句意：——约翰，既然我们还有几分钟时间等餐，让我们读一下《赠汪伦》这首诗吧。 ——好的，妈妈。 考查从属连词辨析。since由于，既然；though虽然，尽管；until直到……为止；before在……之前。根据“we’ve got a few minutes to wait for the meal, let’s read the poem To Wang Lun.”可知，前后句之间表达的是因果关系，因此用since引导原因状语从句。故选A。 18．The idea of “Made in China” caught the world’s attention in the 2023 Asian Games ________ it played a big role in the event. A．if B．unless C．because D．although 【答案】C 【详解】句意：“中国制造”的理念在2023年亚运会上引起了全世界的关注，因为它在这项赛事中发挥了重要作用。 考查连词辨析。if如果；unless除非，如果不；because因为；although尽管。本句前后表述内容“The idea of ‘Made in China’ caught the world’s attention”和“it played a big role in the event”构成因果关系，设空处后为原因，所以选填because。故选C。 19．We should do sports every day ________ it is good for our health. A．until B．because C．while D．though 【答案】B 【详解】句意：我们应该每天做运动，因为这对我们的健康有好处。 考查从属连词词义辨析。until直到……为止；because因为；while当……的时候；though尽管。分析可知，“it is good for our health”是“We should do sports every day”的原因，所以用because引导原因状语从句。故选B。 20．Tony never spends any money in buying book, _________ he doesn’t like reading. A．so B．because C．although D．because of 【答案】B 【详解】句意：托尼从不花钱买书，因为他不喜欢读书。 考查连词。so因此；because因为；although虽然；because of由于。根据“Tony never spends any money in buying book…he doesn’t like reading.”可知是指托尼从不花钱买书，因为他不喜欢读书，because引导原因状语从句。故选B。 21．I don’t have to introduce her to you ________ you know the girl. A．until B．unless C．since D．whenever 【答案】C 【详解】句意：既然你认识那个女孩，我就不必把她介绍给你了。 考查连词辨析。until直到；unless除非；since既然；whenever无论何时。根据“you know the girl.”可知，因为已经认识那个女孩，所以就不必介绍了，应用since引导原因状语从句，故选C。 22．I think Leonardo da Vinci was a great inventor ________ he was a pioneer in many areas. A．because B．or C．if D．but 【答案】A 【详解】句意：我认为列奥纳多·达·芬奇是一位伟大的发明家，因为他在许多领域都是先驱。 考查连词辨析。because因为；or或；if如果；but但是。根据“he was a pioneer in many areas”可知后文解释的是原因。故选A。 23．Spiders are considered friends to gardeners ________ they eat lots of bugs that attack plants. A．although B．unless C．because D．until 【答案】C 【详解】句意：蜘蛛被认为是园丁的朋友，因为它们吃很多攻击植物的虫子。 考查连词。although虽然；unless除非；because因为；until直到。根据“they eat lots of bugs that attack plants”可知是因为它们吃很多攻击植物的虫子，表因果关系，故选C。 24．Many older buildings in Dalian look beautiful ________ workers make them look as good as new. A．while B．if C．although D．because 【答案】D 【详解】句意：大连的许多老建筑看起来很漂亮，因为工人们使它们看起来像新的一样。 考查连词辨析。while当……的时候；if如果；although虽然；because因为。根据“workers make them look as good as new.”可知，这里是由because引导的原因状语从句。故选D。 25．________ you have grown up, you should learn to look after yourselves. A．Since B．Until C．Although D．Unless 【答案】A 【详解】句意：既然你已经长大了，你就应该学会照顾自己。 考查连词辨析。Since既然；Until直到；Although尽管；Unless除非。根据“you should learn to look after yourselves”和“you should learn to look after yourselves”可知二者为因果关系，故选A。 26．My friend Mike finished the work the best of us _______ he was the most experienced. A．because B．and C．but D．unless 【答案】A 【详解】句意：我的朋友迈克是我们中完成工作最好的，因为他最有经验。 考查连词辨析。because因为；and和；but但是；unless除非。因为迈克最有经验，所以工作完成最好，后文表原因，故用because连接。故选A。 27．Little Tim joined the Helpers’ Club two weeks ago __________ he is an animal lover. A．if B．until C．because D．unless 【答案】C 【详解】句意：小吉姆两周前加入了动物助手俱乐部，因为他是一个动物爱好者。 考查连词辨析。if如果；until直到……为止；because因为；unless除非。根据“joined the Helpers’ Club”以及“he is an animal lover”可知，空格后是空格前加入俱乐部的原因。 故选C。 28．Many people prefer reading paper books ________ they are comfortable to read. A．and B．but C．because D．so 【答案】C 【详解】句意：许多人更喜欢读纸质书，因为它们读起来很舒服。 考查连词辨析。and和；but但是；because因为；so因此。“they are comfortable to read”是许多人喜欢读纸质书的原因，前果后因，用because引导原因状语从句。故选C。 29．_________ the big forest fire has already been under control, no more firefighters will be sent there. A．Now that B．While C．Even if D．Though 【答案】A 【详解】句意：既然森林大火已经得到控制，就不会再派消防员去那里了。 考查连词。Now that既然，由于；While虽然；Even if即使；Though尽管。根据“no more firefighters will be sent there.”可知，不再派消防队员去那里了，是因为那里的大火已经被控制了，因此用连词now that引导原因状语从句，故选A。 30．________ you have grown up, you should think and make decisions on your own. A．Until B．Since C．Although D．When 【答案】B 【详解】句意：既然你已经长大了，你应该自己思考并作出决定。 考查连词辨析。until直到；since既然；although尽管，虽然；when当……时。根据“...you have grown up, you should think and make decisions on your own.”可知，既然你已经长大了，你应该自己思考并作出决定，应用since引导原因状语从句。故选B。 二、完成句子(本大题共10小题，每小题4分，共40分) 31．既然孩子们都知道了，我们可以告诉其他人。 the children know, we can tell anyone else. 【答案】 Now that 【详解】now that“既然”，引导原因状语从句，故填Now；that。 32．既然这个任务很有价值，为何不尽快开展呢？ Why not ? 【答案】carry out the task as soon as possible since it is valuable/carry out the task as soon as possible since it is of great value 【详解】开展：carry out；这个任务：the task；尽快：as soon as possible；既然：since；it is作从句的主谓结构；有价值：be valuable/be of great value。结合why not do sth，此处用动词原形。故填carry out the task as soon as possible since it is valuable/of great value。 33．露西昨天缺席了会议，因为她的车抛锚了。 Lucy yesterday. 【答案】was absent from the meeting because her car broke down 【详解】“缺席”be absent from；“会议”the meeting；“因为”because；“她的车”her car；“抛锚”break down。根据“yesterday”可知用一般过去时。故填was absent from the meeting because her car broke down。 34．既然这个项目很有价值，为何不尽快开展呢？ Why don’t you it is of great value? 【答案】carry out the project as soon as possible since 【详解】carry out“实施，开展”，the project“这个项目”；as soon as possible“尽快”；since“既然”，引导原因状语从句，固定句式：Why don’t you do sth“你为什么不做某事”，故填carry out the project as soon as possible since。 35．我想去看卧龙自然保护区里的大熊猫，因为在那儿人们可以离它们更近。 I wanted to see the pandas in the Wolong Panda Reserve, . 【答案】because it allows people to get closer to them 【详解】根据中文提示及所给英文可知，此处考查because“因为”引导的原因状语从句，从句中含动词短语allow sb. to do sth.“允许某人做某事”以及get closer to sb.“离某人更近”，本句主语为代词it，指代前句中的“自然保护区”，且此处表示的是事实，用一般现在时，谓语动词用三单形式。故填because it allows people to get closer to them。 36．我晚饭不喜欢汉堡包因为它们不健康。 I don’t like hamburgers for dinner they’re not . 【答案】 because healthy 【详解】“因为”because，引导原因状语从句；“健康的”healthy，形容词作表语。故填because；healthy。 37．由于他身体欠佳，我决定独自去那里。 he was not feeling well, I go there alone. 【答案】 As decided to 【详解】as“由于”，引导的原因状语从句，常放在主句之前，说明原因或理由，后面的主句说明结果；decide to do sth. “决定做某事”，固定短语；根据汉语分析句子可知，这是一个由as引导的原因状语从句，由“...he was not feeling well,”可判断主句时态为一般过去时，谓语动词decide要使用过去式decided。故填As；decided；to。 38．我们不能去野餐，因为正在下很大雨。 We can’t go for a picnic . 【答案】because it’s raining hard 【详解】根据句意可知，此句为现在进行时，because：因为；it’s raining hard：正在下很大雨，故填because it’s raining hard。 39．凯特很伤心, 因为她的小猫死了。 Kate was sad . 【答案】because her cat died/because of her cat’s death 【详解】分析所给中英文可知要翻译的是“因为她的小猫死了”。“因为”对应的英文是“because”或“because of”；“死”对应的英文是“die”；“because”后接从句；句子用一般过去时，故对应的答案是because her cat died；“because of”后接短语；“die”对应的名词是“death”。故对应的答案是because of her cat’s death。故填because her cat died/because of her cat’s death。 40．既然没有人看到，我拒绝相信你。 nobody saw it, I you. 【答案】 Since refused to trust/believe 【详解】对比中英文，英语句中缺少“既然”和“拒绝相信”。第一空为since引导的原因状语从句，表示显然的、已知的理由，since“既然”，位于句首，首字母大写；refuse to do sth“拒绝做某事”，根据第一句中的“saw”，用一般过去时，动词用过去式refused；believe/trust“相信”。故填Since；refused；to；trust/believe。 试卷第1页，共3页 试卷第1页，共3页 学科网（北京）股份有限公司 $$