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语法精讲精练（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．—Boy students are always naughty. But our teacher is patient ________ them. —You are so lucky ________ you have a good teacher. A．to, that B．with, because C．with, that 2．Peter didn’t buy the bike ______ he got a new one on his birthday last month. A．if B．when C．even D．because 3．________ everyone is here, let’s start our English lesson. Now turn to Page 22. A．Before B．Whether C．Unless D．Since 4．My friend Lisa wants to join the art club ________ she is interested in painting. A．because B．although C．so that D．as soon as 5．— The road up to the top of the mountain is still closed till the snow weather is over. — It’s necessary, ________ it’s dangerous to go up the mountain in the snowy weather. A．if B．whether C．as D．although 6．—When shall we start, sir? —_________ every one of us is here, let’s start right now. A．Before B．Until C．Since D．While 7．We are making a big cake ________ it’s Dad’s birthday today. A．because B．until C．once D．but 8．I want to buy something special for my mother, ________ her birthday is coming. A．so B．although C．because D．but 9．I didn’t buy the dress ________ I didn’t like the colour. A．until B．so C．because 10．My mother didn’t play games with me yesterday ________ she was very busy. A．but B．because C．although 11．We need to take care of the earth ________ it’s the only planet we have for humans to live on. A．though B．if C．because D．until 12．Elaine was late for the morning meeting ________ she missed the early bus. A．unless B．though C．because D．until 13．________ everybody is here, let’s begin our meeting. A．Since B．While C．Although 14．My grandma makes people feel good ________ she is nice and helpful. A．so B．but C．although D．because 15．I didn’t buy that red dress ________ it was too expensive. A．so B．but C．and D．because 16．Our school life is more colorful now ________ we can join different fun clubs. A．because B．unless C．although D．until 17．________ you have finished your homework, you can go out to play football with your friends. A．Even though B．Now that C．As if D．So that 18．—Why do you like pandas so much? —________they’ re very clever. A．Because B．So C．But D．Or 19．The sky is bluer ________ we have taken action to protect the environment. A．because B．before C．until D．unless 20．I don’t like Sun Cinema, ________ it has bad service (服务). A．but B．so C．because 21．Honey, you spelled the word wrong ________ you missed an “x” and a “u”. A．because B．although C．so 22．Steve is strong and healthy, _________ he always does sports outdoors. A．if B．because C．but 23．Michael was late for school _________ he missed the school bus. A．so B．but C．as D．if 24．People often plant trees in spring ______ it’s a good time for them to grow. A．if B．because C．though D．until 25．Tom felt unhappy, ________ he didn’t think his classmates liked him. A．though B．so C．unless D．because 26．Perhaps you should ask someone else for help ________ you can’t solve the problem. A．so B．since C．unless 27．He had to go home ________ he is in poor health. A．as a result B．because C．so D．because of 28．—________ you’re Lisa’s good friend, you should help her. —OK, Ms. Jones. I’ ll do my best. A．Before B．Since C．After D．While 29．Victor would like to be a doctor in the future ________ he likes helping sick people. A．when B．as C．because D．or 30．________ the whole class took the time to practice, they won the game this year. A．Since B．Unless C．Though 二、完成句子(本大题共10小题，每小题4分，共40分) 31．既然你提到了，王梅也有糟糕的一天。 you it, Wang Mei also had a bad day. 32．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. he had to help his little sister with her homework. 33．我想当医生，因为医生能帮助人们。   I want to a doctor doctors help people. 34．这个工作很酷，因为能帮助人们环游世界。 The job is cool it can help people . 35．Since you have got the results, I won’t spend more time on it.（保持句意基本不变） you have got the results, I won’t spend more time on it. 36．因为没有电，冰箱里的一些东西很快就坏了。 there wasn’t any electricity, some things in the fridge quickly . 37．这个周末我要照顾我的妈妈，因为她生病了。 I must my Mom this weekend she has been ill. 38．David很幸运，因为他的爱好已经给他带来了快乐和成功。 David is very lucky, . 39．I like cats. They are cute. (合并为一句) I like cats they are cute. 40．It was cold, so I closed the window and door.（合并为一句） I closed the window and door it was cold. 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．—Boy students are always naughty. But our teacher is patient ________ them. —You are so lucky ________ you have a good teacher. A．to, that B．with, because C．with, that 【答案】B 【详解】句意：——男学生总是很调皮。但我们的老师对他们很有耐心。——你们真幸运，因为你们有一位好老师。 考查固定搭配和连词的用法。to对；that用于某些动词、形容词和名词后，引出各种从句；with和；because因为。be patient with sb“对某人耐心”，是固定搭配，第一空填with；根据“You are so lucky…”和“you have a good teacher”可知，后半句是前半句的原因，所以第二空用because，故选B。 2．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。 3．________ everyone is here, let’s start our English lesson. Now turn to Page 22. A．Before B．Whether C．Unless D．Since 【答案】D 【详解】句意：既然大家都到了，让我们开始英语课吧。现在翻到第22页。 考查连词辨析。Before在……以前；Whether是否；Unless除非；Since既然。根据“…everyone is here, let’s start our English lesson.”的语境并结合选项可知，此处表示原因，用since引导原因状语从句。故选D。 4．My friend Lisa wants to join the art club ________ she is interested in painting. A．because B．although C．so that D．as soon as 【答案】A 【详解】句意：我的朋友丽莎想加入艺术俱乐部，因为她对绘画感兴趣。 考查连词辨析。because因为；although虽然；so that以便；as soon as一……就……。根据“she is interested in painting”可知，对绘画感兴趣是想加入艺术俱乐部的原因，需用表原因的连词because。故选A。 5．— The road up to the top of the mountain is still closed till the snow weather is over. — It’s necessary, ________ it’s dangerous to go up the mountain in the snowy weather. A．if B．whether C．as D．although 【答案】C 【详解】句意：——通往山顶的道路仍然关闭，直到下雪天气结束。——这是必要的，因为下雪天上山很危险。 考查连词辨析。if如果；whether是否；as因为；although虽然。横线前“It’s necessary”是对上面对话的肯定，即下雪天关闭上山的路是很有必要的，横线后所述“it’s dangerous to go up the mountain in the snowy weather.”是关闭道路的原因，因为雪天上山很危险。故选C。 6．—When shall we start, sir? —_________ every one of us is here, let’s start right now. A．Before B．Until C．Since D．While 【答案】C 【详解】句意：——我们什么时候出发，先生？——既然大家都来了，我们现在就出发吧。 考查连词辨析。Before在……之前；Until直到；Since由于、既然；While当……时。根据下文“let’s start right now”可知，现在就出发是由于人都到齐了。故选C。 7．We are making a big cake ________ it’s Dad’s birthday today. A．because B．until C．once D．but 【答案】A 【详解】句意：我们正在做一个大蛋糕，因为今天是爸爸的生日。 考查连词辨析。because因为；until直到；once一……就；but但是。后半句是前半句的原因，用because引导原因状语从句。故选A。 8．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。 9．I didn’t buy the dress ________ I didn’t like the colour. A．until B．so C．because 【答案】C 【详解】句意：我没有买这条裙子，因为我不喜欢这个颜色。 考查连词的辨析。until直到……为止；so因此；because因为。根据句意可知，前后句为因果关系，应用连词“because”引导原因状语从句，说明为什么不喜欢这条连衣裙的原因。故选C。 10．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。 11．We need to take care of the earth ________ it’s the only planet we have for humans to live on. A．though B．if C．because D．until 【答案】C 【详解】句意：我们需要照顾好地球，因为它是我们唯一可以供人类生活的星球。 考查从属连词辨析。though尽管；if如果；because因为；until直到。前后句表示因果关系，所以用because引导原因状语从句，故选C。 12．Elaine was late for the morning meeting ________ she missed the early bus. A．unless B．though C．because D．until 【答案】C 【详解】句意：伊莱恩早会迟到了，因为她错过了早班车。 考查从属连词辨析。unless除非；though尽管；because因为；until直到。结合句意可知，前句“Elaine was late for the morning meeting”与后句“she missed the early bus.”表示因果关系，应用because引导原因状语从句。故选C。 13．________ everybody is here, let’s begin our meeting. A．Since B．While C．Although 【答案】A 【详解】句意：既然大家都到齐了，我们开始开会吧。 考查连词辨析。Since既然；While在……期间；Although虽然，尽管。“everybody is here”是“begin our meeting”的原因，应用since引导原因状语从句。故选A。 14．My grandma makes people feel good ________ she is nice and helpful. A．so B．but C．although D．because 【答案】D 【详解】句意：我的奶奶让人感觉很好，因为她人好又乐于助人。 考查连词辨析。so所以；but但是；although尽管；because因为。根据“My grandma makes people feel good…she is nice and helpful.”可知，空后为原因状语从句，应用连词because引导。故选D。 15．I didn’t buy that red dress ________ it was too expensive. A．so B．but C．and D．because 【答案】D 【详解】句意：我没有买那条红裙子，因为它太贵了。 考查连词辨析。so所以；but但是；and和；because因为。根据“I didn’t buy that red dress”和“it was too expensive”可知，后半句是在解释没买红裙子的原因，“because”用于引导原因状语从句。 故选D。 16．Our school life is more colorful now ________ we can join different fun clubs. A．because B．unless C．although D．until 【答案】A 【详解】句意：我们的校园生活现在更加丰富多彩，因为我们可以参加各种有趣的俱乐部。 考查连词辨析。because因为；unless除非；although虽然；until直到。根据“we can join different fun clubs”可知，后半句是前半句“校园生活更丰富多彩”的原因，所以用because连接。故选A。 17．________ you have finished your homework, you can go out to play football with your friends. A．Even though B．Now that C．As if D．So that 【答案】B 【详解】句意：既然你已经完成了作业，就可以出去和朋友们踢足球了。 考查从属连词辨析。Even though即使；Now that既然，由于；As if好像，仿佛；So that为了，以便。分析句子结构可知，“you have finished your homework”是“you can go out to play football with your friends”的原因，应用“Now that”引导原因状语从句，强调已知的事实。故选B。 18．—Why do you like pandas so much? —________they’ re very clever. A．Because B．So C．But D．Or 【答案】A 【详解】句意：——你为什么这么喜欢熊猫？——因为它们非常聪明。 考查连词辨析。Because因为，引导原因状语从句，回答why的提问；So所以，表示结果；But但是，表示转折；Or或者，表示选择。根据问句“Why do you like pandas so much?”可知，这是在询问喜欢熊猫的原因，所以回答时应该用“Because”来引导原因状语从句。故选A。 19．The sky is bluer ________ we have taken action to protect the environment. A．because B．before C．until D．unless 【答案】A 【详解】句意：天空更蓝了，因为我们已经采取行动保护环境。 考查连词辨析。because 因为；before在……之前；until直到；unless 除非。根据“we have taken action to protect the environment”可知，此处是表示原因，用because引导原因状语从句。故选A。 20．I don’t like Sun Cinema, ________ it has bad service (服务). A．but B．so C．because 【答案】C 【详解】句意：我不喜欢阳光电影院，因为它的服务很差。 考查连词辨析。but但是；so因此；because因为。根据“it has bad service”可知，此处是在解释“I don’t like Sun Cinema”原因。故选C。 21．Honey, you spelled the word wrong ________ you missed an “x” and a “u”. A．because B．although C．so 【答案】A 【详解】句意：亲爱的，你把这个单词拼错了，因为你少了一个“x”和一个“u”。 考查连词辨析。because因为；although虽然；so所以。根据“you spelled the word wrong ... you missed an ‘x’ and a ‘u’.”可知，空格前后是因果关系，前果后因，用because引导原因状语从句。故选A。 22．Steve is strong and healthy, _________ he always does sports outdoors. A．if B．because C．but 【答案】B 【详解】句意：史蒂夫身体强健，因为他总是在户外运动。 考查连词辨析。if如果；because因为；but但是。根据“Steve is strong and healthy...he always does sports outdoors.”可知，常做户外运动是史蒂夫身体强健的原因。故选B。 23．Michael was late for school _________ he missed the school bus. A．so B．but C．as D．if 【答案】C 【详解】句意：迈克尔上学迟到了，因为他错过了校车。 考查连词辨析。so因此（表结果）；but但是（表转折）；as因为（表原因）；if如果（表假设）。根据“missed the school bus”和“late for school”可知，前后之间存在因果关系。故选C。 24．People often plant trees in spring ______ it’s a good time for them to grow. A．if B．because C．though D．until 【答案】B 【详解】句意：人们经常在春天种树，因为这是它们生长的好时机。 考查连词辨析。if如果；because因为；though虽然，尽管；until到……时，直到……为止。根据“People often plant trees in spring...it’s a good time for them to grow.”可知人们经常在春天种树，因为这是它们生长的好时机，前后为因果关系。故选B。 25．Tom felt unhappy, ________ he didn’t think his classmates liked him. A．though B．so C．unless D．because 【答案】D 【详解】句意：汤姆感到不高兴，因为他认为他的同学不喜欢他。 考查连词辨析。though尽管；so所以；unless除非；because因为。根据“Tom felt unhappy…he didn’t think his classmates liked him.”的语境可知，前后句之间表示因果关系，前果后因，用because引导原因状语从句。故选D。 26．Perhaps you should ask someone else for help ________ you can’t solve the problem. A．so B．since C．unless 【答案】B 【详解】句意：既然你解决不了这个问题，也许你应该找别人帮忙。 考查连词辨析。so所以；since既然；unless除非。根据“you can’t solve the problem”可知，此处指“既然你解决不了这个问题”，故选B。 27．He had to go home ________ he is in poor health. A．as a result B．because C．so D．because of 【答案】B 【详解】句意：他不得不回家，因为他身体不好。 考查原因状语从句。as a result因此，介词短语；because因为，引导原因状语从句；so所以；because of因为，后接名词、‌代词、‌动名词等。‌空后“he is in poor health”是空前“他不得不回家”的原因，所以此处应用because引导原因状语从句。故选B。 28．—________ you’re Lisa’s good friend, you should help her. —OK, Ms. Jones. I’ ll do my best. A．Before B．Since C．After D．While 【答案】B 【详解】句意：——既然你是丽萨的好朋友，你就应该帮她。——好的，琼斯女士，我会尽力的。 考查连词词义辨析。Before……之前；Since既然；After……之后；While在……期间。根据“you’re Lisa’s good friend, you should help her.”可知，前后句为因果关系，Since“既然”符合语境。故选B。 29．Victor would like to be a doctor in the future ________ he likes helping sick people. A．when B．as C．because D．or 【答案】C 【详解】句意：维克多将来想成为一名医生，因为他喜欢帮助生病的人。 考查从属连词辨析。when当……时候；as当……时候；because因为；or或者。根据“Victor would like to be a doctor in the future…he likes helping sick people”可知，此处在说想成为医生的原因，应用because引导原因状语从句。故选C。 30．________ the whole class took the time to practice, they won the game this year. A．Since B．Unless C．Though 【答案】A 【详解】句意：由于全班都花时间练习，他们今年赢了比赛。 考查连词辨析。Since由于；Unless除非；Though虽然。根据“the whole class took the time to practice, they won the game this year.”可知，句子前后是因果关系，前句是后句的原因，用since引导原因状语从句。故选A。 二、完成句子(本大题共10小题，每小题4分，共40分) 31．既然你提到了，王梅也有糟糕的一天。 you it, Wang Mei also had a bad day. 【答案】 Now that mention 【详解】根据中英文对照，空格处缺“既然”和“提到”的英文。“既然”对应的英文是“now that”，位于句首，首字母大写，“提到”对应的英文是“mention”。此处描述现在的动作，用一般现在时，主语是you，谓语动词用原形。故填Now；that；mention。 32．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. he had to help his little sister with her homework. 【答案】 That is because 【详解】根据中英文对应可知，需要翻译“那是因为”，that is“那是”，首字母大写，because“因为”，引导原因状语从句。故填That；is；because。 33．我想当医生，因为医生能帮助人们。   I want to a doctor doctors help people. 【答案】 be because 【详解】对比中英文可知，空处缺少“当”和“因为”；want to be a/an +职业“想成为……（职业）”，固定搭配；because“因为”，连词，引导原因状语从句。故填be；because。 34．这个工作很酷，因为能帮助人们环游世界。 The job is cool it can help people . 【答案】 because travel around 【详解】中英文对照可知，第一空表示“因为”，用连词“because”来引导原因状语从句；后两空表示“环游”，用动词短语“travel around”表示，且help sb. do sth.为固定搭配，意为“帮助某人做某事”，所以travel用原形。故填because；travel；around。 35．Since you have got the results, I won’t spend more time on it.（保持句意基本不变） you have got the results, I won’t spend more time on it. 【答案】 Now that 【详解】句意：既然你已经得到了结果，我就不会再在这件事上花更多时间了。Since有“既然；由于”之意，其同义表达可用now that ，二者都用于引出已知事实作为理由，now位于句首首字母大写。因此空一填Now，空二填that。故填Now；that。 36．因为没有电，冰箱里的一些东西很快就坏了。 there wasn’t any electricity, some things in the fridge quickly . 【答案】 Since went bad 【详解】根据中英文提示，第一空缺少“因为”的表达，第二、三空缺少“坏了”的表达；since“因为”，强调“已知/显而易见的原因”，符合语境；go bad“变质”，根据“there wasn’t”可知时态为一般过去时，此处用过去式。故填Since；went；bad。 37．这个周末我要照顾我的妈妈，因为她生病了。 I must my Mom this weekend she has been ill. 【答案】 care/look for/after because 【详解】care for/look after“照顾”，情态动词must后接动词原形；because“因为”，引导原因状语从句。故填care/look；for/after；because。 38．David很幸运，因为他的爱好已经给他带来了快乐和成功。 David is very lucky, . 【答案】because his hobby has brought him pleasure and success 【详解】because“因为”；his hobby“他的爱好”；bring“带来”，此处表示对现在造成影响，应该用现在完成时，主语为第三人称单数，助动词用has，bring的过去分词为brought；he“他”，此处作宾语，应该用宾格him；pleasure and success“快乐和成功”。故填because his hobby has brought him pleasure and success。 39．I like cats. They are cute. (合并为一句) I like cats they are cute. 【答案】because 【详解】句意：我喜欢猫。它们很可爱。分析题干可知，“They are cute.”是“I like cats.”的原因，即：因为猫很可爱，所以我喜欢它们，用because“因为”引导原因状语从句。故填because。 40．It was cold, so I closed the window and door.（合并为一句） I closed the window and door it was cold. 【答案】because 【详解】句意：天气很冷，所以我要关上门窗。“天气冷”是“关上门窗”的原因，用because引导原因状语从句，故填because。 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 $