内容正文:
2026-2027学年一线教师制作新教材英语同步精品系列资料,名师遴选!
2026-2027学年一线教师制作新教材英语同步精品系列资料,名师遴选!
学校:___________姓名:___________班级:___________考号:___________
Unit 1 Teenagers today
重点语法:条件状语从句和原因状语从句精讲精练
语法知识精讲
📌总览
状语从句:用一个完整句子充当状语,修饰主句的动作,表达条件、原因、时间等逻辑。
条件状语从句:表 “假如、如果”;原因状语从句:表 “因为”。
第一部分 条件状语从句精讲(if 引导)
一、基本概念
✅条件状语从句:由连词 if(如果)、unless(除非,如果不)引导,表示某动作发生的前提条件。
句子结构:主句 + 引导词 + 条件状语从句
例句:
If you work hard, you will pass the exam.
如果你努力学习,你将会通过考试。
二、核心语法规则:主将从现❗【中考最高频】
🔴主将从现规则:
1. 主句:一般将来时(will / shall / be going to)
2. if / unless引导的条件从句:用一般现在时表将来,不能使用将来时!
✅ If it is fine tomorrow, we will go hiking.
如果明天天气好,我们就去远足。
❌ If it will be fine tomorrow, we will go hiking.(错误,从句不能用 will)
拓展 “主将从现” 另外两种情况
主句时态
从句时态
例句
主句为祈使句
从句一般现在时
Work hard if you want to succeed. 如果你想成功就努力。
主句含情态动词 (can/must/should)
从句一般现在时
You can stay here if you finish your homework. 如果你完成作业就可以待在这里。
📝口诀:主句将来 / 祈使 / 情态,从句一般现在表将来
三、引导词 if 和 unless 辨析
引导词
含义
逻辑等价转换
例句
if
如果
—
If you exercise, you will be healthy. 如果你锻炼,你会很健康。
unless
除非;如果不
= if…not
Unless you hurry up, you will be late.
= If you don’t hurry up, you will be late.
除非你快点,否则你会迟到。
⚠️注意:unless 本身已经带有否定含义,从句不要再加 not!
❌ Unless you do not try, you won’t know.
四、if 的两个身份,务必区分【易混陷阱】
1.if = 如果 → 引导条件状语从句,遵循主将从现
I will go if he comes. 如果他来,我就去。
2.if = 是否 → 引导宾语从句,时态根据实际情况,不遵循主将从现
I don’t know if he will come tomorrow.
我不知道他明天是否会来。(宾语从句,tomorrow 表将来,用 will come)
💡做题小技巧:翻译句子,翻译为如果→条件状语从句;翻译为是否→宾语从句。
第二部分 原因状语从句精讲
一、基本概念
✅原因状语从句:由 because, since, as 引导,用来解释主句动作发生的原因。
结构:主句 + 原因引导词 + 原因从句;引导词也可以放在句首。
二、三大引导词辨析(重点)
连词
语气强弱
用法说明
例句
because
最强⭐⭐⭐⭐⭐
直接回答 why 提问;重点强调原因;可放句首、句中
He didn’t go to school because he was ill.
他没上学,因为他生病了。
since
中等⭐⭐⭐
既然;用于已知、显而易见的理由,常放句首
Since you are tired, you can have a rest.
既然你累了,你可以休息一会。
as
较弱⭐⭐
由于;双方都知晓的原因,多用于句首
As it rained, we stayed at home.
由于下雨,我们待在家里。
🟥【中考改错必考点】
because 和 so 绝对不能同时出现在一个句子当中,二者只能选其一!
❌ Because he was ill, so he didn’t come.
✅ Because he was ill, he didn’t come.
✅ He was ill, so he didn’t come.
补充:for 是并列连词,也可以表 “因为”,不能放句首,放在两个分句中间,表补充推测,不属于状语从句。
He must be at home, for the light is on. 他一定在家,因为灯亮着。
三、why 和 because 的问答
—Why were you late? 你为什么迟到?
—Because I missed the bus. 因为我错过了公交车。
✨回答 why 的提问,只能用 because,不能用 since/as。
第三部分 解题做题步骤
✅条件状语从句做题步骤
1. 看到 if,先翻译:译为如果→条件状语从句;译为是否→宾语从句
2. 条件状语从句牢记:主句将来 / 祈使 / 情态,从句用一般现在时,拒绝 will
3. 看到 unless,可以替换成 if…not 帮助理解;注意 unless 自带否定含义,不要再加 not
✅原因状语从句做题步骤
1. 回答 why 提问,优先选用 because
2. 句首表示 “既然” 用 since;表示 “由于” 用 as
3.❗because 与 so 不能同时共存,二选一
第四部分、背诵小结口诀
条件从句 if 引导,主将从现要记牢;
if 表如果用现三,if 表是否用将来;
unless 等于 if not,从句否定不要再;
because 回答 why,语气最强别忘怀;
since 既然 as 由于,because 不和 so 同在。
语法知识精练
一、单项选择
1.Listening to light music before going to bed is helpful, ________ it calms the mind and improves sleep quality.
A.unless B.although C.because D.until
2.—Why do you look tired? —________ I stayed up late to finish my homework last night.
A.Because B.So C.But D.And
3.You will never know what you can do ________ you try your best.
A.if B.unless C.because D.though
4.Jim bought Della an expensive set of combs, ________ he had sold his watch.
A.unless B.because C.but D.though
5.The river has become much clearer ________ the villagers have made great efforts to protect it.
A.if B.unless C.because D.though
6.We respect Fan Jinshi ________ she gave up city comfort for caves.
A.if B.though C.because D.unless
7.I admire Zhong Yang ________ he spent his whole life collecting plant seeds.
A.so B.because C.but D.though
8.—Why does plastic bring great danger to sea animals?
—________ lots of plastic waste ends up in oceans and cannot break down easily.
A.So B.But C.Because D.Though
9.He didn’t pass the exam ________ he was too careless.
A.so B.because C.for D.since
10.________ it was Sunday, he didn’t need to go to school.
A.For B.As C.Though D.Unless
11.—Mother’s Day is coming. Shall we make a big dinner for Mum?
—Good idea! But please give me some guidance, ________ I don’t know how to cook.
A.though B.but C.as D.while
12.—Why do you like eating the Wenchang chicken?
—I like it ________ its meat tastes very tender (嫩的).
A.because B.if C.since D.as
13.— Why did you decide to walk to school today, Tom?
—________ it’s such a lovely sunny morning, I wanted to enjoy the fresh air.
A.As B.Due to C.For example D.While
14.It’s hard for us to say goodbye ________ we have so many happy days to remember.
A.so B.until C.although D.because
15.Read the sentence, “I think they’re not coming for they haven’t replied to the invitation.” The underlined word “for” is used to ________.
A.show time B.show a reason C.express a result D.give an example
16.________ the way to learn English is different for everyone, we’d better find our own suitable methods.
A.Since B.Because of C.Although D.But
17.Zhan Haojing felt less close to the art ________ some people thought it was old-fashioned.
A.if B.because
C.when D.although
18.We will go to the book fair ________ it rains.
A.if B.unless C.because D.so
19.We won’t enjoy the beauty of the poem ________ we read it carefully and feel it with heart.
A.if B.unless C.so D.because
20.________ you keep working hard and never give up, you will realize your dream one day.
A.As long as B.As soon as C.Even though D.Unless
21.—What’s your opinion on teenage problems?
—________ we talk to our parents or teachers, we can’t solve them easily.
A.If B.Unless C.Because D.Though
22.It is good for your health ________ you take a walk after supper.
A.until B.if C.although D.unless
23.Tom, why don’t you join us for dinner tonight? ________ you come, you will have a good time.
A.If B.Unless C.Until D.Because
24.I’m sure you can learn English well ________ you don’t give up.
A.as soon as B.as often as C.as long as D.as hard as
25.If you keep working hard, your dream will eventually ________.
A.come true B.come up C.come on D.come in
26.You can’t go out to play ________ you finish your homework first.
A.if B.unless C.when D.after
27.You will be healthier ________ you take exercise every day.
A.unless B.if C.though D.because
28.________ you try your best, you won’t know what you can achieve.
A.If B.Unless C.Because D.When
29.Fish will die ________ there is no water.
A.if B.unless C.though D.because
30.You can live a happy life ________ you eat a balanced diet and think positively.
A.if B.unless C.although D.because
31.Many teenagers like rock music ________ it is full of energy.
A.though B.because C.but D.so
32.I can’t go hiking with you ________ I have a lot of homework to do today.
A.though B.until C.because D.unless
33.—What makes you so happy, Tom?
—________ I got an “A” in the English test.
A.Because B.Since C.As D.For
34.________ 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
35.— I hope I can take part in the game show Who is Still Standing and win a big ________.
— In your dreams. You will win nothing ________ you spend a few months preparing for it.
A.praise; since B.praise; unless C.prize; since D.prize; unless
36.You won’t pass the English exam ________ you study hard for it.
A.unless B.because C.although D.so
37.We will go to the park if it ________ tomorrow.
A.won’t rain B.doesn’t rain C.isn’t rain D.don’t rain
38.Call me at once ________ you arrive there.
A.if B.unless C.though D.because
39.If you ________ the book carefully, you ________ it very interesting.
A.read; will find B.will read; find C.read; find D.will read; will find
40.________ you work harder, you will fall behind other students.
A.If B.Unless C.Because D.When
2
同步新教材,周周有练习,月月有重点!
1
同步新教材,周周有练习,月月有重点!
学科网(北京)股份有限公司
$2026-2027学年一线教师制作新教材英语同步精品系列资料,名师遴选!
2026-2027学年一线教师制作新教材英语同步精品系列资料,名师遴选!
学校:___________姓名:___________班级:___________考号:___________
Unit 1 Teenagers today
重点语法:条件状语从句和原因状语从句精讲精练
语法知识精讲
📌总览
状语从句:用一个完整句子充当状语,修饰主句的动作,表达条件、原因、时间等逻辑。
条件状语从句:表 “假如、如果”;原因状语从句:表 “因为”。
第一部分 条件状语从句精讲(if 引导)
一、基本概念
✅条件状语从句:由连词 if(如果)、unless(除非,如果不)引导,表示某动作发生的前提条件。
句子结构:主句 + 引导词 + 条件状语从句
例句:
If you work hard, you will pass the exam.
如果你努力学习,你将会通过考试。
二、核心语法规则:主将从现❗【中考最高频】
🔴主将从现规则:
1. 主句:一般将来时(will / shall / be going to)
2. if / unless引导的条件从句:用一般现在时表将来,不能使用将来时!
✅ If it is fine tomorrow, we will go hiking.
如果明天天气好,我们就去远足。
❌ If it will be fine tomorrow, we will go hiking.(错误,从句不能用 will)
拓展 “主将从现” 另外两种情况
主句时态
从句时态
例句
主句为祈使句
从句一般现在时
Work hard if you want to succeed. 如果你想成功就努力。
主句含情态动词 (can/must/should)
从句一般现在时
You can stay here if you finish your homework. 如果你完成作业就可以待在这里。
📝口诀:主句将来 / 祈使 / 情态,从句一般现在表将来
三、引导词 if 和 unless 辨析
引导词
含义
逻辑等价转换
例句
if
如果
—
If you exercise, you will be healthy. 如果你锻炼,你会很健康。
unless
除非;如果不
= if…not
Unless you hurry up, you will be late.
= If you don’t hurry up, you will be late.
除非你快点,否则你会迟到。
⚠️注意:unless 本身已经带有否定含义,从句不要再加 not!
❌ Unless you do not try, you won’t know.
四、if 的两个身份,务必区分【易混陷阱】
1.if = 如果 → 引导条件状语从句,遵循主将从现
I will go if he comes. 如果他来,我就去。
2.if = 是否 → 引导宾语从句,时态根据实际情况,不遵循主将从现
I don’t know if he will come tomorrow.
我不知道他明天是否会来。(宾语从句,tomorrow 表将来,用 will come)
💡做题小技巧:翻译句子,翻译为如果→条件状语从句;翻译为是否→宾语从句。
第二部分 原因状语从句精讲
一、基本概念
✅原因状语从句:由 because, since, as 引导,用来解释主句动作发生的原因。
结构:主句 + 原因引导词 + 原因从句;引导词也可以放在句首。
二、三大引导词辨析(重点)
连词
语气强弱
用法说明
例句
because
最强⭐⭐⭐⭐⭐
直接回答 why 提问;重点强调原因;可放句首、句中
He didn’t go to school because he was ill.
他没上学,因为他生病了。
since
中等⭐⭐⭐
既然;用于已知、显而易见的理由,常放句首
Since you are tired, you can have a rest.
既然你累了,你可以休息一会。
as
较弱⭐⭐
由于;双方都知晓的原因,多用于句首
As it rained, we stayed at home.
由于下雨,我们待在家里。
🟥【中考改错必考点】
because 和 so 绝对不能同时出现在一个句子当中,二者只能选其一!
❌ Because he was ill, so he didn’t come.
✅ Because he was ill, he didn’t come.
✅ He was ill, so he didn’t come.
补充:for 是并列连词,也可以表 “因为”,不能放句首,放在两个分句中间,表补充推测,不属于状语从句。
He must be at home, for the light is on. 他一定在家,因为灯亮着。
三、why 和 because 的问答
—Why were you late? 你为什么迟到?
—Because I missed the bus. 因为我错过了公交车。
✨回答 why 的提问,只能用 because,不能用 since/as。
第三部分 解题做题步骤
✅条件状语从句做题步骤
1. 看到 if,先翻译:译为如果→条件状语从句;译为是否→宾语从句
2. 条件状语从句牢记:主句将来 / 祈使 / 情态,从句用一般现在时,拒绝 will
3. 看到 unless,可以替换成 if…not 帮助理解;注意 unless 自带否定含义,不要再加 not
✅原因状语从句做题步骤
1. 回答 why 提问,优先选用 because
2. 句首表示 “既然” 用 since;表示 “由于” 用 as
3.❗because 与 so 不能同时共存,二选一
第四部分、背诵小结口诀
条件从句 if 引导,主将从现要记牢;
if 表如果用现三,if 表是否用将来;
unless 等于 if not,从句否定不要再;
because 回答 why,语气最强别忘怀;
since 既然 as 由于,because 不和 so 同在。
语法知识精练
一、单项选择
1.Listening to light music before going to bed is helpful, ________ it calms the mind and improves sleep quality.
A.unless B.although C.because D.until
【答案】C
【详解】句意:睡前听轻音乐是有益的,因为它能平复情绪并提升睡眠质量。
unless除非;although虽然、尽管;because因为;until直到。根据逻辑关系,后文是对前文“睡前听轻音乐有益”的原因解释,应选用because引导原因状语从句。
2.—Why do you look tired? —________ I stayed up late to finish my homework last night.
A.Because B.So C.But D.And
【答案】A
【详解】句意:——你为什么看起来很累?——因为我昨晚熬夜完成作业了。
Because因为;So所以;But但是;And和。根据问句“Why do you look tired?”可知,对方询问原因,回答应用Because引导原因状语从句来解释理由。
3.You will never know what you can do ________ you try your best.
A.if B.unless C.because D.though
【答案】B
【详解】句意:除非你尽最大努力,否则你永远不会知道你能做什么。
if如果;unless除非;because因为;though虽然。根据“You will never know what you can do... you try your best.”可知,句中包含否定词never,表示“如果不尽力尝试,就不会知道”,unless引导条件状语从句,符合语境。
4.Jim bought Della an expensive set of combs, ________ he had sold his watch.
A.unless B.because C.but D.though
【答案】B
【详解】句意:吉姆给黛拉买了一套昂贵的梳子,因为他卖掉了自己的手表。
unless除非;because因为;but但是;though虽然。前后两个分句是因果关系,“he had sold his watch(他卖掉了自己的手表)”是吉姆买梳子的原因。
5.The river has become much clearer ________ the villagers have made great efforts to protect it.
A.if B.unless C.because D.though
【答案】C
【详解】句意:这条河变得清澈多了,因为村民们已经做出了巨大的努力来保护它。
if如果;unless除非;because因为;though虽然。分析句子可知,前半句“河流变清澈”是结果,后半句“村民努力保护”是原因,前后构成因果关系,应用because引导原因状语从句。
6.We respect Fan Jinshi ________ she gave up city comfort for caves.
A.if B.though C.because D.unless
【答案】C
【详解】句意:我们尊敬樊锦诗,因为她为了石窟/洞窟放弃了城市的舒适生活。
if如果;though虽然;because因为;unless除非。根据“she gave up city comfort for caves”可知,后半句是前半句“We respect Fan Jinshi”的原因,前后构成因果关系,应用表示原因的连词because。
7.I admire Zhong Yang ________ he spent his whole life collecting plant seeds.
A.so B.because C.but D.though
【答案】B
【详解】句意:我敬仰钟扬,因为他一生都在收集植物种子
so所以;because因为;but但是;though虽然。根据句意可知,前半句“我敬仰钟扬”是结果,后半句“他一生都在收集植物种子”是原因,前后句之间存在因果关系,应用because引导原因状语从句。
8.—Why does plastic bring great danger to sea animals?
—________ lots of plastic waste ends up in oceans and cannot break down easily.
A.So B.But C.Because D.Though
【答案】C
【详解】句意:——为什么塑料给海洋动物带来巨大危险?——因为大量塑料垃圾最终进入海洋且不易分解。
So所以;But但是;Because因为;Though虽然。根据疑问词“Why”可知,问句询问原因,要用Because来回答原因。
9.He didn’t pass the exam ________ he was too careless.
A.so B.because C.for D.since
【答案】B
【详解】句意:他没有通过考试,因为他太粗心了。
so所以;because因为(强调直接原因);for因为(补充说明,不用于句首);since既然。“He didn’t pass the exam”的直接原因是“太粗心”,应用because引导原因状语从句。
10.________ it was Sunday, he didn’t need to go to school.
A.For B.As C.Though D.Unless
【答案】B
【详解】句意:因为那天是星期天,他不需要去上学。
For因为(不位于句首,常用于解释);As因为(可位于句首,表示明显原因);Though虽然;Unless除非。“it was Sunday”是不上学的原因,原因明显,应填As。
11.—Mother’s Day is coming. Shall we make a big dinner for Mum?
—Good idea! But please give me some guidance, ________ I don’t know how to cook.
A.though B.but C.as D.while
【答案】C
【详解】句意:——母亲节快到了,我们给妈妈做一顿丰盛的晚餐好吗?——好主意!但请给我一些指导,因为我不会做饭。
though虽然;but但是;as因为;while当……时。前半句提出需要指导,后半句“I don’t know how to cook”是给出需要指导的原因,as此处引导原因状语从句;though表让步,but表转折,while引导时间或对比状语,均不符合句子逻辑。
12.—Why do you like eating the Wenchang chicken?
—I like it ________ its meat tastes very tender (嫩的).
A.because B.if C.since D.as
【答案】A
【详解】句意:——你为什么喜欢吃文昌鸡?——我喜欢它是因为它的肉质吃起来十分鲜嫩。
because因为;if如果;since既然;as由于。问句用Why(为什么)提问原因,回答针对直接的因果关系说明理由时,用because引导原因状语从句。
13.— Why did you decide to walk to school today, Tom?
—________ it’s such a lovely sunny morning, I wanted to enjoy the fresh air.
A.As B.Due to C.For example D.While
【答案】A
【详解】句意:——汤姆,你今天为什么决定步行去上学? ——因为这是一个如此美好的晴朗早晨,我想要呼吸新鲜空气。
As因为;Due to由于;For example例如;While当……时候。根据答句要表达原因,且后面接句子,As可引导原因状语从句。
14.It’s hard for us to say goodbye ________ we have so many happy days to remember.
A.so B.until C.although D.because
【答案】D
【详解】句意:对我们来说很难说再见,因为我们有这么多快乐的日子值得回忆。
so所以;until直到;although虽然;because因为。根据“It’s hard for us to say goodbye ”与“we have so many happy days to remember”可知,后句是前句的原因,此处表示因果关系,应用表示原因的连词。应选D。
15.Read the sentence, “I think they’re not coming for they haven’t replied to the invitation.” The underlined word “for” is used to ________.
A.show time B.show a reason C.express a result D.give an example
【答案】B
【详解】句意:读句子“我认为他们不会来了,因为他们还没有回复邀请函。”划线单词“for”用来表示原因。
show time表示时间;show a reason表示原因;express a result表达结果;give an example举例子,句中for用来引出他们不会前来的理由,表示“因为”,应填show a reason。
16.________ the way to learn English is different for everyone, we’d better find our own suitable methods.
A.Since B.Because of C.Although D.But
【答案】A
【详解】句意:既然每个人学习英语的方法是不同的,我们最好找到适合自己的方法。
Since既然/因为;Because of因为;Although虽然;But但是。根据空后“the way to learn English is different for everyone”是一个完整的句子,排除后接名词或短语的Because of。前后句存在因果关系,因为方法不同,所以要找适合自己的方法。Since引导原因状语从句,符合语境。
17.Zhan Haojing felt less close to the art ________ some people thought it was old-fashioned.
A.if B.because
C.when D.although
【答案】B
【详解】句意:詹浩静觉得离这门艺术不那么亲近了,因为有些人认为它过时了。
if如果;because因为;when当……时候;although虽然。根据后半句“some people thought it was old-fashioned”可知,有些人认为艺术过时,是前半句“觉得不那么亲近”产生的原因,前后构成因果关系,应用because引导原因状语从句。
18.We will go to the book fair ________ it rains.
A.if B.unless C.because D.so
【答案】B
【详解】句意:除非下雨,否则我们会去书展。
if如果;unless除非;because因为;so所以。结合语句“We will go to the book fair…it rains”可知,句子表达不下雨就前往书展,unless引导条件状语从句,表示“除非”,符合句子逻辑。
19.We won’t enjoy the beauty of the poem ________ we read it carefully and feel it with heart.
A.if B.unless C.so D.because
【答案】B
【详解】句意:除非我们认真品读、用心感悟这首诗,否则我们体会不到它的诗意之美。
if如果;unless除非,相当于“if...not”;so所以;because因为。句子前半句意为我们无法领略诗歌的美,后半句是仔细阅读、用心感受诗歌,二者构成条件否定关系,只有unless代入逻辑通顺,其余连词语义均不符合句子逻辑。
20.________ you keep working hard and never give up, you will realize your dream one day.
A.As long as B.As soon as C.Even though D.Unless
【答案】A
【详解】句意:只要你持续努力、永不放弃,终有一天你会实现梦想。
As long as只要;As soon as一……就;Even though即使;Unless除非。分析句子逻辑关系,前半句“努力工作”是后半句“实现梦想”的条件。As long as引导条件状语从句,意为“只要”,符合语境。
21.—What’s your opinion on teenage problems?
—________ we talk to our parents or teachers, we can’t solve them easily.
A.If B.Unless C.Because D.Though
【答案】B
【详解】句意:——你对青少年问题有什么看法?——除非我们和父母或老师沟通,否则我们无法轻易解决这些问题。
If如果;Unless除非;Because因为;Though尽管。根据后半句“we can’t solve them easily”的否定语境,此处表达“除非满足沟通的条件,否则难以解决问题”的逻辑,应填Unless。
22.It is good for your health ________ you take a walk after supper.
A.until B.if C.although D.unless
【答案】B
【详解】句意:如果你晚饭后散步,它对你的健康有好处。
until直到;if如果;although虽然;unless除非。分析句子可知,后句“你晚饭后散步”是前句“对你的健康有好处”的肯定条件,应用if引导条件状语从句。
23.Tom, why don’t you join us for dinner tonight? ________ you come, you will have a good time.
A.If B.Unless C.Until D.Because
【答案】A
【详解】句意:汤姆,你今晚为什么不和我们一起吃晚餐呢?如果你来,你会玩得很开心。
If如果;Unless除非;Until直到……为止;Because因为。根据上文邀请晚餐及下文“you will have a good time”可知,此处表示假设条件,即“如果你来,就会玩得开心”,If符合语境。
24.I’m sure you can learn English well ________ you don’t give up.
A.as soon as B.as often as C.as long as D.as hard as
【答案】C
【详解】句意:我相信只要你不放弃,你就能学好英语。
as soon as一……就……,引导时间状语从句;as often as和……一样经常,表示频率;as long as只要;as hard as和……一样努力。根据句意可知,后半句是前半句实现的条件,不放弃是学好英语的前提条件,as long as表示条件关系,符合语境。
25.If you keep working hard, your dream will eventually ________.
A.come true B.come up C.come on D.come in
【答案】A
【详解】句意:如果你持续努力,你的梦想最终会实现。
come true实现;come up发生;come on加油;come in进入。根据主语“your dream”以及语境“keep working hard”可知,努力工作将会梦想成真,应填come true。
26.You can’t go out to play ________ you finish your homework first.
A.if B.unless C.when D.after
【答案】B
【详解】句意:你不能出去玩,除非你先完成你的家庭作业。
if如果;unless除非;when当……时候;after在……之后。根据前半句“You can’t go out to play”的否定限定逻辑,此处表达“只有完成作业才能出去玩”的条件含义,unless引导的条件状语从句完全契合该语境。
27.You will be healthier ________ you take exercise every day.
A.unless B.if C.though D.because
【答案】B
【详解】句意:如果你每天锻炼,你将会更健康。
unless除非;if如果;though虽然;because因为。根据“you take exercise every day”以及“You will be healthier”可知,此处是条件关系,表示如果,应填if。
28.________ you try your best, you won’t know what you can achieve.
A.If B.Unless C.Because D.When
【答案】B
【详解】句意:除非你尽最大努力,否则你不会知道自己能取得什么样的成就。
If如果;Unless除非;Because因为;When当……时候。根据后句“you won’t know what you can achieve”的否定结果逻辑可知,此处表示“除非尽全力,否则无法知晓自身潜力”的条件关系,应填Unless。
29.Fish will die ________ there is no water.
A.if B.unless C.though D.because
【答案】A
【详解】句意:如果没有水,鱼就会死。
if如果;unless除非;though尽管;because因为。根据前句“Fish will die”的结果逻辑可知,此处表示“没有水”是鱼死亡的假设前提条件,应填if。
30.You can live a happy life ________ you eat a balanced diet and think positively.
A.if B.unless C.although D.because
【答案】A
【详解】句意:如果你饮食均衡且积极思考,你就能过上幸福的生活。
if如果;unless除非;although虽然;because因为。根据“you eat a balanced diet and think positively”可知这是过上幸福生活的条件,表示“如果”,应填if。
31.Many teenagers like rock music ________ it is full of energy.
A.though B.because C.but D.so
【答案】B
【详解】句意:许多青少年喜欢摇滚乐,因为它充满活力。
though虽然;because因为;but但是;so所以。根据“Many teenagers like rock music...it is full of energy.”可知,前半句“喜欢摇滚乐”是结果,后半句“充满活力”是原因,前后构成因果关系,应用because引导原因状语从句。
32.I can’t go hiking with you ________ I have a lot of homework to do today.
A.though B.until C.because D.unless
【答案】C
【详解】句意:我不能和你去远足,因为我今天有很多作业要做。
though虽然;until直到;because因为;unless除非。后半句在解释不能远足的原因,用because引导原因状语从句。
33.—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
【详解】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表示原因时通常不放在句首。
34.________ 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
【详解】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。
35.— I hope I can take part in the game show Who is Still Standing and win a big ________.
— In your dreams. You will win nothing ________ you spend a few months preparing for it.
A.praise; since B.praise; unless C.prize; since D.prize; unless
【答案】D
【详解】句意:—— 我希望能参加益智节目《一站到底》并赢得丰厚的奖品。 —— 做梦去吧。除非你花几个月准备,否则你什么都得不到。
praise赞扬;prize奖品;since自从、既然;unless除非。结合语句“I hope I can take part in the game show Who is Still Standing and win a big …”可知,参加竞赛节目想要赢得的是奖品,应选用prize;结合语句“You will win nothing … you spend a few months preparing for it”可知,此处表达除非付出准备,否则一无所获,unless引导条件状语从句,符合句子逻辑。
36.You won’t pass the English exam ________ you study hard for it.
A.unless B.because C.although D.so
【答案】A
【详解】句意:你不会通过英语考试,除非你为之努力学习。
unless除非(引导条件状语从句);because因为(引导原因状语从句);although虽然(引导让步状语从句);so所以(引导结果状语从句)。主句“You won’t pass”表示否定结果,从句“you study hard”是条件,需用unless引导条件状语从句,意为“除非”,符合语境。应填unless。
37.We will go to the park if it ________ tomorrow.
A.won’t rain B.doesn’t rain C.isn’t rain D.don’t rain
【答案】B
【详解】句意:如果明天不下雨,我们就去公园。
句中if引导条件状语从句,遵循“主将从现”规则,从句主语it是第三人称单数,实义动词rain的否定形式需借助助动词doesn’t,应填doesn’t rain。
38.Call me at once ________ you arrive there.
A.if B.unless C.though D.because
【答案】A
【详解】句意:如果你到那儿,立刻给我打电话。
if如果;unless除非;though虽然;because因为。根据主句“Call me at once”可知,此处表示“如果到达那里就打电话”,if引导条件状语从句,符合语境。应填if。
39.If you ________ the book carefully, you ________ it very interesting.
A.read; will find B.will read; find C.read; find D.will read; will find
【答案】A
【详解】句意:如果你认真读这本书,你将会发现它很有趣。
read读书;find发现。“if”引导的条件状语从句,遵循“主将从现”原则,“if”引导的从句用一般现在时,故填“read”;主句用一般将来时,故填“will find”。
40.________ you work harder, you will fall behind other students.
A.If B.Unless C.Because D.When
【答案】B
【详解】句意:除非你更加努力,否则你会落后于其他学生。
If如果;Unless除非;如果不;Because因为;When当……时候。根据后半句“you will fall behind other students”可知,结果是落后的,前半句是努力,逻辑关系应为“如果不努力就会落后”,Unless 意为“除非,如果不”,引导条件状语从句,符合语境。
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同步新教材,周周有练习,月月有重点!
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同步新教材,周周有练习,月月有重点!
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