/ 让学习更有效 新课备课备考 | 英语学科
2025年外研版九年级英语上册精讲精练
Unit 6 Problems
核心语法:unless的用法
一、 核心含义与词性
词性: 从属连词 (Subordinating Conjunction)
含义: 除非;如果不 (except if; if...not)
功能: 引导条件状语从句,表示“除非发生A,否则会发生B”或“如果不发生A,就会发生B”。
二、 基本用法与句型结构
unless 引导的条件状语从句,可以放在主句之前或之后。放在主句之前时,常用逗号隔开。
句型 1: [主句] + unless + [条件从句]
You will be late unless you hurry up.
(除非你快点,否则你会迟到。)
句型 2: Unless + [条件从句], + [主句]
Unless you hurry up, you will be late.
(除非你快点,否则你会迟到。)
三、 核心语法规则:“主将从现”
当 unless 引导的从句表示将来时间时,主句用将来时(或含有情态动词),而 unless 引导的从句必须用一般现在时来表示将来。这一点与 if 引导的条件句规则完全相同。
公式:
Unless + 主语 + 一般现在时..., 主语 + will/can/may/must + 动词原形...
Unless it rains tomorrow, we will go hiking.
(除非明天下雨,否则我们就去徒步。)
You can't improve your English unless you practice every day.
(除非你每天练习,否则你无法提高你的英语水平。)
Unless you have a ticket, you can't get in.
(除非你有票,否则你不能进入。)
常见错误:
~~Unless it will rain tomorrow, we will go hiking.~~ (错误!从句中不能使用 will)
四、 unless 与 if...not 的转换(重中之重)
在绝大多数情况下,unless 和 if...not 可以互换,但语气和侧重点略有不同。
转换公式:
unless + 肯定句从句 = if + 否定句从句
Unless you study hard, you will fail the exam.
= If you do not study hard, you will fail the exam.
(除非你努力学习,否则你会考试不及格。/ 如果你不努力学习,你就会考试不及格。)
Don't call me unless it's an emergency.
= Don't call me if it is not an emergency.
(除非是紧急情况,否则别给我打电话。/ 如果****不是紧急情况,就别给我打电话。)
细微区别:
unless 更常用于“警告”或“说明规则”,语气较强。
You'll be sick unless you stop eating. (警告)
if...not 的使用范围更广,更口语化。
五、 使用 unless 的注意事项
1、unless 引导的从句必须是“肯定的”:
unless 本身已含有否定意义“除非...不”,所以它后面的从句动词要用肯定形式。
除非他邀请我,否则我不会去。
(正) I won't go unless he invites me.
(误) ~~I won't go unless he doesn't invite me.~~
2、何时不能用 unless?
当所述条件是“虚拟的”或“假想的”(即与事实相反)时,只能用 if...not,不能用 unless。
如果昨天不是那么忙的话,我就来看你了。(与过去事实相反,是虚拟条件句)
(正) I would have come to see you if I hadn't been so busy yesterday.
(误) ~~...unless I had been so busy yesterday.~~ (逻辑不通)
六、 总结
要点 说明 示例
含义 除非;如果不 You'll fail unless you try.
时态 主将从现 Unless he runs, he will miss the bus.
转换 unless + 肯定句 = if + 否定句 unless you go = if you don't go
从句形式 从句动词永远用肯定形式 ~~unless he doesn't come~~
unless he comes
禁忌 虚拟条件句中不能用 unless I would go if I weren't tired. (虚拟句)
掌握 unless 的关键在于两点:1. 牢记它等价于 if...not;2. 在条件句中严格遵循 “主将从现” 的时态规则。
1.I won't go to Tina's birthday party unless I ________.
A.am inviting B.will be invited
C.was invited D.am invited
2. Unless it ____, we will play the game.
A.rain B.rains C.rained D.will rain
3. Even if you learn something well, you'll forget it ____ you use it.
A.or B.and C.unless
4.The film seems interesting ______ we all want to see it.
A.and B.but C.unless D.if
5. —Let's go bike riding next Sunday, shall we
—Good idea, unless it ____.
A.rains B.doesn't rain C.will rain D.won't rain
6.—Let's go bike riding next Sunday, shall we
—Good idea, unless it ______.
A.rains B.doesn't rain C.will rain D.won't rain
7.Be active to our life because victory ________ come to us unless we go to it.
A.used to B.won't C.must
8.—Is he going to the party
—No. He won't take part in it unless he ________ to.
A.isn't invited B.is invited
C.will invited D.will be invited
9. — Do you think ____ she has taken the book on your table
— ____ I'm mistaken.
A.that; Unless B.whether; Unless
C.that; If D.whether; If
10. I can't play basketball after school unless my homework____.
A.is finished B.will be finished C.finished
11.The little boy won't go to sleep unless his mom ________ a story.
A.tells B.told C.is telling D.will tell
12. ____ the whole of this article ____ any part of it will be published unless the writer agrees.
A.Either; or B.Neither; nor
C.Not only; but also D.Both; and
13.—Will you go to Sandy's birthday party
—I'm not sure. I won't go there unless ________.
A.I will be invited B.I'm invited
C.I was invited D.I have been invited
14.You won't achieve your dreams ________ you work hard. Let's study together and make progress every day.
A.if B.unless C.or D.but
15. You won't have a better view of the village ____ you reach the top of the hill.
A.because B.if C.unless D.but
16. Miss Xu goes jogging in Huanghe Park every morning ____ it rains.
A.unless B.till C.since D.as
17.Sally never feels lonely ________ she lives thousands of miles away from her hometown.
A.if B.though C.unless
18.________ we take action now, we can lower pollution in our city.
A.If B.Unless C.Although
19.—I won't come to the party unless Tom ________.
—You mean if Tom comes, you'll come
A.will invite B.invites C.invited D.is invited
20.Unless it ______, we'll visit Hangzhou Wild Animal Park this weekend.
A.rains B.will rain C.doesn't rain D.isn't raining
21.I won't get to the party on time ________ I catch the first train tomorrow morning.
A.unless B.if C.until
22. ____ the storm came, I was studying at hoe alone. I was really scared.
A.Since B.When C.Unless
23.I didn't know how much my parents love me ______ I grew up.
A.unless B.until C.if
24.—Your grandmother often dances in the square.
—Yes, ________ the bad weather stops her.
A.if B.unless C.because
25. Livestreaming sales(直播带货)are popular, ____ not all products meet quality standards.
A.so B.unless C.but D.because
26.—You needn't take an umbrella with you unless it ________ tomorrow.
—Yes, you are right.
A.is raining B.will rain C.rains D.rained
27.Paul is badly hurt on the playground. Don't move him _________ you know some first-aid knowledge.
A.unless B.if C.because D.after
28. I won't go to sleep ____ Mom tells me a bedtime story. Stories help me relax and fall asleep.
A.unless B.though C.because
29. — Michael, shall we go hiking in the mountains next Sunday
—OK, ____ it rains heavily.
A.when B.until C.unless D.if
30.________ you call me to say you're not coming, I'll see you at the theater.
A.Unless B.If C.Until
31. —What were you and your father doing at 7:00 yesterday evening
—I was cleaning my room ____ my father was reading newspapers.
A.until B.while C.unless· D.if
32. Please don't feed animals at the zoo, ____ the animal keeper allows you to do so.
A.if B.unless C.and D.but
33.We may face serious problems _______ we take better care of the Earth.
A.if B.unless C.though D.as
34.Please don't feed animals at the zoo, ________ the animal keeper allows you to do so.
A.if B.unless C.and D.but
35.— Lily, ________ you are free after school, let's go to the shop and buy a gift for Father.
—OK, Lucy. Tomorrow is Father's birthday. I almost forgot it.
A.until B.if C.unless
36. Small trees won't grow up into big ones ____ they experience lots of wind and rain.
A.if B.although C.unless D.when
37.I always sleep with the window open ________ it is really cold.
A.unless B.if C.because D.or
38.—What will you do on vacation
—My family will go to Yunnan ____ the weather is nice.
A.as B.if C.and D.unless
39.Betty's bike was broken, ________ she had to walk to the Capital Library.
A.or B.so C.because D.unless
40.—You mustn't go there on your own, because you _________ get lost in the mountains.
—OK. I will wait _________ you have time.
A.might; unless B.must; unless C.might; until D.must; until
41. I'm sure that you will succeed one day ____ you don't give up easily.
A.unless B.or C.but D.if
42.You won't feel tired in the morning ________ you go to bed earlier.
A.if B.although C.unless
43.______ he failed the competition again, he never gives up.
A.If B.Although C.Unless
44. Al helps us a lot. ____ we shouldn't lose our own creativity.
A.until B.but C.because D.unless
45. Learning about new things in technology is really important ____ the world is always changing.
A.so B.until C.unless D.since
46. Tom won't go to Mary's birthday party unless he____ .
A.will be invited B.has been invited C.is invited
47.Work harder, __________ you'll realize your dreams in the future.
A.or B.and C.unless D.since
48.—Would you like to go to see a film with me tonight, Jenny
—I'm afraid I can't go with you ________ I finish my report.
A.unless B.because C.when
49. — Would you like to go to see a film with me tonight,Jenny?
—I'm afraid I can't go with you____ I finish my report.
A.unless B.because C.when
50.Many hands make the fire work. ________ will be achieved unless we work well together.
A.Nothing B.Anything C.Something D.Everything
参考答案及试题解析
1.D
2.B
【解析】句意:除非下雨,否则我们将玩游戏。分析句子结构可知,本句是unless引导的条件状语从句,主句we will play the game使用了将来时,根据主将从现的时态规则,即如果主句是将来时或表示将来含义时,那么时间状语从句和条件状语从句用一般现在时,从句的时态应该是一般现在时,从句主语为it,第三人称单数,选项rains最符合题意,故选B。
【点评】考查条件状语从句。注意条件状语从句遵循主将从现的时态规则。
3.C
【解析】句意:即使你把某样东西学得很好,你也会忘记它,除非你使用它。A:or"或者,否则";B :and"和;并且",用于连接两个并列的成分或句子,强调并列关系;C:unless"除非,如果不",引导条件状语从句。结合句意,____ you use it应是条件状语从句,表示"如果不使用它",故选C。
【点评】考查unless引导的条件状语从句,注意结合句子间的意思来选择连词。
4.A
5.A
【解析】句意:——让我们下周日去骑自行车吧,好吧?——好主意,除非下雨。A是动词的第三人称单数,B是一般现在时的否定句,C一般将来时,D一般将来时的否定句,unless引导的条件状语从句,从句用一般现在时,根据常识不下雨,才能去骑自行车,unless意思是除非,如果不,从句是肯定句,A符合题意,故选A。
【点评】考查unless引导的条件状语从句和一般现在时。注意unless引导的主从句的时态。
6.A
7.B
8.B
9.A
10.A
【解析】句意:放学后我不能打篮球,除非我的作业被完成。is finished一般现在时的被动语态;will be finished—般将来时的被动语态;finished一般过去时。根据题干可知, 主语 homework"作业"与谓语动词finish"完成"之间是被动关系,应该使用被动语态;在条件状语从句中,主句用一般将来时,从句用一般现在时表将来。一般现在时的被动语态结构为 am/ is/are+动词的过去分词。故选A。
【点评】考查一般现在时的被动语态。掌握一般现在时被动语态的结构和用法是解答本题的关键。
11.A
【解析】句意:这个小男孩不会睡觉除非他妈妈给他讲个故事。在条件状语从句中,遵循主将从现的原则。此句中主句The little boy won't go to sleep是一般将来时的否定形式,从句unless his mom…a story要用一般现在时。从句的主语his mom是名词单数,tell a story讲故事,tell的第三人称单数形式是tells,故选A。
【点评】考查一般现在时和条件状语从句。注意条件状语从句时态遵循主将从现的原则。
12.B
【解析】句意:除非作者同意,否则这篇文章的全部或任何部分都不会被发表。A.Either; or要么……要么……;B.Neither; nor既不……也不……;C.Not only; but also不仅……而且……;D.Both; and……和……都。根据"unless the writer agrees(除非作者同意)"可推测,此处表示"全部或任何部分都不发表",表达两者都不用neither…mor…,故选B。
【点评】考查连词短语辨析。注意各短语的含义及用法,根据语境选择合适的短语。
13.B
14.B
15.C
【解析】句意:你不会有更好的村庄视野,除非你到达山顶。A.because(因为);B.if(如果);C.unless(除非);D.but(但是)。根据句意可知,"reach the top of the hill到达山顶"是"have a better view有更好视野"的条件,"unless"意为"除非",连接条件状语从句。符合语境,故选C。
【点评】考查连词辨析。理解连词引导的条件关系,区分unless与其他连词的含义。
16.A
【解析】句意:徐老师每天早上都去黄河公园慢跑,除非下雨。A.unless(除非);B.till(直到);C.since(自从);D.as(当……时)。根据"goes jogging...every morning(每天早上慢跑)"和"it rains(下雨)"可知,此处指"除非下雨",故选A。
【点评】考查连词辨析。根据前后句的逻辑关系确定连词。
17.B
18.A
19.D
20.A
【解析】 句意:除非下雨,我们这个周末将参观杭州野生动物园。if/unless引导的条件状语从句用一般现在时表示一般将来时,故排除BD两项。unless=if…….not“除非,如果……不”。结合句意,表示如果不下雨就去参观杭州野生动物园。unless表示否定意思,因此谓语用肯定形式。故选A。
【点评】考查时态的用法。
21.A
22.B
【解析】句意:暴风雨来临时,我正独自在家学习。我真的很害怕。Since自从;因为(表时间或原因)。When当……时(表时间点或时间段,引导时间状语从句)。Unless除非(表条件,相当于"if not")。根据句意可知,从句"the storm came(暴风雨来临)"是主句"I was studying at hoe alone.(在家学习)"的时间背景,需用when引导时间状语从句,表示"当……时"。故选B。
【点评】考查连词。连词可以表并列、承接、转折、因果、选择、假设、比较、让步等关系,要结合语境,选择合适连词用法。
23.B
24.B
25.C
【解析】句意:直播带销售很受欢迎,但并非所有产品都符合质量标准。 A: 所以;B: 除非;C: 但是;D: 因为。根据 Livestreaming sales(直播带货)are popular直播带销售很受欢迎,可知"并非所有产品都符合质量标准"和前半句形成了转折关系,应用转折连词but"但是",故选C。
【点评】考查转折连词。注意根据前后句的逻辑关系,选择合适的连词。
26.C
27.A
28.A
【解析】句意:我不会睡觉除非妈妈给我讲睡前故事。故事帮我放松入睡。A. unless(除非);B. though(尽管);C. because(因为)。根据句意可知,"won't go to sleep(不会睡觉)"的条件是"没讲故事","unless"表示"除非(=if not)",符合"除非讲故事,否则不睡觉"的逻辑,故选A。
【点评】考查连词辨析。注意"unless"引导条件状语从句的用法,等同于"if...not"的否定条件关系。
29.C
【解析】句意:—— 迈克尔,下周日我们去山里徒步旅行好吗?——好的,除非下大雨。 when当 时候;until直到;unless除非,如果不;if如果。根据it rains heavily(下大雨),结合选项可知讲的是除非下大雨,否则我们下周日我们去山里徒步旅行,所以用unless,故选C。
【点评】考查连词辨析,首先理解连词词义,然后根据关键词句it rains heavily确定连词,理解句意。
30.A
31.B
【解析】句意:——昨晚7点你和你父亲在做什么?——我在打扫房间,而我父亲在看报纸。A. until直到……为止,引导时间状语从句,强调动作持续到某一时间点。B.while当……时;而,引导时间状语从句(强调主从句动作同时进行)或表示对比。C. unless除非,引导条件状语从句(= if not)。D. if如果,引导条件状语从句。根据"What were you and your father doing"可知,问句询问过去某时刻正在进行的动作,答句需用连词连接两个同时进行的过去进行时动作("was cleaning"和"was reading")。while在此处表示"与此同时",强调两个动作同步进行,符合语境。故选B。
【点评】考查连词。连词可以表并列、承接、转折、因果、选择、假设、比较、让步等关系,要结合语境,选择合适连词用法。
32.B
【解析】句意:请不要在动物园喂动物,除非动物管理员允许你这样做。A. if如果;B. unless除非;C. and而且;D. but但是。根据句意,可知空格号的从句"the animal keeper allows you to do so动物管理员允许你这样做"是主句"Please don't feed animals at the zoo请不要在动物园喂动物 "的条件,应属条件状语从句;结合选项,可知unless(除非)符合句意要求,故选B。
【点评】考查状语从句,熟悉unless的特殊翻译——翻译成"除非"时,应在主句前加上"否则"。
33.B
34.B
【解析】句意:请不要在动物园投喂动物,除非动物管理员允许你这么做。if如果;是否;unless除非;and和;并且;but但是。根据"Please don't feed animals at the zoo"(请不要在动物园投喂动物)以及"the animal keeper allows you to do so"(动物管理员允许你这么做),可知"除非"管理员允许,否则不能投喂,"unless"符合逻辑关系。故选B。
【点评】考查连词词义辨析,注意分析句子间逻辑关系("不能投喂"和"管理员允许"的条件关系),准确分"if""unless""and""but"在语义和逻辑连接上的差异。
35.B
【解析】句意:——莉莉,如果你放学后有空,我们去商店给爸爸买份礼物吧。——好的,露西。明天是爸爸的生日,我差点忘了。until直到;if如果;unless除非。根据"you are free after school, let's go to the shop and buy a gift for Father."可知,前句是后句的肯定条件,如果莉莉有时间,她们才能一起去买礼物,应用if引导条件状语从句。故选B。
【点评】考查连词辨析和条件状语从句。注意if引导条件状语从句的用法。
36.C
【解析】句意:小树不会长成大树,除非它们经历很多风雨。A.if(如果);B.although(尽管);C.unless(除非);D.when(当……时)。根据"Small trees won't grow up into big ones(小树不会长成大树)"和"they experience lots of wind and rain(他们经历了很多风雨)"可知,此处表示"除非",C符合逻辑。故选C。
【点评】考查连词辨析。理解句子之间的逻辑关系,选择合适的连词表达条件或让步等关系。
37.A
38.B
【解析】句意:——假期你将要做什么?——如果天气好,我们一家将要去云南。as随着;if如果;and和;unless除非。根据"My family will go to Yunnan...the weather is nice"可知,后句是前句的条件,如果天气好,"我"们一家将要去云南。故选B。
【点评】考查连词辨析。句子上下文是判断连词正确性的重要依据。考生需要仔细阅读句子,理解句子之间的逻辑关系,从而推断出应该使用哪个连词。连词在不同句型中的用法可能会有所不同。考生需要掌握连词在简单句、并列句和复合句中的用法,以便在解题时能够准确判断句子的类型和连词的正确用法。
39.B
40.C
41.D
【解析】句意:如果你不轻易放弃我确信将来某一天你会成功。A.unless,连词,除非;B.or,连词,或者;C.but,连词,但是;D.if,连词,如果;根据" I'm sure that you will succeed one day…… you don't give up easily. "可知此处要表达如果你不轻易放弃我确信你会成功,故选D。
【点评】考查if引导的条件状语从句。注意unless相当于if not,识记if的用法。
42.A
【解析】句意:如果你早点睡觉,你早上就不会感到累了。if如果;although尽管;unless除非;根据"You won't feel tired in the morning ________ you go to bed earlier."可知 你早点睡觉,你早上就不会感到累了,可推测出此处是"如果",故选A。
【点评】考查连词辨析。注意:1. 分析句子结构。首先,明确空缺处前后是分句、短语还是单词,判断是否需要连词(如并列连词and/or/but)或从属连词(because/although/when)。若连接两个独立分句,需确认是并列关系(用逗号+并列连词)还是主从关系(用从属连词)。2. 识别逻辑关系。根据上下文判断逻辑类型:因果关系(therefore、because/since/as),转折关系(but/yet,although/even though),条件关系(unless(=if not), provided that),时间关系(while, as soon as)3. 排除干扰项。以词性、逻辑关系以及固定搭配为根据一一排除错误选项。4. 验证答案。将所选连词代入,检查是否通顺。
43.B
44.B
【解析】句意:人工智能帮了我们很多。但是我们不应该失去我们自己的创造力。A. "until"表示"直到……为止"。B. "but"表示"但是"。C. "because"表示"因为"。D. "unless"表示"除非"。根据句意可知,前后句是转折关系,表达"人工智能帮了我们很多。但是我们不应该……",要用转折连词"but"连接,故选B。
【点评】考查表转折关系的连词。连词可以表并列、承接、转折、因果、选择、假设、比较、让步等关系,要结合语境,选择合适连词用法。
45.D
【解析】句意:了解技术中的新事物非常重要,因为世界总是在变化。A.所以;B.直到;C.除非......否则......;D.因为。根据Learning about new things in technology is really important了解技术中的新事物非常重要,the world is always changing世界总是在变化,可知前后句表示因果关系,后句表示原因,所以用since,故选D。
【点评】考查连词辨析,首先识记连词词义,然后根据前后句句意确定连词。
46.C
【解析】句意:除非他受到邀请,否则汤姆不会去玛丽的生日晚会。A一般将来时被动语态,B现在完成时被动语态,C一般现在时被动语态,主句用一般将来时,遵循主将从现的原则,unless引导条件状语从句,从句用一般现在时,故选C。
【点评】考查时态,注意识记unless引导条件状语从句,从句用一般现在时的用法。
47.B
48.A
【解析】句意:——珍妮,今晚你想和我去看电影吗?——我恐怕跟你去不了,除非我完成报告。unless除非;because因为;when当……时。根据答句中的I'm afraid I can't go with you…I finish my report可以判断是指我恐怕跟你去不了,除非我完成报告,应用unless引导条件状语从句。故选A。
【点评】考查连词辨析,首先理解连词词义,然后根据前后句句意确定连词。
49.A
【解析】句意:—— 珍妮,今晚你愿意和我一起去看电影吗? —— 恐怕我不能和你一起去,除非我完成了我的报告。A.除非;B.因为;C.当……时候。根据前后句句意可知,此处表示否定条件的假设,用unless引导条件状语从句,故选A。
【点评】考查连词辨析和条件状语从句。注意unless引导条件状语从句的用法。
50.A
21世纪教育网(www.21cnjy.com)