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专题02 连词unless、as soon as 和so...that
一、基本用法
1. unless引导的状语从句
unless为连词，意为“除非；如果不”，引导条件状语从句，相当于if…not。若主句为一般将来时、祈使句或谓语中含有情态动词时， unless引导的条件状语从句用一般现在时表示将来。
Unless it rains tomorrow, we will go for a picnic.
=If it doesn't rain tomorrow, we will go for a picnic. 除非明天下雨，否则我们去野餐。
2. as soon as引导的状语从句
as soon as意为“一……就……”，引导时间状语从句，表示从句的动作一发生，主句的动作马上就发生。从句位于主句前、后均可；若主句用一般将来时，从句用一般现在时代替一般将来时。
I will do my homework as soon as I finish the meal. 我一吃完饭就会写作业。
3. so…that引导的状语从句
So…that意为“如此……以至于”，引导结果状语从句，其中so为副词，用来修饰其后的形容词或副词，说明其程度的大小。
He was so worried that he didn't sleep well last night. 他是如此焦虑以至于昨晚没睡好。
注意 such...that也可引导结果状语从句，但such修饰名词，其结构为：such（+冠词）+形容词+名词that从句。
That's such an easy question that even everyone can answer it. 那是一个如此简单的问题，以至于每个人都能回答它。
二、特殊用法
1. 当形容词为many/much/few/ little（少）时，要用so...that结构，即“so+many/much/few/ little+名词+that从句。”
He earns so little money that he can hardly feed his family. 他赚的钱很少，几乎不能养家糊口。
2. so...that...引导的结果状语从句可以和enough to do sth. 和too...to...结构转换。
（1）当that从句是肯定结构
①当that从句是肯定结构，that从句的主语与主句的主语相同时，可用“be+形容enough词+ to do sth. 结构把so... that复合句转化为简单句。
He was so clever that he could understand what I said.
=He was clever enough to understand what I said. 他很聪明，能理解我说的话。
②当that从句是肯定结构，且that从句的主语与主句的主语不相同时，可用...enough for sb. to do sth. 结构替换。
The question is so easy that I can work it out.
=The question is easy enough for me to workout. 这个问题很简单，我能算出来。
（2）当that从句是否定结构
①当that从句是否定结构，that从句的主语与主句的主语相同时，可与 too...to“be not+形容词+ enough to do sth.”结构互换。需要注意的是，“be not+形容词+enough to do sth.”中的形容词是so...that结构中形容词的反义词。
His brother is so young that he can't go to school.
=His brother is too young to go to school.
=His brother is not old enough to go to school.
他弟弟太小了，不能去上学。
②当that从句是否定结构，且that从句的主语与主句的主语不相同时，要用too.... for sb. to...结构替换。
The dress was so expensive that I could not buy it.
=The dress was too expensive for me to buy. 这条连衣裙太贵了，我不能买了。
3. so...that结构中的“so+形容词/副词”可以提至句首，以加强语气，但要注意用倒装语序。
So bright was the moon that flowers were bright as in the day. 在如此明亮的月光下，花儿像在白天一样鲜艳。
基础训练
一、单项选择
1．You can’t improve your spoken English _______ you practice it every day from now on.
A．as soon as B．unless C．if D．since
【答案】B
【详解】句意：你不能提高你的英语口语，除非你从现在起每天练习它。
考查连词辨析。as soon as一……就……；unless除非；if如果；since自从。根据“You can’t improve your spoken English…you practice it every day from now on.”可知，空后是否定条件，用unless引导。故选B。
2．Living in a fast-developing world, we will fall behind ________ we keep learning.
A．if B．since C．after D．unless
【答案】D
【详解】句意：生活在一个快速发展的世界里，除非我们不断学习，否则我们将落后。
考查连词辨析。if如果；since自从；after在……之后；unless除非。根据“we will fall behind…we keep learning”以及结合选项可知，此处指除非我们不断学习，否则我们将落后。故选D。
3．You will not succeed ______ you work even harder.
A．though B．if C．since D．unless
【答案】D
【详解】句意：除非你更加努力工作，否则你不会成功。
考查连词辨析。though虽然；if如果；since自从；unless除非。根据“You will not succeed…you work even harder.”可知，此处是unless引导的条件状语从句，意为“除非更加努力工作，否则不会成功”。故选D。
4．—Winter swimming is exciting, but one can’t do it ________ he or she has got some training.
—That’s right. It can be really dangerous.
A．while B．unless C．as soon as D．since
【答案】B
【详解】句意：——冬泳是令人兴奋的，但除非他或她接受了一些训练，否则是不行的。 ——没错！这真的很危险。
考查连词辨析。while当……的时候；unless 除非；as soon as一……就……；since因为，自从。根据“but one can’t do it...he or she has got some training”可知，除非他或她接受了一些训练，否则是不能去冬泳的，此处应用unless引导条件状语从句。故选B。
5．You will not improve your skills ________ you practice the violin over and over again.
A．since B．unless
C．if D．until
【答案】B
【详解】句意：除非你一遍又一遍地练习小提琴，否则你的技巧不会提高。
考查连词。since自从；unless除非；if如果；until直到。结合句意，你的技巧不会提高，应是在你没有反复练习的条件下，因此用连词unless引导条件状语从句，故选B。
6．Shanghai Legoland Discovery Centre has recently opened. It has a special rule that adults are not allowed to enter ________ they go with a child.
A．unless B．whenever C．though D．until
【答案】A
【详解】句意：上海乐高乐园探索中心最近开业了。它有一条特殊规定，除非成年人带着孩子去，否则不允许他们进入。
考查条件状语从句。unless除非，如果不，引导条件状语从句；whenever无论何时；though虽然；until直到。根据“adults are not allowed to enter”可知，成人不让进，除非带了孩子。故选A。
7．Please come on time unless you ________ ill.
A．will be B．are C．were D．be
【答案】B
【详解】句意：请准时来，除非你生病了。
考查unless引导的条件状语从句。unless引导的条件状语从句，从句应用一般现在时，主语是“you”后be动词用“are”。故选B。
8．________ you’ve tasted it, you can’t imagine how delicious the dishes are.
A．Because B．Although C．When D．Unless
【答案】D
【详解】句意：除非你尝过，否则你无法想象这些菜有多美味。
考查连词。Because因为；Although虽然；When当……时候；Unless除非。根据“...you’ve tasted it, you can’t imagine how delicious the dishes are.”可知，此处表示除非你尝过，否则你无法想象这些菜有多美味，为unless引导的条件状语从句，故选D。
9．We’ll visit Shanghai this Sunday ________ it rains or it’s very hot.
A．since B．if C．unless D．until
【答案】C
【详解】句意：如果不下雨或者天气不非常热，我们这周日将去上海参观。
考查从属连词辨析。since自……以来；if如果；unless除非，如果不；until直到……为止。根据“We’ll visit Shanghai this Sunday...it rains or it’s very hot.”可知，如果不下雨或不很热，我们就会去参观，空处需填一个连词unless引导条件状语从句。故选C。
10．—You won’t reach the school on time ________ you take a taxi.
—However, I don’t take enough money.
A．because B．so C．unless D．while
【答案】C
【详解】句意：——除非你乘出租车，否则你不能准时到达学校。——但是，我没有带足够的钱。
考查从属连词辨析。because因为；so因此；unless除非；while当……时。“you take a taxi”是“You won’t reach the school on time”的否定条件，用unless引导条件状语从句，故选C。
11．I couldn’t wait to share it with my parents ______ I got the exciting news.
A．until B．as soon as C．because D．though
【答案】B
【详解】句意：我一得到这个令人兴奋的消息，就迫不及待地和父母分享了。
考查连词辨析和时间状语从句。until直到……为止；as soon as一……就……；because因为；though虽然，尽管。根据句意可知，此句是说一得到好消息就和父母分享。故选B。
12．Please let me know ________ you get to the airport.
A．as soon as B．as good as C．as much as D．as far as
【答案】A
【详解】句意：你一到机场就请告诉我。
考查连词辨析。as soon as一……就……；as good as和……一样好；as much as和……一样多；as far as就……而言。根据“Please let me know … you get to the airport.”可知，此处是指一到达机场就告诉我，应用as soon as引导时间状语从句。故选A。
13．We are going to take a trip to Kunming ________ we save enough money.
A．so that B．as soon as C．ever since D．even if
【答案】B
【详解】句意：我们一攒够钱，就要去昆明旅游。
考查从属连词辨析。so that因此；as soon as一……就……；ever since自从；even if即使。根据“we save enough money”可知，一攒够钱就去旅游，因此应用as soon as引导时间状语从句。故选B。
14．—Lucy, could you help me do the dishes
—Sure. I’ll do it ________ I finish my homework.
A．unless B．because C．as soon as D．as long as
【答案】C
【详解】句意：——露西，你能帮我洗碗吗？——当然。我一做完作业就去做。
考查连词辨析。unless除非；because因为；as soon as一……就……；as long as只要。根据“I’ll do it ... I finish my homework.”可知，我一做完作业就去洗碗，用as soon as引导时间状语从句。故选C。
15．I’ll go to visit my aunt in England ________ the summer holiday starts.
A．while B．before C．until D．as soon as
【答案】D
【详解】句意：暑假一开始，我就去英国看望我的姑姑。
考查连词辨析。while与……同时；before在……之前；until直到；as soon as一……就……。根据“I’ll go to visit my aunt in England…the summer holiday starts.”的句意可知，此处指暑假一开始，我就去英国看望我的姑姑，应用as soon as引导时间状语从句。故选D。
16．Your cousin will come to see you as soon as he ________ here tomorrow.
A．is arriving B．will arrive C．arrives D．arrived
【答案】C
【详解】句意：你表弟明天一到这里就来看你。
考查时态。as soon as表示“一……就……”，引导时间状语从句，遵循“主将从现”，从句时态用一般现在时；主语为he，动词要用第三人称单数。故选C。
17．—What do you think of the film
—It is ________ exciting ________ I’d like to see it again.
A．too; to B．such; that C．as; as D．so; that
【答案】D
【详解】句意：——你觉得这部电影怎么样？ ——太精彩了，我想再看一遍。
考查“so…that”的用法。too…to太……而不能……，too后常接形容词或副词，不定式to后接动词原形，表示否定；such…that如此……以至于，such后常接名词，that后常接从句；as…as同……一样，第一个as后常接形容词或副词，第二个as后常接名词或代词，用于两者之间的对比关系；so…that如此……以至于，后常接形容词或副词，that后常接从句。分析题干，答句第一空后的exciting“令人激动的”为形容词，第二空后为完整的句子，应用“so…that”引导结果状语从句，表示这部电影太精彩了以至于还想再看一遍。故选D。
18．The box is ___________ heavy that old Jack can’t carry it. Let’s go and help him.
A．very B．too C．so D．much
【答案】C
【详解】句意：这个箱子如此重，以至于老杰克搬不动它。我们去帮帮他吧。
考查结果状语从句。very非常；too太；so如此；much非常。根据“… heavy that old jack can’t carry it”可知，此处是指这个箱子如此重，以至于老杰克搬不动；考查so...that...“如此……以至于……”，引导结果状语从句。故选C。
19．There are ________ many people in the store that Peter doesn’t like to shop there.
A．very B．quite
C．such D．so
【答案】D
【详解】句意：在商店有如此多人以至于皮特不喜欢在那儿购物。
考查副词。very非常；quite相当；such如此；so如此。此句是“如此……以至于”的结果状语从句，由于横线后是many，所以是so...that。故选D。
20．—I am going to take this summer holiday in Taiwan.
—Oh, really Taiwan is ________ a beautiful place that ________ people in Guangdong go to visit it every year.
A．such; thousand B．so; thousands of C．such; thousands of D．such; thousand of
【答案】C
【详解】句意：——这个暑假我打算去台湾度假。——哦，真的吗？台湾是如此美丽的一个岛屿，以至于每年有成千上万的广东人去参观。
考查形容词和数词。such这样的；so如此；thousand千；thousands of成千上万的。第一空，such a/an+形容词+that+从句=so+形容词+a/an+单数可数名词+that+从句，表示“如此……以至于……”，因此第一空填such；第二空，此处表示成千上万的人，应用thousands of。故选C。
二、句型转换
1．They couldn’t stop to have a rest if they didn’t finish the work.（改为同义句）
They couldn’t stop to have a rest they the work.
【答案】 unless finished
【详解】句意：如果他们没有完成工作，就不能停下来休息。句子也可以改为“除非完成工作，否则他们不能停下来休息。”应用unless“除非”引导条件状语从句；finish“完成”，句子是一般过去时，动词用过去式。故填unless；finished。
2．Sun Wukong can turn himself into a person if he can hide his tail.（改为同义句）
Sun Wukong turn himself into a person he can hide his tail.
【答案】 can’t unless
【详解】句意：孙悟空如果能把他的尾巴藏起来，他就可以把自己变成一个人。原句用if引导的条件状语从句表示“如果孙悟空能把尾巴藏起来”，此处可以同义转换为not…unless…引导的条件状语从句，意为“除非……才……”。can的否定式为can’t。故填can’t；unless。
3．He is too young to go to school. (改为同义句)
He is young he can’t go to school.
【答案】 so that
【详解】句意：他太小了，不能上学。“too...to...”是一个固定结构，表示“太……而不能……”，可以用so+形容词+that从句“如此……以至于……”来替换，从句用否定句。故填so；that。
4．The girl got such a beautiful dress that she wore it all day. (改为同义句)
The girl got beautiful a dress she wore it all day.
【答案】 so that
【详解】句意：这个女孩得到了一件非常漂亮的衣服，她整天都穿着它。原句“such a+adj+名词单数+that+从句”可用“so+adj+a+名词单数+that+从句”替换，表示“如此……以至于……”。故填so；that。
5．Now the panda is old enough to protect itself.
Now the panda is old it protect itself.
【答案】 so that can
【详解】句意：现在熊猫已经足够大，可以保护自己了。be+adj.+enough to do sth.表示 “……足够做某事”，此结构可以和so...that...句型进行转换。根据“...it...protect itself.”可知，是熊猫能够保护自己，can “能，能够”。故填so；that；can。
提升训练
1．（23-24八年级下·上海浦东新·期末）The milk _________ bad unless you put it in the fridge.
A．doesn’t go B．go C．won’t go D．will go
【答案】D
【详解】句意：除非你把牛奶放进冰箱，否则它会变坏。
考查状语从句的时态。unless引导的条件状语从句表示“除非”，主句用一般将来时，从句用一般现在时。结合常识，牛奶不放在冰箱里会变坏，故主句需will go。故选D。
2．（23-24八年级下·河北唐山·期末）They will lose the game ________ they try their best.
A．since B．unless C．until D．before
【答案】B
【详解】句意：除非他们尽他们的最大努力，否则他们将会输掉这场比赛。
考查连词辨析。since自从，引导时间状语从句；unless除非，如果不，引导条件状语从句；until直到……才，引导时间状语从句；before在……之前，引导时间状语从句。根据“They will lose the game...they try their best.”可知，此处表示“除非努力，否则……”，应用unless引导条件状语从句，故选B。
3．（23-24八年级下·云南昆明·期末）I will not give up __________ I achieve my dream.
A．if B．unless C．but D．because
【答案】B
【详解】句意：我不会放弃，除非我实现了我的梦想。
考查连词辨析。if如果；unless除非；but但是；because因为。根据句子可知，后句是前句的否定条件，应用unless引导条件状语从句。故选B。
4．（23-24八年级下·河北张家口·期末）—Shall we go for a picnic in the forest park tomorrow
—Yes, ________ it rains heavily.
A．unless B．if C．as soon as D．until
【答案】A
【详解】句意：——明天我们去森林公园野餐好吗？——好的，除非下大雨。
考查unless引导条件状语从句。unless除非，引导条件状语从句；if如果，引导条件状语从句；as soon as一……就……；until直到，引导时间状语从句。根据“Yes”可知，同意去，除非下大雨才不去了，用unless表达否定的条件。故选A。
5．（23-24八年级下·甘肃张掖·期末）I won’t give my camera to you ________ you promise to bring it back by Saturday.
A．if B．unless C．because D．since
【答案】B
【详解】句意：我不会把我的相机给你，除非你要保证星期六前把它还回来。
考查连词。if如果；unless除非；because因为；since自从。结合句意，在你无法保证星期六前把它还回来的条件下，我不会把它给你的，因此用连词unless引导条件状语从句，故选B。
6．（23-24八年级下·西藏拉萨·期末）—May I go to the concert with you
— I’m afraid not _________ you have a ticket, because I have only one.
A．since B．as soon as C．unless D．even though
【答案】C
【详解】句意：——我可以和你一起去听音乐会吗？ ——我恐怕不行，除非你有票，因为我只有一张票。
考查连词辨析。since自从；as soon as一……就；unless除非；even though尽管。“you have a ticket”是“I’m afraid not”的否定条件，用unless引导条件状语从句。故选C。
7．（23-24八年级下·山东滨州·期末）You can’t get success __________ you keep working hard from now on
A．if B．unless C．though D．because
【答案】B
【详解】句意：除非你从现在开始继续努力，否则你不会成功。
考查连词辨析。if如果；unless除非；though尽管；because因为。空后“you keep working hard from now on”是空前“You can’t get success”的否定条件，所以用unless引导条件状语从句，故选B。
8．（23-24八年级下·山东青岛·期末）You can never know what’s possible ______ you try to make it happen.
A．as soon as B．but C．unless D．what
【答案】C
【详解】句意：你永远不知道什么是可能的，除非你努力去实现它。
考查连词辨析。as soon as一……就；but但是；unless除非；what什么。根据“You can never know what’s possible...you try to make it happen.”可知，题空前后句之间是条件关系，表示除非努力，否则永远不知道什么是可能的。故选C。
9．（23-24八年级下·云南曲靖·期末）No pain, no gain. We can achieve nothing ________ we keep going and never give up.
A．if B．unless C．so that D．as soon as
【答案】B
【详解】句意：没有付出，就没有收获。除非我们继续前进，永不放弃，否则我们将一事无成。
考查连词辨析。if如果；unless除非；so that以便；as soon as一……就。根据“We can achieve nothing...we keep going and never give up.”可知，此处是指除非继续前进，永不放弃，否则我们将一事无成，用unless引导条件状语从句。故选B。
10．（23-24八年级下·云南昆明·期末）Please don’t feed animals at the zoo, ________ the animal keeper allows you to do so.
A．if B．unless C．and D．but
【答案】B
【详解】句意：请不要在动物园喂动物，除非动物饲养员允许你这样做。
考查连词辨析。if如果；unless除非；and和；but但是。根据“Please don’t feed animals at the zoo, … the animal keeper allows you to do so”可知，除非动物饲养员允许你喂动物，否则不能这么做，故选B。
11．（23-24八年级下·云南普洱·期末）________ the movie YOLO (《热辣滚烫》) came out during the Spring Festival in 2024, many people rushed to the cinema to see how Jia Ling changed her life by losing weight.
A．Even though B．As soon as C．So that D．Ever since
【答案】B
【详解】句意：2024年春节期间，电影《热辣滚烫》一上映，许多人就冲到电影院看贾玲是如何通过减肥改变生活的。
考查连词辨析。Even though尽管；As soon as一……就……；So that为了；Ever since自从。根据“...the movie YOLO (《热辣滚烫》) came out during the Spring Festival in 2024, many people rushed to the cinema to see how Jia Ling changed her life by losing weight.”可知，这里指电影《热辣滚烫》一上映，许多人就冲到电影院看贾玲是如何通过减肥改变生活的，故选B。
12．（23-24八年级下·内蒙古呼伦贝尔·期末）At the Spring Festival Gala (联欢会), everyone shouts “Happy New Year”________ it is twelve o’clock.
A．if B．as soon as C．though D．although
【答案】B
【详解】句意：在春节联欢晚会上，一到十二点大家就喊“新年快乐”。
考查连词辨析。if如果；as soon as一……就……；though尽管；although尽管。根据“everyone shouts ‘Happy New Year’ …it is twelve o’clock”以及逻辑关系可知，应是一到十二点就喊“新年快乐”，这里应该为as soon as引导的时间状语从句。故选B。
13．（23-24八年级下·甘肃张掖·期末）—Call me ________you meet your sister at the train station.
—I will.
A．as soon as B．as well as C．as long as D．as better as
【答案】A
【详解】句意：——你在火车站一见到你妹妹就给我打电话。——我会的。
考查连词。as soon as 一……就；as well as和……一样；as long as只要；as better as不是正确的表达。根据语境可知，此处说的是一看到妹妹就要打电话，应用as soon as引导时间状语从句，故选A。
14．（23-24八年级下·安徽池州·期末）—They ran out of the room ________ they heard the alarm.
—Safety first! We should stay calm and act quickly!
A．as often as B．as well as C．as far as D．as soon as
【答案】D
【详解】句意：——他们一听到警报就跑出房间。——安全第一！我们应该保持冷静并迅速反应！
考查短语辨析。as often as每次，每当；as well as以及；as far as就……而言；as soon as一……就。根据“They ran out of the room”和“they heard the alarm”之间的关系，可知要用“一……就”的短语连接。故选D。
15．（23-24八年级下·云南昆明·期末）—Li Lin, is it OK for you to go to your grandpa’s house alone
—No problem. I ________ you as soon as I ________ there.
A．call; get B．call; will get C．will call; get D．will call; will get
【答案】C
【详解】句意：——李林，你一个人去你爷爷家行吗？——没问题。我一到那里就给你打电话。
考查动词时态。根据“is it OK for you to go to your grandpa’s house alone”以及“you as soon as”可知，主句应用一般将来时，as soon as引导的时间状语从句用一般现在时表示将来；主语“I”是第一人称单数形式，行为动词用原形即可。故选C。
16．（23-24八年级下·云南西双版纳·期末）YOLO (热辣滚烫) is ________ wonderful ________ many people like watching it.
A．enough;to B．such;that C．so; that D．too;to
【答案】C
【详解】句意：《热辣滚烫》如此精彩以至于很多人喜欢看。
考查结果状语从句。enough...to...“足够……去做……”，enough修饰形容词时要后置；such...that...“如此……以至于……”，such修饰名词；so...that...“如此……以至于……”，so修饰形容词或副词；too...to...“太……而不能……”，表示否定含义。此处表示如此精彩以至于很多人喜欢看，其中wonderful是形容词，故选 C。
17．（23-24八年级下·内蒙古呼伦贝尔·期末）—Some people talked and laughed ________ loudly in the cinema ________ we couldn’t hear the movie clearly at all.
—They are in bad manners.
A．too; to B．so; that C．such; that D．enough; to
【答案】B
【详解】句意：——有些人在电影院里大声说笑，以至于我们根本听不清楚电影。——他们不礼貌。
考查连词。too...to太……而不能，to后跟不定式；so...that太……以至于（so后接形容词或副词）；such...that如此……以至于（such后接名词）；enough...to，足够……去做，to后跟动词不定式。根据“Some people talked and laughed...loudly in the cinema...we couldn’t hear the movie clearly at all.”可知，有人在电影院里大声说笑，以至于看电影的人听不清电影在讲什么。loudly是副词，此处应用so...that。故选B。
18．（23-24八年级下·湖北·期末）—What do you think of the movie YOLO (热辣滚烫)
—It is ________ interesting ________ I like it very much.
A．such…that B．too…to C．so…that D．not…any more
【答案】C
【详解】句意：——你觉得电影《热辣滚烫》怎么样？——它是如此有趣以至于我非常喜欢。
考查结果状语从句。such…that如此……以至于，省略号上应是名词短语；too…to太……以至于不能；so…that如此……以至于，省略号上是副词或形容词；not…any more不再。根据第一空后是形容词排除A，句意是如此有趣以至于非常喜欢，第二空后是句子，用so ... that引导结果状语从句。故选C。
19．（23-24八年级下·内蒙古呼伦贝尔·期末）—Have you seen the movie Article 20 (第二十条) during the spring festival in 2024
—Yes. It is ________a wonderful film ________ I have seen it twice.
A．so; that B．such; that C．too; to D．enough; to
【答案】B
【详解】句意：——你看过2024年春节档的电影《第二十条》吗？——看过。这是一部如此精彩的电影，我已经看过两次了。
考查状语从句。so…that如此……以至于；such…that如此……以至于；too…to太……而不能；enough…to足够……去做……。根据“It is…a wonderful film…I have seen it twice.”可知，这是一部如此精彩的电影以至于我已经看过两次了，又结合“a wonderful film”可知，符合结构“such a/an+adj.+n.+that”引导的结果状语从句，故选B。
20．（23-24八年级下·甘肃庆阳·期末）On my way home there was ________ a heavy rain ________ I can’t move quickly yesterday afternoon.
A．so; that B．such; that C．enough; to D．too; to
【答案】B
【详解】句意：昨天下午，在我回家的路上雨下得太大了，我走不快。
考查结果状语从句。so...that...（so后接形容词或副词）如此……以至于……；such...that...（such后接名词）如此……以至于……；enough...to...足够……做某事；too...to...太……而不能……。根据“a heavy rain”和“I can’t move quickly”可知，雨下得太大了，所以走不快。“a heavy rain”是名词，此处应用such...that...。故选B。
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21世纪教育网(www.21cnjy.com)专题02 连词unless、as soon as 和so...that
一、基本用法
1. unless引导的状语从句
unless为连词，意为“除非；如果不”，引导条件状语从句，相当于if…not。若主句为一般将来时、祈使句或谓语中含有情态动词时， unless引导的条件状语从句用一般现在时表示将来。
Unless it rains tomorrow, we will go for a picnic.
=If it doesn't rain tomorrow, we will go for a picnic. 除非明天下雨，否则我们去野餐。
2. as soon as引导的状语从句
as soon as意为“一……就……”，引导时间状语从句，表示从句的动作一发生，主句的动作马上就发生。从句位于主句前、后均可；若主句用一般将来时，从句用一般现在时代替一般将来时。
I will do my homework as soon as I finish the meal. 我一吃完饭就会写作业。
3. so…that引导的状语从句
So…that意为“如此……以至于”，引导结果状语从句，其中so为副词，用来修饰其后的形容词或副词，说明其程度的大小。
He was so worried that he didn't sleep well last night. 他是如此焦虑以至于昨晚没睡好。
注意 such...that也可引导结果状语从句，但such修饰名词，其结构为：such（+冠词）+形容词+名词that从句。
That's such an easy question that even everyone can answer it. 那是一个如此简单的问题，以至于每个人都能回答它。
二、特殊用法
1. 当形容词为many/much/few/ little（少）时，要用so...that结构，即“so+many/much/few/ little+名词+that从句。”
He earns so little money that he can hardly feed his family. 他赚的钱很少，几乎不能养家糊口。
2. so...that...引导的结果状语从句可以和enough to do sth. 和too...to...结构转换。
（1）当that从句是肯定结构
①当that从句是肯定结构，that从句的主语与主句的主语相同时，可用“be+形容enough词+ to do sth. 结构把so... that复合句转化为简单句。
He was so clever that he could understand what I said.
=He was clever enough to understand what I said. 他很聪明，能理解我说的话。
②当that从句是肯定结构，且that从句的主语与主句的主语不相同时，可用...enough for sb. to do sth. 结构替换。
The question is so easy that I can work it out.
=The question is easy enough for me to workout. 这个问题很简单，我能算出来。
（2）当that从句是否定结构
①当that从句是否定结构，that从句的主语与主句的主语相同时，可与 too...to“be not+形容词+ enough to do sth.”结构互换。需要注意的是，“be not+形容词+enough to do sth.”中的形容词是so...that结构中形容词的反义词。
His brother is so young that he can't go to school.
=His brother is too young to go to school.
=His brother is not old enough to go to school.
他弟弟太小了，不能去上学。
②当that从句是否定结构，且that从句的主语与主句的主语不相同时，要用too.... for sb. to...结构替换。
The dress was so expensive that I could not buy it.
=The dress was too expensive for me to buy. 这条连衣裙太贵了，我不能买了。
3. so...that结构中的“so+形容词/副词”可以提至句首，以加强语气，但要注意用倒装语序。
So bright was the moon that flowers were bright as in the day. 在如此明亮的月光下，花儿像在白天一样鲜艳。
基础训练
一、单项选择
1．You can’t improve your spoken English _______ you practice it every day from now on.
A．as soon as B．unless C．if D．since
2．Living in a fast-developing world, we will fall behind ________ we keep learning.
A．if B．since C．after D．unless
3．You will not succeed ______ you work even harder.
A．though B．if C．since D．unless
4．—Winter swimming is exciting, but one can’t do it ________ he or she has got some training.
—That’s right. It can be really dangerous.
A．while B．unless C．as soon as D．since
5．You will not improve your skills ________ you practice the violin over and over again.
A．since B．unless
C．if D．until
6．Shanghai Legoland Discovery Centre has recently opened. It has a special rule that adults are not allowed to enter ________ they go with a child.
A．unless B．whenever C．though D．until
7．Please come on time unless you ________ ill.
A．will be B．are C．were D．be
8．________ you’ve tasted it, you can’t imagine how delicious the dishes are.
A．Because B．Although C．When D．Unless
9．We’ll visit Shanghai this Sunday ________ it rains or it’s very hot.
A．since B．if C．unless D．until
10．—You won’t reach the school on time ________ you take a taxi.
—However, I don’t take enough money.
A．because B．so C．unless D．while
11．I couldn’t wait to share it with my parents ______ I got the exciting news.
A．until B．as soon as C．because D．though
12．Please let me know ________ you get to the airport.
A．as soon as B．as good as C．as much as D．as far as
13．We are going to take a trip to Kunming ________ we save enough money.
A．so that B．as soon as C．ever since D．even if
14．—Lucy, could you help me do the dishes
—Sure. I’ll do it ________ I finish my homework.
A．unless B．because C．as soon as D．as long as
15．I’ll go to visit my aunt in England ________ the summer holiday starts.
A．while B．before C．until D．as soon as
16．Your cousin will come to see you as soon as he ________ here tomorrow.
A．is arriving B．will arrive C．arrives D．arrived
17．—What do you think of the film
—It is ________ exciting ________ I’d like to see it again.
A．too; to B．such; that C．as; as D．so; that
18．The box is ___________ heavy that old Jack can’t carry it. Let’s go and help him.
A．very B．too C．so D．much
19．There are ________ many people in the store that Peter doesn’t like to shop there.
A．very B．quite
C．such D．so
20．—I am going to take this summer holiday in Taiwan.
—Oh, really Taiwan is ________ a beautiful place that ________ people in Guangdong go to visit it every year.
A．such; thousand B．so; thousands of C．such; thousands of D．such; thousand of
二、句型转换
1．They couldn’t stop to have a rest if they didn’t finish the work.（改为同义句）
They couldn’t stop to have a rest they the work.
2．Sun Wukong can turn himself into a person if he can hide his tail.（改为同义句）
Sun Wukong turn himself into a person he can hide his tail.
3．He is too young to go to school. (改为同义句)
He is young he can’t go to school.
4．The girl got such a beautiful dress that she wore it all day. (改为同义句)
The girl got beautiful a dress she wore it all day.
5．Now the panda is old enough to protect itself.
Now the panda is old it protect itself.
提升训练
1．（23-24八年级下·上海浦东新·期末）The milk _________ bad unless you put it in the fridge.
A．doesn’t go B．go C．won’t go D．will go
2．（23-24八年级下·河北唐山·期末）They will lose the game ________ they try their best.
A．since B．unless C．until D．before
3．（23-24八年级下·云南昆明·期末）I will not give up __________ I achieve my dream.
A．if B．unless C．but D．because
4．（23-24八年级下·河北张家口·期末）—Shall we go for a picnic in the forest park tomorrow
—Yes, ________ it rains heavily.
A．unless B．if C．as soon as D．until
5．（23-24八年级下·甘肃张掖·期末）I won’t give my camera to you ________ you promise to bring it back by Saturday.
A．if B．unless C．because D．since
6．（23-24八年级下·西藏拉萨·期末）—May I go to the concert with you
— I’m afraid not _________ you have a ticket, because I have only one.
A．since B．as soon as C．unless D．even though
7．（23-24八年级下·山东滨州·期末）You can’t get success __________ you keep working hard from now on
A．if B．unless C．though D．because
8．（23-24八年级下·山东青岛·期末）You can never know what’s possible ______ you try to make it happen.
A．as soon as B．but C．unless D．what
9．（23-24八年级下·云南曲靖·期末）No pain, no gain. We can achieve nothing ________ we keep going and never give up.
A．if B．unless C．so that D．as soon as
10．（23-24八年级下·云南昆明·期末）Please don’t feed animals at the zoo, ________ the animal keeper allows you to do so.
A．if B．unless C．and D．but
11．（23-24八年级下·云南普洱·期末）________ the movie YOLO (《热辣滚烫》) came out during the Spring Festival in 2024, many people rushed to the cinema to see how Jia Ling changed her life by losing weight.
A．Even though B．As soon as C．So that D．Ever since
12．（23-24八年级下·内蒙古呼伦贝尔·期末）At the Spring Festival Gala (联欢会), everyone shouts “Happy New Year”________ it is twelve o’clock.
A．if B．as soon as C．though D．although
13．（23-24八年级下·甘肃张掖·期末）—Call me ________you meet your sister at the train station.
—I will.
A．as soon as B．as well as C．as long as D．as better as
14．（23-24八年级下·安徽池州·期末）—They ran out of the room ________ they heard the alarm.
—Safety first! We should stay calm and act quickly!
A．as often as B．as well as C．as far as D．as soon as
15．（23-24八年级下·云南昆明·期末）—Li Lin, is it OK for you to go to your grandpa’s house alone
—No problem. I ________ you as soon as I ________ there.
A．call; get B．call; will get C．will call; get D．will call; will get
16．（23-24八年级下·云南西双版纳·期末）YOLO (热辣滚烫) is ________ wonderful ________ many people like watching it.
A．enough;to B．such;that C．so; that D．too;to
17．（23-24八年级下·内蒙古呼伦贝尔·期末）—Some people talked and laughed ________ loudly in the cinema ________ we couldn’t hear the movie clearly at all.
—They are in bad manners.
A．too; to B．so; that C．such; that D．enough; to
18．（23-24八年级下·湖北·期末）—What do you think of the movie YOLO (热辣滚烫)
—It is ________ interesting ________ I like it very much.
A．such…that B．too…to C．so…that D．not…any more
19．（23-24八年级下·内蒙古呼伦贝尔·期末）—Have you seen the movie Article 20 (第二十条) during the spring festival in 2024
—Yes. It is ________a wonderful film ________ I have seen it twice.
A．so; that B．such; that C．too; to D．enough; to
20．（23-24八年级下·甘肃庆阳·期末）On my way home there was ________ a heavy rain ________ I can’t move quickly yesterday afternoon.
A．so; that B．such; that C．enough; to D．too; to
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