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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
2．Living in a fast-developing world, we will fall behind ________ we keep learning.
A．if B．since C．after D．unless3．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 more19．（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
