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2026-2027学年鲁教版（五四学制）八年级英语上册核心语法精讲精练
（新教材）Unit 3 Growing Up
核心语法：so that 引导的目的状语从句
一、核心概念
目的状语从句表示主句动作发生的目的，即“为什么要做这件事”。so that 是最常用的目的状语从句引导词，意为“以便”、“为了”。
核心功能： 用一个句子来说明动作发生的“目的”。
核心结构： 主句 + so that + 从句（目的）
核心特征： 从句中常含有情态动词 can / could / may / might / will / would。
示例：
I got up early so that I could catch the first bus.（我早起以便能赶上第一班公交车。）
She spoke loudly so that everyone could hear her.（她大声说话以便大家都能听见。）
二、so that 的基本结构
1. 基本结构
结构： 主句 + so that + 主语 + 情态动词 + 动词原形 + 其他
I study hard so that I can pass the exam.（我努力学习以便能通过考试。）
He bought a map so that he could find the way.（他买了一张地图以便能找到路。）
She spoke slowly so that everyone could understand her.（她说得很慢以便大家能听懂。）
2. 位置灵活
目的在后（最常见）： 主句 + so that + 从句
目的在前（强调）： So that + 从句, + 主句（较少用）
3. 从句中常用的情态动词
情态动词 用法 例句
can / could 能够 I got up early so that I could catch the bus.
may / might 可以，可能 She studies hard so that she may get good grades.
will / would 将，会 I’ll call you so that you will know the news.
三、so that 的时态呼应
主句时态 从句情态动词 示例
现在时 can / may / will I study hard so that I can pass.
过去时 could / might / would I studied hard so that I could pass.
将来时 can / will I will study hard so that I can pass.
记忆规则： 主句现在是can，主句过去是could。
四、so that 与 in order that 的对比
so that 和 in order that 都表示目的，但 in order that 更正式，常用于书面语。
引导词 语气 位置 示例
so that 常用 句末 I got up early so that I could catch the bus.
in order that 更正式 句首或句末 In order that he might catch the train, he left early.
例句：
She studied hard so that she could pass the exam.（她努力学习以便通过考试。）
She studied hard in order that she might pass the exam.（更正式）
五、so that 与不定式表目的（to do）的转换
so that 目的状语从句可以简化为不定式短语，使句子更简洁。
目的状语从句 不定式简化
I got up early so that I could catch the bus. I got up early to catch the bus.
She went to the library so that she could borrow some books. She went to the library to borrow some books.
He studied hard so that he might pass the exam. He studied hard to pass the exam.
转换规则：
当主句和从句的主语一致时，可以简化为不定式。
如果主语不一致，不能简化，必须用完整的从句。
六、so that 目的状语 vs so...that 结果状语（易混！）
so that 可以引导目的状语，而 so...that 引导结果状语。两者结构不同，注意区分！
引导词 含义 结构 从句特点
so that 以便（目的） so that + 句子 有情态动词（can/could）
so...that 如此……以至于……（结果） so + 形/副 + that 无情态动词（客观结果）
对比例句：
目的： I got up early so that I could catch the bus.（早起是为了赶上公交车）
结果： I got up so late that I missed the bus.（起得太晚以至于错过了公交车）
七、易错点与难点突破
1. so that 目的状语从句中忘记情态动词
I got up early so that I catch the bus.
I got up early so that I could catch the bus.
2. so that 与 so...that 的混淆
He worked hard so that he failed.（逻辑错误，应用 so...that）
He worked hard, so that he succeeded.（目的）
He worked so hard that he succeeded.（结果）
3. 时态呼应错误
I studied hard so that I can pass the exam.（主句过去时，从句应用 could）
I studied hard so that I could pass the exam.
4. 主语不一致时错误简化
I bought a book so that my sister could read it.
→ I bought a book to read it.（ 主语不一致，不能简化！）
I bought a book so that my sister could read it.（保留完整从句）
八、思维导图总结
九、记忆口诀
so that 目的状语从句口诀：
so that 表目的，以便、为了记心间；
从句常有情态动词，can/could/may/might。
主句现在是 can，主句过去是 could；
主语一致可简化，to do 替换 so that。
1．He wrote books____they could learn about how he treated the sick.
A．because B．as soon as C．until D．so that
2． The movie Nezha is ____educational ____ I want to see it again.
A．so; that B．such; that C．too; to D．as; to
3． The cake is ____ delicious ____ I enjoy it very much.
A．too; to B．so; to C．so; that D．such; that
4． Xu Dawei wants to pass the Civilian Mobile Library on to his son ____ it can stay open forever.
A．before B．although C．so that
5． We help our mother with housework ____ she can have a rest during the holiday.
A．so that B．after C．until D．that
6．The performers practiced for months, ________ they could perform perfectly.
A．so that B．because C．although
7． They organized a lot of activities for me in my spare time ____I wouldn't miss home or feellonely.
A．because B．although C．so that D．as soon as
8． —More and more people in Beijing are learning English ____ they can better serve the 2008 Olympic Games.
—I'm sure they will.
A．because of B．so that C．even though D．as if
9．The teacher spoke very loudly _______ all the students in the classroom could hear him.
A．because B．if C．so that D．now that
10． It's important for us to protect the environment ____ we can live in harmony with nature.
A．so that B．even if C．as if D．as long as
11．Everybody studies really hard ________ they can get good grades in the exams.
A．because B．but C．so that
12． She studies hard ____ she can get good grades.
A．although B．so that C．until
13．Our teacher asks us to read English newspapers every day ____ we can improve our English.
A．now that B．so that C．as long as D．even though
14．—Why don't your grandparents live with you
—They prefer living in the village ________ they can get closer to nature.
A．so that B．as soon as C．even though
15．People usually read the articles in newspapers very carefully ________ they can know what is going on around the world.
A．so that B．even if C．because of D．in order to
16．一Mom, I took my partner's math book home by mistake. What should I do
一Well, you should call her you can say sorry to her.
A．as if B．so that C．even though D．ever since
17．We should take care of the earth ____ we can make it a better planet to live on.
A．so that B．until C．as soon as D．while
18．—I have few friends in my new school. What should I do
—Be more active in class ________ you can make more friends.
A．or B．so that C．unless D．although
19．He put on the glasses ________ he could see the blackboard clearly.
A．because B．before C．after D．so that
20．Most of us like watching news _________ we can learn what happens in the world.
A．after all B．so that C．even if D．now that
21． She saved money____she could buy anew laptop.
A．when B．so that C．if D．because
22．—I heard Hefei Central Library has been open to the public recently.
—Yes, it has plenty of desks and chairs ________ it's quite convenient for reading.
A．as if B．so that C．as long as D．as soon as
23． Rose practiced her speech many times ____ she could say every word correctly.
A．because B．so that C．as soon as D．if
24．I'll leave you my phone number ________ we can keep in touch with each other.
A．after B．so that C．until D．although
25．Mr Jones prefers to stay at the hospital ____ he can care for his mother.
A．before B．as soon as C．even if D．so that
26．You should go now ________ you won't be late.
A．so that B．so C．if D．when
27．You'd better speak aloud ____ we can hear you.
A．so that B．as … as C．as if D．since
28．—Shall I hand in the form this afternoon
—Yes, please hand it in as soon as possible ________ I can send it to our teacher on time.
A．because B．although C．but D．so that
29．Miss Li gives us her phone number ________ we can keep in touch with her.
A．if B．so that C．or D．but
30．Please let me tell you again ________ you won't forget.
A．as long as B．if C．so that D．because
31． Parents often encourage their children ____ children can make great progress.
A．as soon as B．so that C．if D．unless
32． You should talk to your parents ____ they can understand you well.
A．untill B．although C．so that D．unless
33．Take this dictionary with you ________ you may use it in class.
A．so that B．in order to C．although D．when
34．Bethune invented new tools ________ he could help the wounded soldiers.
A．if B．so that C．after D．but
35．To encourage people to come to the city, Zibo set up a special "barbecue (烧烤) map" and added 21 new barbecue bus lines ________ people can "get on the bus to rest, get off to eat".
A．even though B．so that C．since
36．Lucy listened to her teacher carefully _______ she wouldn't miss any important points.
A．in order to B．so that C．ever since
37． Now more and more people take exercise every day____ they can have healthier bodies.
A．such that B．in order to C．so that D．even though
38．—Mom, I took my partner's math book home by mistake. What should I do
—Well, you should call her ________ you can say sorry to her.
A．as if B．so that C．even though
39．—What a mess! The sharing bikes are thrown everywhere!
—Let's collect and put them in the right place _________ they can be used conveniently!
A．so that B．such that C．too to D．very that
40．He turned up the radio _______ everyone could hear the good news.
A．so that B．as long as C．though D．in order to
41． We save money ____ we can buy some school things for the children in the countryside.
A．so that B．but C．and
42． He raised his voice ____ everyone could hear him.
A．the minute B．although C．so that D．until
43．—Mom, I took my partner's math book home by mistake. What should I do
—Well, you should call her ________ you can say sorry to her.
A．as if B．so that C．even if D．ever since
44．Rebecca has to get up early tomorrow _______ she can catch the first bus.
A．so to B．so as C．so that D．so too
45．—What would some students like to do after finishing their education
—They would like to start working ____they needn't depend on their parents completely.
A．as soon as B．so that C．even though
46． I have to leave now ____I can catch the early bus.
A．so that B．because of C．until D．as soon as
47．Mrs. Li always speaks at the top of her voice________ the students at the back can hear her.
A．so that B．ever since C．as soon as D．as long as
48．—Look! The shared bikes are everywhere.
—Let's put them in a right place __________ they can be used again.
A．so that B．even though C．as soon as
49． As students, we should make full use of every bit of time ____ we can find more time to deal with the subject we are not good at.
A．as soon as B．so that C．although D．unless
50． Why not say sorry to her____ you can be friends again
A．unless B．until C．so that
参考答案及试题解析
1．D
【解析】句意：他写书，以便他们可以了解他是如何对待病人的。A：because因为；B：as soon as一……就……；C：until直到……；D：so that因此，以便。根据前后句的意思，可知写书的目的是让他们可以了解他是如何对待病人，用so that引导的目的状语从句，故选D。
【点评】考查连词辨析。掌握连词的词义和用法，根据前后句的关系，选出正确的连词。
2．A
【解析】句意：《哪吒》 这部电影是如此的有教育意义以至于我想再看一遍。A：so; that，如此……以至于……，so后修饰形容词或副词，句型是"so+形容词或副词+that从句"。B：such; that，如此……以至于……，such后修饰名词， 句型是"such+(a/an)+形容词+名词+that从句"。C：too; to，太……以至于不能……，too后跟形容词或副词，to后面跟动词原形。D：as; to，表述错误。根据 I want to see it again可知，这是一个句子，所以前面要用that，排除选项C和选项D。且educational为形容词，所以前面用so，故选A。
【点评】考查结果状语从句。注意短语的区别，结合空处的前后，选择合适的句式。
3．C
【解析】句意：蛋糕很好吃，我很喜欢。too…to，太……而不能……，根据后面的I enjoy it very much(我非常享受它)是一个句子，所以显然第二个空不能用不定式to去连接句子, 所以A和B排除。C、D都是如此....以至于....的意思，但二者的区别在于so后面跟形容词，而such后面跟名词，根据第一个空后面的delicious是形容词，所以只能用so连接，故选C。
【点评】考查结果状语从句。注意这几个搭配的不同用法。
4．C
【解析】句意：徐大伟想把民间流动图书馆传给儿子，为了让它永远开放下去。before在……之前；although虽然，尽管；so that，以便；为了。根据Xu Dawei wants to pass the Civilian Mobile Library on to his son （徐大伟想把民间流动图书馆传给儿子）和 it can stay open forever.（让它永远开放下去。）可知这是表示目的，so that，符合题意，故答案为C。
【点评】考查目的状语从句。理解句意并掌握固定搭配so that的意义和用法。
5．A
【解析】句意：我们帮助妈妈做家务，这样她就可以在假期里休息一下。so that以便，为了，表示目的；after在……之后，表示时间；until直到，表示时间；that引导名词性从句或结果状语从句。更好 We help our mother with housework（ 我们帮助妈妈做家务 ）是she can have a rest during the holiday. （ 她可以在假期里休息一下。 ）的目的，因此用so that表示目的，故选A。
【点评】考查so that引导的目的状语从句。理解句意并掌握so that的意义和用法。
6．A
7．C
【解析】句意：他们在业余时间为我组织了很多活动，这样我就不会想念家或感到孤独。because 因为；although 虽然，即使；so that 因此，这样；as soon as 一……就……。根据语境分析可知，后句是前句的目的，故选C。
【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。
8．B
【解析】句意：——北京越来越多的人正在学习英语以便于更好地服务于2008年奥运会。 ——我相信他们会的。A.由于，后接名词或者名词短语。B.以便于，后接目的状语从句。C.即使，引导让步状语从句。D.好像，引导方式状语从句。分析原句可知有两个主语和谓语动词，可知此处是连词引导从句。根据原句 More and more people in Beijing are learning English ，是为了更好地服务于2008年奥运会。可知此处是目的状语从句。故选B。
【点评】考查目的状语从句。分析句意及结合选项意思，可判断正确的连词。
9．C
10．A
【解析】句意：对我们来说保护环境很重要，以便我们能与自然和谐相处。so that以便，为了；even if即使；as if好像；as long as只要。结合语句"It's important for us to protect the environment … we can live in harmony with nature."可知，后半句是前半句的目的，so that引导目的状语从句，符合语境，故选A。
【点评】考查连词辨析。解题需牢记各连词的含义及用法，根据句子逻辑关系选择合适的连词。
11．C
【解析】句意：每个人都努力学习，以便在考试中取得好成绩。because因为；but但是；so that以便。根据"they can get good grades in the exams."可知，此处表目的，应为so that引导的目的状语从句。故选C。
【点评】考查连词辨析。 解题关键是理清前后句的关系：先明确 "because"（原因）、"but"（转折）、"so that"（目的）的核心用法，再结合 "努力学习" 与 "取得好成绩" 的 "手段 - 目的" 逻辑，排除不符合关系的连词。
12．B
【解析】句意：她努力学习以便能取得好成绩。although虽然，尽管；so that以便，为了；until直到。结合语句"She studies hard … she can get good grades."可知，前半句是动作，后半句是目的，so that引导目的状语从句，符合语境，故选B。
【点评】考查连词辨析。解题需根据句子的目的逻辑关系判断合适的连词。
13．B
【解析】句意：我们的老师要求我们每天阅读英文报纸，以便提高我们的英语水平。A.由于，既然，引导原因状语从句。B.以便于，引导目的状语从句。C.只要，引导条件状语从句。D.即使，引导让步状语从句。根据原句asks us to read English newspapers every day的目的是we can improve our English，可知此处是目的状语从句连词。故选B。
【点评】考查目的状语从句。理清选项连词意思，引导什么从句，结合原句句意选出正确的连词。
14．A
15．A
16．B
17．A
【解析】句意：我们应该爱护地球以便我们能使它成为一个更适合居住的星球。so that 以便，为了；until 直到；as soon as 一……就……；while 当……时候。根据上下文逻辑可知，我们爱护地球的目的是为了使地球成为一个更适合居住的星球，所以用so that 引导目的状语从句。故选A。
【点评】考查连词。注意首先读懂句意，然后根据上下文的逻辑选出正确答案。
18．B
19．D
20．B
【解析】句意：我们大多数人都喜欢看新闻，以便我们能够了解世界上发生了什么。after all毕竟；so that以便（表目的）；even if尽管；now that既然。空前喜欢看新闻的目的是为了了解世界上发生了什么事情，空后表示目的，因此需填so that表目的。故选B。
【点评】考查连词。掌握相关的连词，结合语境，选择正确答案。
21．B
【解析】句意："她攒钱____她能买一台新笔记本电脑"，从语义上看，"攒钱" 的目的是 "买新电脑"，so that 引导目的状语从句，意为 "为了、以便"，符合语境；when 表时间、if 表条件、because 表原因，均不符合目的逻辑，故答案为 B。
【点评】考查目的状语从句连词的语境运用，注意结合句意判断目的逻辑，掌握 so that 引导目的状语从句的句式特征，从句常搭配情态动词。
22．B
23．B
【解析】句意：罗丝练习了很多遍演讲，以便她能把每个单词都说准确。because因为，引导原因状语从句；so that以便、为了，引导目的状语从句；as soon as一……就，引导时间状语从句；if如果，引导条件状语从句。结合语句"Rose practiced her speech many times … she could say every word correctly."可知，反复练习演讲的目的是准确说出每个单词，so that用来引出动作的目的，故选B。
【点评】考查目的状语从句。解题需区分不同连词引导的从句类型，根据句子前后的目的逻辑选择对应连词。
24．B
【解析】句意：我会把我的电话号码留给你，以便我们能保持联系。after在……之后；so that以便；until直到……才；although尽管。根据"I'll leave you my phone number...we can keep in touch with each other."可知，此处表示目的，留电话号码以便我们能保持联系。故选B。
【点评】考查连词辨析。注意：明确连词分类（并列/从属/关联）；分析句意逻辑（并列、转折、因果等）；检查语法结构（从句语序、主谓一致等）；记忆固定搭配（如 as soon as, so...that...）；通过验证排除干扰项（逻辑矛盾、语法错误等）。
25．D
【解析】句意：琼斯先生更喜欢待在医院里，这样他就能照顾他的母亲。A.before在……之前；B.as soon as一……就；C.even if即使；D.so that以便，为了。根据语境"he can care for his mother"可知，待在医院的目的是照顾母亲，so that引导目的状语从句，符合语境。故选D。
【点评】考查目的状语从句。注意识记每个短语的含义，结合语境选出正确的连词。
26．A
27．A
【解析】句意：你最好大声讲，以便我们能听清你说的话。A：so that"以便、为了"，引导目的状语从句，从句中常含有can、could、may、might等情态动词；B：as … as"和……一样"，第一个as修饰形容词副词原级，第二个as引导比较状语从句，表示前后比较对象在某一方面程度相同；C：as if
"好像，似乎"，引到方式状语从句；D：since"自从"引导时间状语从句，主句用现在完成时/现在完成进行时，而且谓语动词为延续性动词，从句用一般过去时而且谓语动词多为非延续性动词；"既然"引导原因状语从句，一般放在主句前面，表众所周知的原因。"大声讲"是为了"听得清"，因此是目的状语从句，故选A。
【点评】考查状语从句，区分so that；as … as；as if和since的含义额应用，本题涉及so that引导的目的状语。
28．D
【解析】句意：——我今天下午就要上交这个表格吗？——是的，请尽快上交，以便于我可以按时把它交给老师。because因为；although虽然；but但是；so that以便于。根据前后两句的逻辑，可知此处表示目的，应该用so that引导目的状语从句，故选D。
【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答案。
29．B
【解析】句意：李老师给了我们她的电话号码，以便我们能和她保持联系。if如果，引导条件状语从句；so that以便、为了，引导目的状语从句；or或者、否则，表选择或转折；but但是，表转折。结合语句"Miss Li gives us her phone number … we can keep in touch with her."可知，后半句是前半句动作的目的，即给电话号码是为了保持联系，so that符合语境和语法要求，故答案为B。
【点评】考查连词的用法辨析。解题需牢记：so that 常用来引导目的状语从句，表达"为了、以便"的含义，用来连接动作和对应的目的。
30．C
31．B
【解析】句意：父母经常鼓励他们的孩子，这样孩子才能取得很大的进步。根据题干children can make great progress可知，这里表示的是目的，家长鼓励孩子是为了孩子能取得进步。A.as soon as一......就......，B.so that以便，C.if如果，D.unless除非。so that引导目的状语从句。故选B。
【点评】考查连词。注意辨析连词，抓住关键词并结合句意选出最合适的一项。
32．C
【解析】句意：你应该和你的父母谈谈，这样他们才能更好地理解你。A.知道，引导时间状语从句。B.尽管，引导让步状语从句。C.以便，引导目的状语从句。D.除非，引导条件状语从句。分析句意You should talk to your parents 你应该和你的父母谈谈的结果是they can understand you well.他们才能更好地理解你。可推知此处连词是so that，引导目的状语从句。故选C。
【点评】考查目的状语从句。分析句意可判断正确的连词。
33．A
34．B
35．B
36．B
【解析】句意：Lucy上课的时候认真听老师讲课，这样她就不会遗漏重要知识点了。考查连词。in order to为了，后面跟不定式结构，表示目的；ever since自从；so that以便，为了，后面跟句子。根据"Lucy listened to her teacher carefully in class ... she wouldn't miss any important points."可知，Lucy上课认真听老师讲课的目的是，她不会遗漏重要知识点，空格后是目的，而且是句子，因此用so that表示目的。故选B。
【点评】考查目的状语从句的引导词及短语辨析，注意区分 in order to（接动词原形）和 so that（接从句）表目的时的不同用法，结合句子结构（后接从句）选择合适短语，掌握各短语在语义和语法上的差异。
37．C
【解析】句意：现在越来越多的人锻炼以便他们能有更健康的身体。A.such that，如此……以至于，一般用"such+名词+that从句"形式，强调结果，而非目的；B.in order to，为了，后接动词原形，不接从句；C.so that，为了、以便，引导目的状语从句；D.even though，尽管，引导让步状语从句；根据句意可知此句是结果状语从句，排除选项ABD，故选C。
【点评】考查so that引导结果状语从句。识记such……that、in order to、so that、even though的用法。
38．B
【解析】句意：——妈妈，我错把我搭档的数学书带回家了。我该怎么办？——嗯，你应该打电话给她，这样你就可以向她道歉了。as if好像……似的；so that为了，以便；even though即使。根据"I took my partner's math book home by mistake."和"Well, you should call her...you can say sorry to her."可知，"我"错拿搭档的书了，所以"我"打电话给她是为了道歉，此处应用so that引导目的状语从句。故选B。
【点评】考查连词辨析。注意根据前后句句意选择正确的连接词。
39．A
【解析】句意：——真是一团糟！共享单车被扔得到处都是！——让我们把它们收集起来并放在合适的地方，这样它们就能被方便地使用了！so that以便，为了；such that到这样的程度；too to，通常too与to并不是直接连接；very that无此搭配。根据"Let's collect and put them in the right place...they can be used conveniently!"可知，把共享单车收集起来并放在该放的地方，就是为了方便人们使用，空处应是so that，引导目的状语从句。故选A。
【点评】考查短语辨析，首先理解短语区别，然后根据前后句句意确定短语。
40．A
41．A
【解析】句意：我们攒了一些钱，这样我们就能够为乡下的孩子们买一些学习用品。A为了，B但是，C并且，save money的目的是ibuy school things，故用so that引导目的状语从句，故选A。
【点评】考查连词，注意识记so that的用法。
42．C
【解析】句意：他提高了嗓门以便每个人都可以听到他。A 一……就……； B 虽然； C 以便； D 直到。根据语句He raised his voice…everyone could hear him.可知，他提高嗓门的目的是为了让大家听到，所以应该用so that引导目的状语从句，故选C。
【点评】考查连词辨析。注意so that的基本含义及用法。
43．B
44．C
【解析】句意：丽贝卡明天必须早起以便赶上第一班公交车。分析句子结构，可知空格线前后是两个句子句意完整，不缺成分，可推知此处是连词连接从句。结合句意"早起""赶早班车"。可知此处是目的状语从句。需要连词so that。故选C。
【点评】考查目的状语从句。分析句子结构及理清句意判断是复合句。找出连词。
45．B
【解析】句意:——一些学生完成学业后想做什么 ——他们想开始工作，这样他们就不必依赖父母了。A.as soon as一......就；B.so that为了；C.even though即使。根据空格前后的语境，"They would like to start working...they needn't depend on their parents completely."可知，开始工作是为了不必依赖父母，用so that引导目的状语从句。故选B。
【点评】考查目的状语从句。注意根据句子逻辑关系确定连词。
46．A
【解析】句意：我现在得走了，这样我才能赶上早班车。so that以便，结果；because of因为，介词短语，后接名词或代词及动名词；until直到；as soon as一……就……。根据前后句的句意，可知后句是前句的目的，用so that引导的目的状语从句，故选A。
【点评】考查连词辨析。理解连词的词义和用法。根据前后句的句意，确定前后句的关系，选出正确的连词。
47．A
48．A
【解析】句意：——看！共享单车到处都是。——让我们把它们放在正确的地方，以便它们可以再次使用。so that目的是；even though即使；as soon as一……就。分析句子可知，Let's put them in a right place的目的是they can be used again，用so that引导目的状语从句。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．B
【解析】句意：作为学生，我们应该充分利用每一点时间，以便找到更多的时间来应对我们不擅长的科目。as soon as一……就……；so that以便于，以致于；although尽管，即使；unless除非。根据"we can find more time to deal with the subject we are not good at"可知，我们充分利用时间的目的是为了有更多时间应对薄弱科目，用so that引导目的状语从句。故选B。
【点评】考查从属连词辨析。注意首先分析句子内部语义上的逻辑关系，结合选项所给连词的具体用法选择正确的连词。
50．C
【解析】句意：为什么不跟她说声对不起，这样你就可以再一次和她做朋友了？unless除非，引导条件状语从句；until直到，可引导时间状语从句；so that以便，引导目的状语从句。根据"Why not say sorry to her ...you can be friends again "可知，空处表目的，故选C。
【点评】考查连词辨析。注意掌握so that引导目的状语从句。
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