第3讲条理分明的状语从句在复合句中作状语的句子称为状语从句。
状语从句由从属连词引导，可以放在句首或句末，放在句首时，从句后边一般用逗号与主句隔开；放在句末时，从句前通常不用逗号。
一、常见状语从句的类型及连接词(1)I remember you showed me some photos on that theme the last time you visited our school.我记得上次你参观我们学校时给我展示了关于那个主题的一些照片。
(2016·全国Ⅱ)(2)John thinks it won’t be long before he is ready for his new job.约翰认为不久他就能为他的新工作做好准备。
(3)We did so well that we were invited to share our idea and experience with all the students of our school.我们做得如此好，所以被邀请去和全校学生交流想法和经验。
(2016·北京)(4)The social media companies should either monitor their websites better so that children do not sign up too early，or they should adjust their websites to the needs of younger users.社交媒体公司要么更好地监控他们的网站，这样孩子们就不会过早地注册，要么调整自己的网站以适应年轻用户的需求。
(2018·江苏)即时训练1用状语从句完成句子二、状语从句的常见句型状语从句是英语写作中常用的从句之一，所以必须学会熟练运用下列常用句型。
1.as soon as/the moment/the instant/immediately/directly/instantly一……就……As soon as he heard the news，he jumped with joy.他一听到这个消息，就高兴地跳了起来。
2.each/every time每次/每当……Every time I see the old photo，I always think of my school days.每当我看到这张老照片，我总是想起我的学生时代。
3.the first time第一次……I thought the cake tasty the first time I ate it.我第一次尝那种蛋糕就觉得很可口。
4.before在……之前，还没来得及……就……My classmate had rushed out before I could say a word.我还没来得及说话，我的同学就冲了出去。
5.ever since自从……Ever since my friend entered high school，his mother has been worrying about his studies.自从我的朋友进入高中，他妈妈就一直担心他的学习。
6.as/so long as只要In the afternoon，I asked Uncle Paul if I could take a horse ride，and he said yes，as long as my dad went with me.到了下午，我问保罗叔叔我能否骑马，他说只要爸爸陪着就可以。
(2018·浙江) 7.providing/provided/suppose/supposing (that)...如果/假如……Suppose she doesn’t want to go with us，what should we do？假如她不想和我们一起去，我们该怎么办？8.on condition that...在……条件下；如果……I can lend you my computer on condition that you take good care of it.只要你好好保管，我可以把电脑借给你用。
9.now that/since因为；既然Now that everyone is here，let’s begin our class meeting.既然大家都到了，我们开班会吧。
10.considering that...鉴于；考虑到……He has made remarkable progress，considering that he only started last week.考虑到他是上周才开始的，他已经取得了相当大的进步。
11.even if/even though即使；尽管Some social apps were popular among the children even though they supposedly require users to be at least 13.尽管，据说一些社交软件要求用户至少13周岁，但它们却在孩子们中间风靡一时。
(2018·江苏) 12.though/although/while虽然；尽管While much of the debate so far has been focused on the safety of driverless cars，policymakers also should be talking about how self-driving vehicles can help reduce traffic jams，and cut emissions.虽然目前对于无人驾驶汽车讨论的焦点在它的安全性能上，但政策制定者们也应该讨论无人驾驶汽车如何帮助缓解交通阻塞及削减排放。
(2018·北京)13.疑问词＋-ever/no matter＋疑问词...无论……However/No matter how far away we are，we both miss each other.无论我们距离有多远，我们都想念着彼此。
14.whether...or (not)...是……还是……；不管，无论……Whether you’re looking at wallpaper or paint，the time，effort and relative expense put into it are significant.无论你在看墙纸还是油漆，你投入其中的时间、精力以及相关费用都是很重要的。
(2018·全国Ⅰ) 15.比较级＋than...比……更……The new rule worked out better than we had planned.新制度比我们预先计划的效果好。
16.so that以便，目的是；因此I arrived there very early that morning so that I could catch the early bus.那天早上我很早到达那里，为的是赶上早班车。
17.in order that 为了……In order that she can receive university education ，her parents work hard.为了使她能接受大学教育， 她的父母辛苦地工作。
18.so/such...that...如此……以至于……The dough figurine he made was so beautiful that we couldn ’t wait to have a try ourselves. 他做的面人如此漂亮， 以至于我们迫不及待地想亲自试一试。
(2015·北京) 即时训练2 用状语从句完成句子三、在写作中使用状语从句时的常见错误1.because 和so ，although/though 和but 使用不当(详见“并列句讲解”)2.介词短语和连词误用⎩⎪⎨⎪⎧ (误)You ’d better take a book with you in case of you have to wait.(正)You ’d better take a book with you in case you have to wait. ⎩⎪⎨⎪⎧(误)I failed in the exam because of I hadn ’t made good preparations for it.(正)I failed in the exam because I hadn ’t made good preparations for it. 3.the first time 和for the first time 用法不当⎩⎪⎨⎪⎧ (误)I thought my English teacher very kind the first time when I saw her.(误)I thought my English teacher very kind for the first time I saw her.(正)I thought my English teacher very kind the first time I saw her.4.有些状语从句的时态错误⎩⎪⎨⎪⎧(误)She will pay a visit to the farm if it won ’t rain next weekend.(正)She will pay a visit to the farm if it doesn ’t rain next weekend.5.where 引导定语从句和状语从句用法混淆⎩⎪⎨⎪⎧ (误)While reading the book ，please don ’t make a mark in the place there is a mistake.(误)While reading the book ，please don ’t make a mark there is a mistake.(正)While reading the book ，please don ’t make a mark in the place where there is a mistake.(正)While reading the book ，please don ’t make a mark where there is a mistake.综合演练Ⅰ.用状语从句完成句子1.顺着道走，以免迷路。