做这类题前，需要先解析句型，判断是什么从句。
初级
- He is a shy man, ___he is not afraid of anything or anyone.
A. so B. but C. or D. as
选 B. 转折状语从句
根据句意反推是转折状语从句，“尽管他很害羞，但是他不害怕任何人和任何事。”
2.Cathy had quit her job when her son was born ___ she could stay home and raise her family.
A.now that B. as if C. only if D. so that
选 D. 目的状语从句，目的状语从句经常跟情态动词一起连用
主句：Cathy had quit her job when her son was born
从句： she could stay home and raise her family.
主句成分完整， when her son was born 作为时间状语从句修饰 quit。
根据句意“她在她儿子出生的时候就辞职了，以致于她可以呆在家里养她的家庭”，推到出是目的状语从句。做了什么，目的是什么。
3.I don’t really like the author,___ I have to admit his books are very exciting. A. although B. unless C. until D. once
选 A. 让步状语从句
主句：“I don’t really like the author”
从句：“ I have to admit his books are very exciting. ”
句意：“我确实不喜欢这个作者，虽然我不得不承认他的书是令人激动的”
根据句意来感受一下，是不是有点虽然但是的味道，这时第一直觉是不是要选 A?
4.It was the middle of the night ___ my father woke me up and told me to watch the football game.
A. that B. as C. which D. when
选 D. 时间状语从句
主语：“It was the middle of the night”
从句：“my father woke me up and told me to watch the football game.”
句意：“那是半夜里，我父亲叫我起来看足球比赛”
as 和 when 都可以引导时间状语从句，as 是表示一边..一边..，随着，而这里表达的动作不是连续性的，所以选 when
5.___ the forest park is far away, a lot of tourists visit it every year.
A. As B. When C. Even though D. In case
选 C. 让步状语从句
主句：“a lot of tourists visit it every year.”
从句：“___ the forest park is far away”
句意：“尽管这个森林公园很远，每年有很多游客来参观它。”
6.It’s not easy to change habits, __ with awareness and self-control, it is possible.
A. for B. or C. but D. so
选 C. 转折状语从句
主句：“It’s not easy to change habits”
从句：“__ with awareness and self-control, it is possible.”
句意：“改变习惯是不容易的，但是有意识 自我控制是有可能的”
7.Don’t turn off the computer before closing all programs___ you could have problems
A. or B. and C. but D. so
选 C. 转折从句
句意：“在关闭所有程序之前关掉电脑，否则你有会麻烦。”
这里考的是 Don’t.. or..的使用， or 在这里是否则，要不然的意思。
8.Read this story, ____ you will realize that not everything can be bought with money.
A. or B. and C. but D. so
选 B.
句意：“阅读这个故事，你将会意识到不是所有的东西都可以用钱买到。”
这里没有逻辑上的转换，就是正常的并列句。
9.I was glad to meet Jenny again, ___I didn’t want to spend all day with her.
A. but B. and C. so D. or
选 A. 转折关系
10.It’s much easier to make friends ___ you have similar interests.
A. unless B. when C. even though D. so that
选 B.
句意：“当你们有相同的爱好时，交朋友是容易的”
根据句意第一直觉可能是想选 unless，除非，这时候就需要用”if…not..”替代 unless 放进句子试下，看句子是否通顺。 根据句意推断还是选 when
11.He was so busy. He cannot afford enough time with his son ___ he wants to.
A. even if B. as if C. because D. before
选 A. 让步状语从句。
句子翻译出来，连词也就清楚了。
- My parents don’t mind what job I do _ I am happy.
A. even though B. as soon as C. as long as D. as though
选 C.
as long as 只要
句子翻译出来，连词也就清楚了。
- It just isn’t fair ___I was working as a waiter last month, my friends were lying on the beach.
A. whenever B. though C. for D. while
选 D. 时间状语从句
当主从句都是 doing 时，使用 while。这里考的是 while 的用法，具体的可以看下 时间状语从句中 关于 while 三种用法的详解。
- She had just finished her homework ___her mother asked her to practice playing the piano yesterday.
A. when B. while C. after D. since
选 A
这里不能用 while，因为 while 表示延续性的动作，虽然这里主从都是 doing，但是表达的是突发性写的的事件，所以这里只能用 when
- You may use the room as you like ___ you clean it up afterwards.
A. so far as B. so long as C. in case D. even if
选 B.
so long as 只要，等同于 as long as
- — Shall we have our picnic tomorrow?
— __it doesn’t rain.
A. Until B. While C. Once D. If
选 D. 条件状语从句
句子翻译出来，连词也就清楚了。
中级
- __ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.
A. Although B. As long as C. If only D. As soon as
选 A.
句子翻译出来，连词也就清楚了。
since 有自从和因为两层意思，这里翻译成因为。表示自从主语要用过去式，从句要用现在式，但是这里的句子从句不是现在式。
2.— I wonder how much you charge for your services.
— The first two are free ____ the third costs $30.
A. while B. until C. when D. before
选 A.
这里考的是 while 的“而”表转折的用法。
- You can’t borrow books from the school library ___ you get your student card.
A. before B. if C. while D. as
选 A。
句子翻译出来，连词也就清楚了。
- Owen wouldn’t eat anything ___ he cooked it himself.
A. until B. since C. unless D. while
选 C.
句子翻译出来，连词也就清楚了。
- Just use this room for the time being, and we’ll offer you a larger one ___it becomes available.
A. as soon as B. unless C. as far as D. until
选 A.
这个题容易混淆的点是 as soon as 和 until ，其实这两个在语法上都没有问题，这里选择 as soon as 的原因是需要表达对这件事的强调程度，一..就.. ，也表达了对对方的尊重。
- ___they decide which college to go to, students should research the admission procedures.
A. As B. While C. Until D. Once
选 D.
这里考的是 once 的在状语从句中的意思“一旦，一..就..”，once 有“一次”的意思，在状语从句中表达“一旦，一..就..”
7.There are some health problems that, when ___ in time, can become bigger ones later on.
A. not treated B. not being treated
C. not to be treated D. not have been treated
选 A.
that,when ___ in time, can become bigger ones later on.
这里的 that 是引导的定语从句修饰 health problems.that 作从句的主语，can become 是作谓语。
而 when 引导的是省略句，when they are not treated in time, 这里是被动语句。主语被省略后，谓语也会被去除，treat 变为非谓语形式。关于非谓语形式的介绍可以看下动词相关的篇章。
- The school rules state that no child shall be allowed out of the school during the day, __ accompanied by an adult.
A. once B. when C. if D. unless
选 D.
句子翻译出来，连词也就清楚了。从句用了省略，你看出来了吗？
whe child is
- John thinks it won’t be long ___ he is ready for his new job.
A. when B. after C. before D. since
选 C.
句子翻译出来，连词也就清楚了。
- ___you may have, you should gather your courage to face the challenge.
A. However a serious problem B. What a serious problem
C. However serious a problem D. What serious a problem
选 C.
这里考的是+ever 之后的用法，表示无论如何，首先排除掉 BD。howerver 是副词后面只能跟副词或形容词，A 选项后是跟了 名词短语：a serious problem 所以是不对的。
- Today, we will begin ___we stopped yesterday so that no point will be left out.
A. when B. where C. how D. what
选 A
主句：“ we will begin ___we stopped yesterday”
we stopped yesterday 作时间状语修饰 will begin
从句：“so that no point will be left out.”
句意：“今天，我们从昨天结束的地方开始，这样就不会有任何遗漏了”
12.Hot ___the night air was, we slept deeply because we were so tired after the long journey.
A. although B. as C. while D. however
选 B.
这个是倒装句，是将主系表的表语进行倒装。although while 都有表示“虽然”的意思，但是都不能用倒装，只能用 as.具体可参考让步状语从句中的倒装详解。
13.To show our respect, we usually have to take our gloves off ___ we are to shake hands with.
A.whichever B.whenever C.whoever D.wherever
选 C.
with 后缺宾语，所以选项中可以表示宾语的有 AC，根据句意推出选 C.
- Jack wasn’t saying anything, but the teacher smiled at him ___ he had done something very clever.
A .as if B. in case C. while D. though
选 A.
句子翻译出来，连词也就清楚了。
15.___ hard you try, it is difficult to lose weight without cutting down the amount you eat.
A. However B. Whatever C. Whichever D. Whenever
选 A.
从句是倒装句，hard 跟随连词被提到了句首，因为 hard 是副词属性，所以连词也只能是副词属性，所以 BC 排除，根据句意在 A D 中选择 A。
高级
** 高级语法题，如果想搞清楚，可以去 b 站搜索 英语的平行世界 ，查看“状从高级练习”。**
- _ unemployment and crime are high, it can be assumed that the latter is due to the former.
A. Before B. Where C. Unless D. Until
选 A.
- All the dishes in this menu, _ otherwise stated, will serve two to three people.
A. as B. if C. though D. unless
选 D.
- He had his camera ready _ he saw something that would make a good picture.
A. even if B. if only C. in case D. so that
选 C.
- The meaning of the word “nice’’ changed a few times ___ it finally came to include the sense “pleasant.”
A. before B. after C. since D. while
选 A.
5.Half an hour later, Lucy still couldn’t get a taxi _the bus had dropped her.
A. until B. when C. although D. where
选 D.
6.After the war, a new school building was put up ___there had once been a theatre．
填 where
7.I travel to the Binhai New Area by light railway every day, ___do many businessmen who live in downtown Tianjin．
填 as
从句综合
做这类题之前，需要先判断从句的类型，具体如何判断可以参考 复合从句#一个公式判断所有从句**。是什么从句看主句，用什么连词看从句。**
定语从句 vs 表语从句
- Mary is no longer the girl __ she used to be.
填 : that 定语从句修饰 the girl
所有动词：is , used
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构完整
从句成分是否完整：主系表结构，缺少表语
完整：定语从句
同：首先排除同位语，the girl 不是抽象名词 ×
状：如果作状语从句，就是修饰 is 的，翻译就会变的很奇怪“她以前是不再是那个女孩了”
定：先行词 the girl，将 the girl 带入从句作表语成分 √
选择连接词：将先行词 the girl 带入从句作表语，表语可以使用的表示人的连词有 that/who，而 who 一般不作为表语使用，所以这里是 that.
- Mary is no longer __ she used to be.
填：what 表语从句
所有动词：is, used
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构 缺表语
从句成分是否完整：主系表结构，缺少表语
选择关系词：表语可以使用的表示人的关系词是 who,但是这里不能用 who，因为 Mary 还是曾经那个人，只是她的样子变了，不是人变了，所以用 what。
- Chengdu is no longer the city __ it was ten years ago.
填 : that 定语从句修饰 the city
所有动词：is , was
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构完整
从句成分是否完整：主系表结构，缺少表语，ten years ago 时间状语
完整：定语从句
同：首先排除同位语，the girl 不是抽象名词 ×
状：如果作状语从句，就是修饰 is 的，翻译就会变的很奇怪“成都十年前是不再是那个城市了”
定：先行词 the city，将先行词带入从句作表语成分 √
选择关系词：将先行词带入从句作表语，表语可以使用的表示物的连词有 that/which，而 which 一般不作表语使用，所以这里是 that.
- Chengdu is no longer __ it was ten years ago.
填：what 表语从句
所有动词：is, was
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构 缺表语
从句是否完整：主系表结构，缺少表语，ten years ago 时间状语
选择连接词：表语可以使用的表示物的连词有 that/which，这里只是成都样子变化了，成都还是那个成都，所以不能用 which 代替整体，只能用 what 表特定部分。
- Is this the museum __ I visited last week?
填：that/whcih 定语从句
所有动词： is , visited
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构完整
从句是否完整：主谓宾结构，缺宾语
判断从句类型：主系表结构完整，所以是定状同的一种
定：先行词 the museum，将先行词带入从句作宾语
选择关系词：
定语从句中 作宾语 可以代物 的 关系代词有：that/which
- Is this museum __ I visited last week?
填：what 表语从句
所有动词：is,visited
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构，缺表语
从句是否完整：主谓宾结构，缺宾语
判断从句类型：主句缺表语，所以是表语结构
选择连接词：
表语从句中 可以作宾语的 代物的 连接词有 what/which，思考这里为什么用 what 而不是 which ?
- Is this the research center __ you visited the modern equipment last year?
填： 定语从句
所有动词：is,visited
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构，完整
从句是否完整：主谓宾，完整
判断从句类型：
主句的结构是完整的，所以只能是定状同中的一种，首先排除同位语从句，因为主句中没有抽象名词。
定：主句中有先行词 the research cente，从句成分完整，带入从句作地点状语
选择关系词：
定语从句中 作地点状语的副词 的 只有 where，显然这里 where
- Is this research center __ you visited the modern equipment last year?
填：where 表语从句
所有动词：is,visited
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构，缺表语
从句是否完整：主谓宾，完整
判断从句类型：主句缺表语，所以是表语从句
选择连接词：
表语从句中 作地点状语的副词 只有 where
定语从句 vs 主语从句
- All _ is needed is a supply of oil.
填：that 定语从句
所有动词：is ,is
连词个数(v-1)：1
所有连词：无
主句是否完整：主系表结构完整
从句是否完整：主系表结构，缺主语
判断从句类型：
all 是不定代词，作为先行词带入从句作主语。
选择连接词：
当先行词是 all, something, anything, nothing,somebody, anybody, nobody 等不定代词时，只能用 that.
- _ is needed is a supply of oil.
填：what 主语从句
所有动词：is ,is
连词个数(v-1)：1
所有连词：无
主句是否完整：主系表，主语从句
判断从句类型：第二个 is 前是主语，从句作了主语
从句是否完整：主系表结构，缺主语
选择连接词：
主语从句中 代物 的有 what /which ，这里是 what，因为 which 是在限定范围后选择某一个，很显然这里的是没有限定范围的。
- Everything _ he said at the meeting astonished everybody present.
填：that
所有动词：said, astonished
连词个数(v-1)：1
所有连词：无
主句是否完整：主句完整
从句是否完整：主谓宾，缺宾语，at the meeting 作地点状语修饰 said
判断从句类型：定语从句，先行词 everything
选择连接词：
当先行词是 all, something, anything, everthing,nothing,somebody, anybody, nobody 等不定代词时，只能用 that.
- _ he said at the meeting astonished everybody present.
填：what 主语从句
所有动词：said,astonished
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表结构，从句作主语
从句是否完整：主谓宾，缺宾语
判断从句类型：主语从句
选择连接词：主语从句缺宾语，选关系代词，what
定语从句 vs 同位语从句
- Last night I dreamed a dream _ I passed the entrance examination.
填：that 同位语从句
所有动词：dreamed ，passed
连词个数(v-1)： 1
所有连词：无
主句是否完整：主谓宾，完整，Last night 作时间状语
从句是否完整：主谓宾，完整
判断从句类型：同位语从句
抽象名称 dream，主从句完整，dream = 从句
选择连接词：
同位语从句不缺成分，这里使用 that 不做成分
- The dream _ I dreamed last night was very funny.
填：what/whcih 也可以省略 定语从句
所有动词：dreamed ,was
连词个数(v-1)：1
所有连词：无
主句是否完整：主系表结构
从句是否完整：主谓宾结构，缺宾语
判断从句类型：
定语从句，先行词 the dream，带入从句作宾语
选择连接词：定语从句缺宾语，选连接代词，what/whcih
- The promise _ you will love me forever sounds nice.
填：that 同位语从句
所有动词：will love,sounds
连词个数(v-1)：1
所有连词：无
主句是否完整：主系表，完整
从句是否完整：主谓宾，完整
判断从句类型：同位语从句
抽象名词 promise，主从句完整，promise=从句
选择连接词：
同位语从句不缺成分，这里使用 that 不做成分
- The promise _ you made last year has gone with the wind.
填：what/whcih 也可以都省略 定语从句
所有动词：will love,sounds
连词个数(v-1)：1
所有连词：无
主句是否完整：主谓宾，完整
从句是否完整：主谓宾，缺宾语， last year 时间状语
判断从句类型：定语从句
先行词 promise 带入从句作宾语
选择连接词：
定语从句缺宾语，连接代词，what/whcih
定语从句 vs 强调句
** It is/was + 介词 的形式，需要优先考虑下是强调句**
- Was it during the Second World War__ he died?
填：that 强调句
所有动词：was , died
连词个数(v-1)： 1
所有连词：无
主句是否完整：主系表，完整
从句是否完整：die 是不及物动词，所以从句成分完整
判断从句类型：强调句
主句成分完整，就是定状同中的一种，首先排除掉同位语。
作定语：修饰 the Second World War，我们试着翻译一下，“这是在他死的二战期间”，感觉有点怪，语句不通顺，定语从句排除掉
作状语：如果作时间状语修饰 was，我们还是来试着翻译一下，“当他死的时候是在二战期间”，这次翻译好像通顺了，这就是状语从句了吗？等等。。是不是忘了前面的 it was，当我们将 it was 的翻译带入时，“这是当他死的时候在二战期间”，是不是也感觉怪怪的，难道状语从句也不是？
没错这就是强调句的形式。
选择连接词：
强调句的形式是 it is/was +that，所以这里的连词是 that。我们将 it was that 去掉，整个句子还是完整的，这就是强调句。
- It was the hour __ the place was full of job-hunters.
填：when /during which 定语从句
所有动词： was,was
连词个数(v-1)：1
所有连词：无
主句是否完整：主系表结构 完整
从句是否完整：主谓宾结构，被动语态，完整
判断从句类型：强调句
主句成分完整，就是定状同中的一种，首先排除掉同位语，因为时间不是抽象名词。
作定语：先行词 the hour 作时间状语修饰 was ，表示这个时候，我们试着翻译一下“这是求职者填满这个地方的时间”
选择连接词：
先行词在定从中作时间状语，所以用 when，when 也可以转换成介词+which 的形式，during whcih .
- It was at the theater __ Lincoln was murdered.
填：
所有动词：
连词个数(v-1)：1
所有连词：无
主句是否完整：
从句是否完整：
判断从句类型：
选择连接词：
- It was the theater __ Lincoln was murdered.
填：
所有动词：
连词个数(v-1)：1
所有连词：无
主句是否完整：
从句是否完整：
判断从句类型：
选择连接词：
- Make a mark __ you have any questions.
填：
所有动词：
连词个数(v-1)：1
所有连词：无
主句是否完整：
从句是否完整：
判断从句类型：
选择连接词：
- Make a mark at the place __ you have any questions.
填：
所有动词：
连词个数(v-1)：1
所有连词：无
主句是否完整：
从句是否完整：
判断从句类型：
选择连接词：
We shall go __ working conditions are difficult.
We shall go to the place __ working conditions are difficult.
The article is written in such easy English___ all of us can read it.
The article is written in such easy English ___ all of us can read.
I have never seen such a clever man ____ he.
He made such an excellent speech ____ everyone respected him.
He succeeded in the exam, __made his parents happy
Tom’s mother kept telling him that he should work harder, but _ didn’t help.
Last night I took a taxi, and __ took me home.
Last night I took a taxi, __ took me home.
__is known to us all is that the earth goes around the sun.
__is known to us all that the earth goes around the sun.
__is known to us all, the earth goes around sun.
Is this the factory __ you worked three years ago?
Is this factory __ you worked three years ago?
This is the factory __ we visited last year.
This is the factory __ my father is working at.
We still remember the first film, __was about a woman doctor.
We still remember the first film __ was about a woman doctor.
Was it on October 1,1949 __the People’s Republic of China was founded？
Was it October 1,1949 __the People’s Republic of China was founded？
__ hard he works, he won’t succeed.
Hard__ he works, he won’t succeed.
__ he works hard, he won’t succeed.
__his hard work, he won’t succeed.
He works hard; he won’t succeed, ____.
The reason he has been such a success is __he never gives up.
The reason__ I burst into tears is that I don’t want to part from my mother.
The reason __he told us sounds reasonable.
It is at five o’clock __we’ll meet again.
It was five o’clock __we left for Shanghai.
It is five hours __he left.
It will be five hours __we meet again.
**
