【弯道超车】Unit 7 When Tomorrow Comes 核心语法之时间状语从句-2026-2027学年人教版(新教材)八年级英语上册精讲精练 (含答案解析)

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【弯道超车】Unit 7 When Tomorrow Comes 核心语法之时间状语从句-2026-2027学年人教版(新教材)八年级英语上册精讲精练 (含答案解析)

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/ 让学习更有效 新课备课备考 | 英语学科
2026-2027学年人教版八年级英语上册核心语法精讲精练
(新教材)Unit 7 When Tomorrow Comes
核心语法:时间状语从句
一、核心概念
时间状语从句在复合句中充当时间状语,说明主句动作发生的时间。它由从属连词引导,放在主句之前或之后。
核心功能: 用一个句子来说明动作发生的“时间”。
位置:
从句在前:引导词 + 从句, + 主句
从句在后:主句 + 引导词 + 从句
示例:
When I arrived, the meeting had started.(当我到达时,会议已经开始了。)
I was watching TV when my mother came in.(我妈妈进来时,我正在看电视。)
二、常见引导词分类与详解
1. when(当……时候)
含义: 表示主句动作发生在从句动作的时间点上。从句动词可以是瞬间动词或延续性动词。
例句:
When I arrived at the station, the train had left.(当我到达车站时,火车已经开走了。)→ 瞬间动词
When I was a child, I lived in the countryside.(我小时候住在农村。)→ 状态动词
I was sleeping when the earthquake happened.(地震发生时我正在睡觉。)→ 瞬间动词
2. while(当……时候,在……期间)
含义: 强调主句和从句动作同时持续进行。从句动词必须是延续性动词,且常用进行时。
例句:
While I was reading, my brother was playing.(我在读书时,弟弟在玩。)→ 两个动作同时进行
Please be quiet while others are studying.(别人学习时请保持安静。)→ 从句用进行时
While he was sleeping, someone stole his bag.(他睡觉时,有人偷了他的包。)
注意: while 从句中不能用瞬间动词!
While I arrived, he was leaving.
When I arrived, he was leaving.
3. as(一边……一边……;随着)
含义: 表示两个动作同时发生,强调伴随性。也可表示“随着……”的渐进变化。
例句:
She sang as she walked.(她边走边唱。)
As time goes by, we become wiser.(随着时间的推移,我们变得更聪明。)
He smiled as he said goodbye.(他说再见时微笑着。)
when / while / as 对比:
when while as
动作类型 瞬间/延续 必须延续 延续
时间关系 某一时间点 同时持续 同时伴随
进行时要求 不必须 常用进行时 常用进行时
4. before(在……之前)
含义: 从句动作发生在主句动作之前。
例句:
Please turn off the lights before you leave.(离开之前请关灯。)
I had breakfast before I went to school.(上学之前我吃了早饭。)
Think it over before you make a decision.(做决定之前先想清楚。)
5. after(在……之后)
含义: 从句动作发生在主句动作之后。
例句:
After I finished my homework, I went out to play.(做完作业后,我出去玩了。)
We went home after the movie ended.(电影结束后我们回家了。)
After he arrives, we will start the meeting.(他到了之后,我们就开始会议。)
6. until / till(直到……为止)
含义: 主句动作一直持续到从句动作发生为止。
用法区别:
肯定句 + until:主句动词必须是延续性动词(wait, stay, work, sleep等)
否定句 + until(直到……才):主句动词可以是瞬间动词(leave, go, stop, finish等)
例句:
I waited at the bus stop until the bus came.(我在公交车站一直等到公交车来。)→ 延续动词
She didn't go to bed until her mother came back.(她直到妈妈回来才睡觉。)→ 瞬间动词 + 否定
Please stay here until I return.(请待在这里直到我回来。)→ 延续动词
7. since(自从……以来)
含义: 表示从过去某个时间点一直持续到现在。
结构: 主句(现在完成时)+ since + 从句(一般过去时)
例句:
I have lived here since I was born.(我自出生起就住在这里。)
She has worked in this company since she graduated from college.(她自从大学毕业就在这家公司工作。)
Great changes have taken place since he left.(自从他离开后,发生了巨大的变化。)
8. as soon as(一……就……)
含义: 表示两个动作紧接着发生,时间间隔很短。
例句:
I will call you as soon as I arrive in Beijing.(我一到北京就给你打电话。)→ 主将从现
As soon as I got home, it began to rain.(我一到家就开始下雨了。)→ 过去时
He fell asleep as soon as he lay down.(他一躺下就睡着了。)
三、核心语法规则:“主将从现”(中考必考!)
规则: 在时间状语从句中,如果主句是将来时,从句用一般现在时表示将来。
结构: 主句(将来时)+ 引导词 + 从句(一般现在时)
例句:
I will call you when I arrive in Beijing.(我到北京时会给你打电话。)→ 主句将来时,从句用一般现在时
We will have dinner after he comes back.(他回来后我们就吃晚饭。)→ 同上
Please wait here until the bus stops.(请在这里等到公交车停下来。)→ 祈使句也表将来
As soon as he arrives, I will tell him the news.(他一到我就告诉他这个消息。)
易错提醒: 从句中不能用 will 表将来!
I will call you when I will arrive.
I will call you when I arrive.
四、when 与 while 的深度辨析(高频考点)
对比维度 when while
从句动词 瞬间动词 或 延续性动词 必须是延续性动词
从句时态 一般过去时 或 过去进行时 必须用进行时(过去/现在)
强调重点 某一时间点 同时持续的过程
典型例句 When I arrived, he was leaving. While I was reading, he came in.
表示习惯 When I was young... While I was growing up...
判断技巧:
从句动词是瞬间动词(arrive, see, leave)→ 用 when
从句动词是延续动词(read, sleep, work)→ 用 when 或 while
从句是进行时,强调“在……过程中”→ 用 while
对比例句:
When I saw him, he was running.(看到他的那一刻,他正在跑。)→ 瞬间动作
While I was reading, the phone rang.(我正在读书时,电话响了。)→ 持续过程
When I was young, I lived in the country.(我小时候住在农村。)→ 状态动词
五、易错点与难点突破
1. 从句中误用将来时
I will wait here until you will come back.
I will wait here until you come back.
2. before 和 after 的时态混淆
After I come home, I had dinner.(过去时态不一致)
After I came home, I had dinner.
Before he arrived, I have already left.(应为过去完成时)
Before he arrived, I had already left.
3. since 的时态错误
Since I have come here, I made many friends.
Since I came here, I have made many friends.
I lived here since I was born.
I have lived here since I was born.
4. until 与 not...until 的混淆
I didn't wait until he came back.(wait 是延续动词,用肯定)
I waited until he came back.
I left until he came back.(leave 是瞬间动词,用否定)
I didn't leave until he came back.
5. when 与 while 的选择错误
While I arrived, he was leaving.
When I arrived, he was leaving.
When I was reading, the phone rang.(when 也可用,但 while 更强调“过程”)
While I was reading, the phone rang.
六、记忆口诀
引导词口诀:
when, while, as 表时间,before, after 前后连;
until 直到……才,since 自从主完现;
as soon as 一……就,主将从现记心间。
when/while 口诀:
when 可长也可短,while 必须长持续;
when 接过时也接进,while 接进不接过;
when 表时间点,while 表过程。
主将从现口诀:
时间条件状语句,主将从现要牢记;
主句将来从句现,will 不能从句现。
七、思维导图总结
1.Some scientists believe that it won't be long ________ artificial intelligence completely takes the place of human beings.
A.before B.after C.since D.when
2. — When will you come to Changchun
—I'll call you____ I arrive.
A.as soon as B.while C.until D.although
3.When the teacher came into the classroom, I ________ the class project with my team.
A.discuss B.discussed C.was discussing D.will discuss
4. He didn't. leave the office____he finished all the work.
A.as soon as B.until C.because D.If
5.He's going to _____ an engineer when he _____ up.
A.do; grows B.be; grow C.be; grows
6. I'll go to visit my aunt in England ____ the summer holiday starts.
A.while B.as soon as C.since
7.Be careful! Don't get off ________ the bus stops.
A.after B.when C.until D.if
8. Peter was hiding behind a tree ____ a snowball hit him.
A.when B.while C.as
9.I will put the keys on the table when I ______________ the room.
A.left B.leave C.am leaving
10. Don't worry.When your son ____ at Beijing Railway Station tomorrow, the teacher from Ren'ai must be there to meet him.
A.arrives B.arriving C.arrived D.will arrive
11.Newton was playing under an apple tree _______ an apple fell on his head.
A.until B.while C.when D.after
12.The students didn't stop talking _______ the teacher came in.
A.if B.until C.because
13.—While I _______ my homework yesterday evening, my mother _______ e-books.
—What was your father doing then
A.was doing; read B.did; was reading
C.was doing; was reading D.did; read
14.Amy was reading a book __________I came in.
A.when B.while C.because D.Though
15.—You can't cross the street now. You have to wait _______ the traffic lights turn green.
—Oh, sorry and thank you.
A.when B.after C.until D.while
16.There was too much homework yesterday. I didn't finish it _______11 o'clock last night.
A.on B.for C.until D.from
17.Henry will give us a report as soon as he ___________.
A.arrives B.arrived C.is arriving D.will arrive
18. My family were sleeping when the earthquake ____ .
A.start B.started C.was starting
19. I was doing my homework yesterday evening, Mother was cooking dinner.
A.When B.While C.As D.Since
20.We won't have dinner until my father ________ back.
A.will come B.come C.came D.comes
21.While Mike _______ for his dog, he fell into a river.
A.looked B.was looking C.would look D.was looked
22.Tom knew nothing his friend told him.
A.because B.until C.since D.if
23.You can't use the phone ____ we are far from the gas station.
A.after B.when C.so D.until
24.What were you doing ________ your mother was cooking supper
A.where B.what C.how D.while
25.We'd better arrive earlier the film starts, or we'll miss the beginning.
A.before B.as C.when D.after
26. — When will you go to see your grandpa
—I' ll see him ____ I get off the plane. He is waiting for me at the airport.
A.as soon as B.as long as
C.as far as D.as easily as
27.________ I got back, I found my mother cooking for me.
A.Since B.Before C.When
28.My brother ___ while he ___ his bicycle and hurt himself.
A.fell, was riding B.fell, were riding
C.had fallen, rode D.had fallen, was riding
29. Many people have lived in the town ____ they were born.
A.for B.when C.before D.since
30.—During breaks, most of us have fun playing ________ Andy is always learning.
—All work and no play make Jack a dull boy. I think Andy should have a rest.
A.since B.if C.after D.while
31.Tom rushed into the house his mother was cooking.
A.until B.before C.while D.after
32. My hometown has changed a lot ____ the underground was put to use.
A.unless B.since C.if D.when
33.When we ________on holidays, we ________a lot of beautiful photos.
A.are; took B.were; took C.were; take D.will be; take
34.Susan didn't do her homework _________ her mother came back yesterday.
A.so B.until C.but D.or
35.I was walking along the river slowly _____ I heard someone shouting for help.
A.when B.while C.after D.since
36.As she ____ the newspaper, Granny ___ asleep.
A.read; was falling B.was reading; fell
C.was reading; was falling D.read; fell
37.—Betty, do you know if Tony _____ the photo competition
—He will if he _____ his project in Australia.
A.enters; finishes B.enters; will finish
C.will enter; finishes D.will enter; will finish
38. I was talking on the phone, my mother arrived at home.
A.when B.until C.while D.although
39. It ____ ten years since my uncle ____ to work in Beijing.
A.is; went B.has been; has gone
C.was; went D.has been; went
40.—Your English is so goo D. How long have you learnt English
—____ I was five.
A.Before B.Until C.Since D.When
41.— When will she arrive
— ______________ she arrives, I will let you know.
A.Because B.As soon as C.Though
42. I didn't realize she was a famous singer____she took off her sunglasses.
A.until B.when C.after D.while
43.You can go to the 24-hour shop ___________ you want.
A.whoever B.whatever C.whenever D.however
44.He____ his leg while he______ on the playground.
A.broke; has run B.was breaking; was running
C.broke; was running D.was breaking ran
45.We were reading the new words of Module 11 ________ Miss Du came into the classroom.
A.though B.when C.until D.if
46.——I am going to Qingdao and stay there for a week.
——______ you are there, would you please buy some books for me
A.If B.While C.Since D.As soon as
47.Tom ______ into the house when no one ______.
A.slipped; was looking B.slipped; had looked
C.had slipped; looked D.was slipping; looked
48. ____ we didn't win the match, we were still full of confidence.
A.Because B.If C.Although D.Since
49.Li Jiankun was walking past the school gate ________ he saw a wallet ________ on the ground.
A.while; lie B.when; lying C.while; lying D.when; lay
50.When she a newspaper, grandma asleep.
A.read; was falling B.was reading; fell
C.was reading; was falling D.read; fell
参考答案及试题解析
1.A
【解析】句意:一些科学家认为用不了多久人工智能就能完全取代人类。before在……之前;after在……之后;since自从……以来;when当……时候。根据 It is/was not (won't be) long before… “不久就……”是英语中的常用句型,故选A。
【点评】考查连词辨析。注意识记It is/was not (won't be) long before…的用法。
2.A
【解析】句意:——你什么时候来长春?——我一到就给你打电话。A:一......就……B:虽然,C:直到,D:虽然,call you和I arrive是同时发生的,arrive是瞬间动词,故用as soon as引导时间状语从句,故选A。
【点评】考查,注意识记as soon as的用法。
3.C
【解析】句意:当老师走进教室时,我和我的团队正在讨论班级项目。本句是when引导的时间状语从句,从句用一般过去时,主句用过去进行时(was/were doing),表示"从句动作发生时,主句动作正在进行",故选C。
【点评】考查过去进行时。要结合语境和语法知识精准判断啊句子时态,选择正确答案。
4.B
【解析】句意:"直到完成所有工作,他才离开办公室",从语义上看,主句中动词 leave 为瞬间动词,且包含否定词 didn't,符合 not...until... 的固定结构,意为 "直到…… 才……";as soon as 表 "一…… 就……"、because 表原因、if 表条件,均不符合该固定句式与语境逻辑,故答案为 B。
【点评】考查时间状语从句连词的语境运用,重点掌握 not...until... 的固定搭配,同时区分瞬间动词与延续性动词在该句式中的用法要求。
5.C
【解析】句意:当他长大了他想做个工程师。to be加职业,想做……;grow up长大,在when引导的时间状语从句中主句用将来时态,从句用一般现在时。故选C。
【点评】考查固定搭配be+名词,grow up。when引导的时间状语从句中的主将从现。
6.B
【解析】句意:暑假一开始,我就将去英国拜访我的姑姑。while当……时;as soon as一……就;until直到。根据语境可知"暑假一开始就去英国",故用连词as soon as,一……就……,符合语境。故选B。
【点评】考查连词辨析。注意正确理解选项中连词的意思,根据题目所给语境选择正确的连词。
7.C
【解析】句意:小心!直到公共汽车停下来才能下车。after在……之后;when当……时;until直到;if如果。not…until…直到……才……,固定搭配。故选C。
【点评】考查连词辨析,固定搭配和时间状语从句。注意固定搭配not…until…的正确用法。
8.A
【解析】句意:当一个雪球投着他的时候,彼得正藏在树后面。when这时,当…...时,可表示一个时间点,也可表示一个时间段(动词是延续性和短暂性);while当…..时,表示一个时间段(动词是延续性动词);as当…...时,强调动作延续性。分析句子,由题干中hit可知表示一个"时间点",故用连词
when,此句型为be doing sth. when...正在做…...这时…...。故选A。
【点评】考查连词辨析。注意理解每个连词的用法。
9.B
【解析】句意:我离开房间时会把钥匙放在桌子上。A.离开,一般过去时;B.离开,一般现在时;C.正在离开,现在进行时。when引导的时间状语从句,从句用一般现在时,主句用一般将来时,when所在句子是从句,所以用一般现在时,主语是 I,所以leave用原形,故选B。
【点评】考查when引导的时间状语从句,注意平时识记固定搭配从句用一般现在时,主句用一般将来时,根据主语单复数确定谓语形式。
10.A
【解析】句意:放心吧,明天你儿子到北京站的时候,仁爱学校的老师一定会去迎接他的。A单三式,B动名词,C过去式,D将来时,when引导时间状语从句时态用主将从现,故从句时态是一般现在时,主语是第三人称单数,故用单三式,故选A。
【点评】考查时态,注意识记主谓一致的用法。
11.C
【解析】句意:当牛顿在树底下玩得时候,这时一个苹果落到了他的头上。这里是when引导的时间状语从句,这时的意思;A. until直到;B. while当……的时候;C. when当……的时候;D. after在……之后。根据题意,故选C。
12.B
【解析】句意: 直到老师进来了学生们才停止说话。A如果,直到,C因为,根据The students didn't stop talking,停止谈话,和the teacher came in,老师进来,可知此处是时间关系,not...until...,固定搭配,直到……才,引导时间状语从句,故选B。
【点评】考查连词,注意not...until...引导时间状语从句的用法。
13.C
【解析】句意:——当我昨天夜晚做作业时,我的妈妈在读电子书。——你的爸爸当时在做什么?根据while的用法,在while引导的状语从句中,主从句都用过去进行时。过去进行时的构成形式是was/were+doing。故选C。
【点评】考查while引导的状语从句,与过去进行时连用的用法。
14.A
【解析】本题考查be doing...when,译为Amy正在读书突然我进来了。本题易错选while, while从句多用延续性动词,本题中come为瞬间动词,故选A。
15.C
【解析】句意:——你现在不能过马路。你不得不等到交通灯变成绿色。A. 当······时候,B. 在······之后,C. 直到,引导时间状语从句,D. 当······时候,wait是延续性动词,和until连用,表示等这个动作延续到交通灯变绿的时候,故选C。
【点评】考查时间状语从句的连接词。根据语境选出合适的连词。
16.C
【解析】句意:昨天有很多作业。我直到昨天晚上11点才完成。on在……上面;for为了;until直到; from来自。not ...until...“直到……才……”,故选C。
【点评】本题考查时间状语从句,not ...until...“直到……才……”,是固定搭配,引导时间状语从句。
17.A
【解析】根据主将从现规则,从句应为一般现在时,主语为第三人称,故选A。
18.B
【解析】句意:当地震发生的时候,我们全家正在睡觉。A是动词原形,B是动词的过去式,C是过去进行时。句子是when引导的时间状语从句,主句是过去进行时,从句是一般过去时,动词start用过去式started,故选B。
【点评】考查动词的形式。注意通过语境确定时态,从而确定谓语动词的形式。
19.B
【解析】句意:昨天晚上当我在做作业的时候,妈妈在做晚饭。while连词,当…时候,引导时间状语从句,后跟进行时态。所以选B。
【点评】此题考查连词词义辨析。
20.D
【解析】句意:直到我父亲回来我们才吃晚饭。A、会来,B、来,C、来,D、来,根据until,直到,引导时间状语从句,如果主句是一般将来时,从句要用一般现在时代替一般将来时,即主将从现,主语my father,第三人称单数,所以动词come用第三人称单数comes,故答案为D。
【点评】考查时间状语从句,注意主句和从句遵从主将从现的原则。
21.B
【解析】句意:当麦克正在找狗时,他掉进河里了。while,当……时候,引导的从句用进行时,look是延续性动词,因此用过去进行时,故选B。
【点评】此题考查过去进行时。注意while引导的从句用进行时。
22.B
【解析】句意:直到他的朋友告诉他,汤姆才知道这件事。because因为;until直到……为止;since自从;if如果,是否。not...until“直到……才”,根据句意, 故答案选B。
【点评】考查连词的用法。
23.D
【解析】句意:我们直到离加油站很远,才用手机。A之后,B何时,C所以,D直到,not... until是从属连词,引导时间状语从句,表示直到......才。故选D。
【点评】考查连词辨析。注意选项中的陷阱,如近义词混淆、语法错误等。积累词汇和语法知识,扩大词汇量,掌握常见词汇和短语的用法。
24.D
【解析】根据题干和选项提示可推知句意为:当你的母亲在做饭的时候,你在做什么?这里是while引导的时间状语从句,这两个动作是同时发生的。 A. where在哪;B. what什么;C. how怎样,如何;D. while当……的时候。比较可知,选项D符合句意,故答案为:D
【点评】考查疑问词while引导的时间状语从句。
25.A
【解析】句意: 我们最好在电影开始前早点到达,否则我们会错过开头。A.在……之前;B.因为,既然;C.当……的时候;D.在……之后。根据 we'll miss the beginning 可知,我们最好在电影开始之前早点到达。故选A。
【点评】考查连词辨析,注意before引导的时间状语从句的用法。
26.A
【解析】句意:——你什么时候去看你的爷爷?——我一下飞机就去看他。他正在机场等我。Though虽然;as soon as一……就;as long as只要;as far as就……而言。结合语句"—When will you go to see your grandpa —I'll see him … I get off the plane. He is waiting for me at the airport."可知,此处表达"一……就"的含义,引导时间状语从句,as soon as符合语境,故选A。
【点评】考查短语辨析。解题需根据句子的时间逻辑关系判断合适的短语。
27.C
【解析】句意:……我回来,我发现我妈妈在为我做饭。根据句意可知应该为当我回来的时候,故选C。
【点评】考查从句的应用。
28.A
【解析】句意:当我弟弟骑他的自行车时,他掉下来受伤了。while,当……时候,引导时间状语从句。后面要用进行时,且要与句子的时态保持一致,所以用过去进行时,根据主语为he,所以用was riding,且前一个空掉下来与受伤hurt也应时态一致,所以用fell,故选A。
【点评】考查动词的时态。注意句子的时态应该一致,且while引导状语从句时,后面要用进行时。
29.D
【解析】句意:——许多人自从他们出生就一直住在这个城镇。A. for为了;B. when当……时;C. before在……之前;D. since自从。
根据have lived是现在完成时可知,对于现在完成时表时间时,since后接时间点,而for后接时间段,结合were born(出生)是一个时间点,应用since,表示"自……以来",故答案为:D。
【点评】考查连词辨析。注意要阅读题干把握时态,根据句子时态来确定连词的正确形式,选出符合题意的选项。
30.D
【解析】句意:——休息时,我们大多数人都玩得很开心,而安迪则一直在学习。——只工作不玩耍,聪明孩子也变傻。我认为安迪应该休息一下。since自从;if如果;after在……之后;while然而。根据"During breaks, most of us have fun playing …Andy is always learning."可知,此处表示从句的动作和主句动作同时发生,应用while引导时间状语从句。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。
31.C
【解析】句意:汤姆妈妈做饭时,他冲进了房子。A.直到……时;B.在……之前;C.当……的时候;D.在……之后。根据Tom rushed into the hous和his mother was cookin是同时进行的,故选C。
【点评】考查连词辨析和时间状语从句,注意while引导的时间状语从句。
32.B
【解析】 句意:自从地铁投入使用以来,我的家乡发生了很大的变化。 since自从,引导时间状语从句,强调从过去某个时间点开始一直持续到现在,与完成时连用;unless除非,引导的条件状语从句,表示排除的条件;if如果,引导的条件状语从句,when当……时,与一般现在时或一般过去时连用。
【点评】考查连词辨析。理解连词的词义和用法,根据句子的时态,选择正确的连词。
33.B
【解析】句意:我们度假时,拍了很多漂亮的照片。本句为when引导的时间状语从句,“度假”发生在过去,主句“度假”和从句“拍照”的动作先后发生,故主句、从句都应为一般过去时。故答案选B。
【点评】考查when引导的时间状语从句,注意前后句句子时态一致。
34.B
【解析】 句意:苏珊直到她妈妈昨天回来才做作业。 固定搭配,not...until,直到……,A因此,B直到,C但是,D或者。故选B。
【点评】考查连词。注意固定搭配的使用。
35.A
【解析】句意:我正沿着河边慢慢地走着,这时我听到有人喊救命。 A.当……的时候;B.而,在……的时候;C.在……之后;D.既然,因为。 此句表示同时发生,排除CD;从句是一个短暂性动作,而主句是一个持续性动作,可以 when 但不用 while。 故选A。
【点评】考查状语从句,注意when引导的时间状语从句的用法。
36.B
【解析】句意:当她看报纸的时候,奶奶睡着了。短语,read the newspaper,读报纸;fall asleep,入睡。由as提示前半句要用过去进行时态,后半句要用一般过去时,故选B。
【点评】考查一般过去时与过去进行时的基本结构及用法。
37.C
【解析】句意:——贝蒂,你知道托尼是否能进入摄影比赛吗?——如果他澳大利亚完成了他的项目就可以。enter 进入,finish完成。根据答语中的“He will”可知问句中的宾语从句的时态应该用一般将来时,在含有 if 引导的条件状语从句的主从复合句中,主句是一般将来时,从句用一般现在时表将来。故选 C。
【点评】考查台哦见状语从句和宾语从句。注意两种从句的时态用法。
38.C
【解析】句意:我在打电话时,我妈妈到了家。when 和while都译作“当……的时候”。while强调主句谓语动词表示的动作持续于while从句所指的整个时间内;when可以指主句谓语动词和从句谓语动词所表示的动作同时或先后发生。until直到;although尽管。故选C。
【点评】考查while引导的时间状语从句,表示从句动作进行过程中发生主句动作。
39.D
【解析】句意:自从我叔叔去北京工作已经有十年的时间了。根据"since+一般过去时从句"搭配现在完成时可知,主语it为三单,主句用has been;since引导的从句用一般过去时,go的过去式为went。故选D。
【点评】考查since引导的时间状语从句,理解句意。
40.C
【解析】句意:—— 你的英语真好。你学英语多久了? ——从我五岁的时候开始的。A.在……之前;B.直到;C.自从;D.当……时候。根据How long have you learnt English ,可知答句需用since+一般过去时表示从······开始,since引导的时间状语从句,从句用一般过去时,主句用现在完成时,符合语境,故选C。
【点评】考查连词辨析。注意since引导时间状语从句的用法。
41.B
【解析】句意:—她将什么时间到达?—她一到,我就会让你知道。because因为,引导原因状语从句;as soon as一……就……,引导时间状语从句;though尽管,引导让步状语从句。结合句意,可知该句表示的是时间,故选B。
42.A
【解析】句意:"直到她摘下太阳镜,我才意识到她是一位著名歌手",从语义上看,"意识到" 这个瞬间动作发生在 "摘下墨镜" 这个时间点之后,符合 not...until... 的固定结构,意为 "直到…… 才……";when 表 "当…… 时"、after 表 "在…… 之后"、while 表 "当…… 时(后接延续性动词)",均不符合该固定结构与语境逻辑,故答案为 A。
【点评】考查时间状语从句连词的语境运用,注意掌握 not...until... 的固定句式,区分瞬间动词与延续性动词在时间状语从句中的用法差异。
43.C
【解析】考查状语从句,A. whoever意思是无论谁,B. whatever意思是无论何事,C. whenever意思是无论何时,D. however无论怎么样,该题需要根据题意回答即无论你何时想去,你都可以去24小时营业的商店,whenever做时间状语,故答案为C。
44.C
【解析】句意:当他正在在操场上跑步时他伤了腿。while引导的时间状语从句,从句用过去进行时,主句用一般过去时,排除B、D。过去进行时的结构是was/were+动词ing,主语是he,所以用was,run的ing是running,故选C。
【点评】考查while引导的时间状语从句,注意平时识记过去进行时的结构。
45.B
【解析】句意:当杜老师走进教室时,我们正在读第十一单元的生词。though虽然;when当……时候;until直到;if如果。根据"Miss Du came into the classroom"可知,表示"杜老师进来时,我们正在读单词",需要用when引导时间状语从句。故选B。
【点评】考查连词辨析。理解连词的词义和用法,根据主句的动作发生在从句动作之中,选出正确的连词。
46.B
【解析】句意:你在那儿时能给我买一些书吗?A. If如果; B. While在……时候; C. Since自从;D. As soon as一……就……,根据上文“我”已打算去青岛,所以应选while,故选B。
【点评】考查连词
47.A
【解析】句意:汤姆在没人看的时候溜进了房子。此处是when引导的时间状语从句。when引导的时间状语从句,表示一个动作正在进行(过去进行时),另一个动作插入(过去式)。故此处应用过去进行时即be+Ving,此处主语是Students,be动词用were,故选A。
【点评】考查过去进行时。注意识记when引导的时间状语从句两边所用时态。
48.C
【解析】句意:虽然我们没有赢得比赛,但我们仍然充满信心。A.因为,表示原因;B.如果,表示条件;C.尽管,表示让步;D.自从。we didn't win the match我们没有赢得比赛,we were still full of confidence我们仍然充满信心,可知前后句表示让步,即虽然我们没有赢得比赛,但我们仍然充满信心。所以用although,故选C。
【点评】考查连词辨析,首先识记连词区别,然后根据前后句句意确定连词。
49.B
【解析】句意:李建坤路过校门时,看到地上有一个钱包。when/while都表示"当……时",但 when 后面的动词可以是延续性动词或非延续性动词,而while 后面的动词必须是延续性动词。从句中saw是短暂性动词,所以第一空用when,排除A、C;see sb doing sth"看见某人正在做某事";see sb do sth"看见某人做了某事",lie"处于,保持(某种状态)",现在分词是lying,过去式是lay,所以此处用lying。故选B。
【点评】考查连词辨析和固定搭配see...doing sth.,理解句意。
50.A
【解析】句意:当她读报纸时,奶奶正在睡觉。read睡觉,实义动词;fall落下,实义动词。when引导的时间状语从句,从句用一般过去时,read的过去式是read,主句用过去进行时,时态是过去进行时,结构是was/were+动词ing,主语是单数grandma,所以be动词用was,fall的ing是falling,故选A。
【点评】考查when引导的时间状语从句,注意平时识记从句用一般过去时和主句用过去进行时。
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