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Unit 8 Natural disasters一、过去进行时1.定义过去进行时表示过去某一时刻正在进行的动作或过去某一段时问一直在进行的动作。
如：I was doing my homework at 8 P.m.1ast night. 昨晚8点我正在做家庭作业。
What were you doing last month?上个月你一直在做什么?2.构成过去进行时由‘‘助动词be的过去式was／were+现在分词”构成。
如：The boy was cleaning the house.那个男孩正在打扫房子。
They were playing football at four yesterday afternoon.昨天下午四点他们在踢足球。
3.句式变化(1)一般疑问句及回答变成一般疑问句时应将was或were移到句首。
如：Was it raining at 6 0’clock this morning? 今天早上六点钟天正在下雨吗?Yes, it was.／No, it wasn’t.是的。
／不是。
Were they building a dam last winter? 去年冬天他们在建大坝吗?Yes, they were.／No, they weren’t. 是的，他们在建。
／不，他们没有。
(2)否定句肯定句变成否定句时在was／were后加not，was not常缩写为wasn’t，were not常缩写为weren’t。
如：My brother was not／wasn’t playing computer game last night.昨天晚上我弟弟不在玩电脑游戏。
We were not／weren’t shopping at th is time yesterday.昨天这个时候我们不在购物。
4.用法(1)表示过去某一时刻正在进行的动作。
动作发生的特定时间常用一个时间短语或时间状语从句来表明。
牛津译林版八年级英语上册Unit 8 Natural disastersGrammar备课时间：上课时间：_________ 主备：审核：备课组姓名：__________【点拨•导学】Ⅰ学习目标: 1. 掌握过去进行时含义及其肯定句、否定句和疑问句的构成。
2．灵活运用when, while引导的状语从句。
Ⅱ重难点：terrible, break, snowball, snowman, hit, discuss…with…search the Internet , plan a trip to Tangshan, on the side of the roaddrive you to school , as usual, break down【探究•研讨】Ⅰ回顾现在进行时：１. 含义：现在进行时指的是_____________________.2．基本构成形式是____________________________.e.g. 我正在读书。
I _______________ now.____________________________(否定句)____________________________(一般疑问句并做肯定回答)Ⅱ过去进行时：1. 含义：过去进行时指的是________________________.2. 基本构成形式是_______________________________.e.g. (1) 上个星期天的这个时候你在干什么？What _________ you ________ at this time last Sunday?(2) 今天早上8点到9点他们在上课。
They ______________ a class from 8 to 9 this morning.(3) 他们那个时候正在跑步。
They ______________ at that time.否定句:______________________________________一般疑问句及其肯定否定回答:____________________________________________________________________________Ⅲwhen和while 区别：When“当……时候”，后接延续性动词或非延续性动词；While “当……时”，后面只接延续性动词。
Grammar一、英汉互译。
1.寻找２．与某人讨论某事３．计划去某地去旅游４．一张．．的地图５．看指南书６．看报纸７．步行去．．．．８．看见某人做某事９．看见某人正做某事１０．在路的一边等待某人１２．开车送某人去上学１３．向往常一样１４．损坏，出毛病１５．是某人做某事的时间了１６．堆雪人１７．拍照片１８．跌倒二. 过去进行时的时间状语at this time yesterday, at that time, at nine yesterday morning, the whole afternoon, from 6:00 to 8:00 yesterday morning巩固练习1. What ________ your brother ________ (do) at nine o’clock last night?2. They ____________ (listen) to music at that time.3. When I saw him, he _____________ (search) the Internet.4. They ______________ (discuss) a problem in the meeting room at this time yesterday.5. ______ Amy ______ (visit) the Science Museum from 9:00 a.m. to 11:00 a.m. yesterday?三．句型转换。
1．He was doing his homework at eight last night.(改否定句)2.My brother is watching TV now.(用at four o’clock yesterday改写)3.My father was searching the Internet at that moment.4.He was writing a letter when I came in.5.Ididn’t know where I should go .(改为同义句)6.It is cloudy and a little windy today.四．课文句子理解.1.昨天下午三点那个学生在上网.The student ________ _______ _______ ________ at three yesterday afternoon.2.你进来时,我在给我的项目找几张1976年唐山地震的照片.I _______ ________ _________some ______ of the 1976 Tangshan earthquake for my project when you came in.3.那时Peter在他的的卧室里筹划去唐山的旅行Peter ________ ________a ______ _________ Tangshan in his bedroom at that time.4.昨天下午四点Danial正努力在网上找到一张唐山的地图.Danial ________ __________ ________ __________ a map of Tangshan on the Internet at four yesterday afternoon.5.昨天上午十点正在下大雨.It _______ __________ _________ at ten o’clock yesterday morning.。
2020人教版英语八年级下册Unit8重点词汇、语法自测（附答案）U8重点词汇、短语练习题一、单项选择1. I want to be a scientist like Tu Youyou when I ________ in the future. (海南)A. grow upB. wake upC. stay up2. Her smile made me feel warm and lively. It was like a hidden _______. (天津)A. competitionB. interviewC. treasureD. tradition3. —Thanks ________ our government, we can play sports on the new playground next week.—That's for sure! And we'll have a sports meeting ________ one month. (滨州)A. for; inB. to; inC. for; afterD. to; after4. Your garden is ________beautiful flowers.A. full ofB. full withC. filled ofD. fill with5. Your toys are here and there. Please______ , Linda. (来宾)A. put away themB. put them awayC. put them outD. put up them二、根据句意及提示补全单词1. Not everyone can live on the i alone like Robinson Crusoe.2. The man was so greedy that he died when he wanted to get more t .3. The play has become an American c .4. The next bus is d to arrive in five minutes.5. The full address is given on p 15.6. That man made a ________(记号)on one side of the boat.7. The boys are playing on the________ ( 沙滩).8. He pushed the plate ________(朝) me and offered me an apple.9. Finally, the plane _________ (着陆) safely at Beijing Capital International Airport.10. The computer is an important ______(工具) for us.11. The game has been downloaded ________(百万) of times.12. I have many hobbies, ________ ________(例如) swimming, rowing and hiking.13. He just came back from ________(国外).14. The Hong Kong-Zhuhai-Macao Bridge is considered as one of the “seven wonders of the __________(现代的) world”.15. When you get older, you'll ________ ________(逐渐) realize how much your parents have done for you.三、根据汉语意思完成句子1. 大象是陆地上最大的动物。
人教版八年级下册Unit 8 单元语法专练八(1022) 1.—M y c a r ye s te r d a y．Co u ld yo u p lea s e g ive me a r id e tomo r r o w?—I'm s o r r y I c a n't．I'm Da lia n to mo r r o w mo r n in g.（）A.b r e ak s d o wn; f lyin g a tB.ha s b r o ke n d o wn; f lyin g a tC.br o ke do wn; f lyin g toD.h a d b ro k en do wn; f lyin g to2.—Lo o k! M y mo th e r a n e w d r e s s f o r me．—Wo w，it loo k s ve r y n ic e o n yo u.（）A.is ma k in gB.ha s ma d eC.will ma k e3.I a n in vita tio n to th e c on c e r t．I c a n't wa it to go．（）A.re c e iveB.will r ec e iveC.wa s r e ce ivin gD.h a ve r ec e ive d4.Sa r a h ma n y p la c e s o f in te re s t in Be ijin g a lr ea d y．（）A.vis ite dB.ha s vis ite dC.will vis itD.vis its5.—W he n will yo u g ive th e no ve l b ac k to me?—So r r y,I it．H ow a b ou t Fr id a y?（）A.d id n't f in is hB.won't f in is hC.ha ve n't f in is h e dD.d o n't f in is h6.—W ha t do yo u th ink o f yo u r jun io r sc h ool lif e?—It so me s we e t me mo r ie s in my h e a r t in th e p a s t th r e e ye a r s.（）A.lea veB.le f tC.ha s le f tD.will lea ve s t ye a r o u r c las s se t up Re a d in g C o r ne r．S o f a r，we mo r e th an 200 b o ok s．（）A.we r e re a d in gB.ha ve r ea dC.will r ea d8.—W ha t do yo u th ink o f yo u r ho me to wn，Ka te？—It a lo t．It's mo r e be au tif u l th an b e fo r e．（）A.h a s c h an ge dB.ch an g e sC.will ch a ng eD.c h an g e9.J oe ha s a lre a d y f in is h e d r e ad in g th e b oo k．(改为否定句)J o e r e ad ing th e bo ok．10.I h a ve h e a rd o f th e in te r e s ting s to r y．(改为一般疑问句,并作肯定回答)—yo u o f th e in te r e s ting s to r y—, I ．11.Tim h a s ta k en a s ho we r．(改为一般疑问句,并作否定回答)—Tim a s howe r—, h e ．12.D a vid wa tc he d th e n e w TV p la y la s t n ig ht．(用a lr e ad y代替la s t n ig h t改写句子)D a vid th e ne w TV p la y．13.We h a ve co ll ec t ed lo t s of c l ot he s fo r th e c h ild re n in the p o o r a r ea．(对画线部分提问)h a ve yo u f o r th e ch ild r en in th e p oo r a r ea14.M y a u n t h a s live d i n S h a n gh ai f o r th r ee ye a r s．(对画线部分提问)yo u r au n t fo r th re e ye a r s15.—yo u(c lea n)the r oo m?—Ye s,we(do)that a lr e a d y．16.—Wh e n yo u(d o)yo u r ho me wo rk?—We(do)it an hou r a go．17.M y s is te r won't g o to t h e c in e ma with me b e ca u se s he(s ee) th e f ilm b e f o re．18.C ind y (b u y)th e b oo k la s t mo n th, a nd s he(r e ad)it twic e．19.—yo u(d ec id e)wh ic h to bu y？—N o, n o t ye t．20.I (n o t f in is h) do in g my h o me wo r k ye t．I'm a f r a id I h a ve tr o u b le f in is h in g it．21.—Th e d r a ma s e r ie s T he Th un d e r(《破冰行动》) h its sc r e en s th e s e d a ys．—O h, wh a t a p ity!I an y o f th e m ye t.（）A.d o es n't wa tc hB.d id n't wa tc hC.won't wa tc hD.h a ve n't wa tc h e d参考答案1.【答案】:C【解析】:句意：——我的车昨天抛锚了，你明天能载我一程吗？——对不起，我不能，我明天早上要坐飞机飞到大连。
7AU8Grammar---现在进行时(be doing)“时态”表示一个动词在不同的时间内发生的动作或存在的状态，需要用不同的动词形式表示。
在英语语法中，“时”指动作发生的时间，“态”指动作的样子和状态。
下面来学习现在进行时的用法。
一、现在进行时的基本用法：1.表示现在( 指说话人说话时) 正在发生的事情。
如：We are waiting for you.2.习惯进行：表示长期的或重复性的动作，说话时动作未必正在进行。
如：Mr. Green is writing another novel.(说话时并未在写，只处于写作的状态。
)She is learning piano under Mr. Smith.3. 表示渐变的动词有：get, grow, become, turn, run, go, begin等。
如：The leaves are turning red.It’s getting warmer and warmer.4.与always, constantly, forever 等词连用，表示反复发生的动作或持续存在的状态，往往带有说话人的主观感情色彩。
如：You are always changing your mind.1.)The boy ____always ____ us! (夸赞) (A)A. is; helpingB. does; helpC. can; helpD./;help2.)You ____ always _____ the same mistake!(责备)A. do; makeB. does; makeC. is; makingD. are; making (D)二、时间状语：now, at this time, these days, look, listen,等暗示动作正在发生，或有表示现在的上下文语境时. etc.•He is reading a book now. 他正在看书。
2020人教新目标九年级英语第八单元语法练习（有答案）单项选择( )1. ---Isn' t that Ann's husband over there?---No, it _______ be him ------I'm sure he doesn't wear glasses.A. can'tB. must notC. won'tD. may not( )2. You ______ be tired , you've only been working for an hour.A. must notB. won' tC. can' tD. may not( )3. He __________ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside. A. should B. must C. wouldn’t D. can’t( )4. --Do you know where David is? I couldn’t find him anywhere.—Well . He have gone far------ his coat’s still here.A．shouldn’t B．mustn’t C．can’t D．wouldn’t( )5. —Tom is never late for work. Why is he absent today? —Something________ to him. A．must happen B．should have happened C．could have happened D．must have happened( )6.—Did you ________ any gifts on your birthday?—Yes，but one of them was very expensive，so I didn't accept it.A．send B．receive C．refuse D．buy( )7.—Whose bike is it?—It ________ to me.It's hers.A．isn't belonged B．wasn't belongedC．didn't belong D．doesn't belong( )8.Not only my friends but also I ________ interested in football.A．be B．am C．is D．are( )9.—That T-shirt with Yao Ming's picture on it ________ be Tom's.He likes Yao Ming very much.—No，it ________ be his.He doesn't like blue at all.A．can；can't B．must；mustn'tC．may；needn't D．must；can't( )10.My parents often prevent me ________ computer games on school days. A．play B．to play C．to playing D．playing() 11.—I dreamt that I met ________ alien last night.—Then what did ________ alien do?A．an；the B．an；an C．the；the D．the；an( )12.—Does this book belong to ________ ?—No，it is ________.A．hers；my B．he；hers C．her；mine D．you；her( )13.—Janet is sleeping at home.—She ________ be.I went for a walk with her just now.A．can't B．mustn't C．needn't D．won't( )14.—________ books are these?—I'm not sure.They might be Jack's.A．Which B．Whose C．Who D．Whom( )15.—What's your favorite color，Linda?—I like ________ best.I have many things of that color.A．baseball B．geography C．license D．pink( )16.When she saw a piece of paper on the floor，she ________ and threw it into a basket.A．picked it up B．picked up it C．took it up D．took up it( )17.So many children are having fun in the park, ________ each other and laughing happily.A．running away B．running afterC．looking after D．taking after( )18.—Look！The cat is ________ the mouse.—Yes.It reminds me of Tom and Jerry.A．leaving for B．looking afterC．calling for D．running after( )19.—What happened to the students?—The heavy rain ________ them ________ getting to school on time. A．changed；into B．divided；intoC．prevented；from D．brought；from( )20. ________ the same time，the soldiers wanted to celebrate the victory________ the enemy.A．At；to B．With；for C．At；over D．As；over( )21.I'm very happy because ________ my parents ________ my best friend sends me gifts on my birthday.A．either；or B．neither；norC．both；and D．not only；but also( )22.—Do you come to Nanchang for the ________ of seeing your family or doing business?—I come here on business.A．interest B．price C．purpose D．thought( )23.You have just read the newspaper.Did you find ________ in it? A．valuable anything B．anything valuableC．valuable nothing D．nothing valuable( )24.—Doing more exercise can make us full of energy.— ________.It can also be good for studies.A．I don't think so B．I hope soC．I agree with you D．I' d love to( )25.—Gina，you look sad.________？—I failed my Chinese exam.A．Guess what B．What's wrongC．What about you D．What's next( )26. The river smells terrible. We must ________ people ________ dirty things into it.A.prevent；to throwB. prevent; throwC. prevent；throwingD. prevent；thrown( )27. —Why did Miss Wang look so worried?—Because she wondered ________.A. where did the other students goB. when would the policeman comeC. what her students have done during the tripD. if her students had survived the earthquake( )28. The journalist is ________ an old man in our neighborhood.A.interviewB. interviewedC. to interviewD. interviewing( )29. Beijing is a great placeA. visitB. to visitC. visitingD. visited( )30. The cleaners have to rubbish to keep our city clean.A. turn upB. pick upC. fix upD. give up( )31. There _________ be any difficulty about passing the road test since you have practiced a lot in the driving school. A. mustn’t B. shan’t C. shouldn’t D. needn’t( )32. I was on the highway when this car went past followed by a police car. They ____ at least 150 kilometers an hour.A.should have been doingB. must have been doingC. could have doneD. would have done( )33. This cake is very sweet. You __________ a lot of sugar in it.A．should put B．could have put C．might put D．must have put( )34. -- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.---- Oh, dear! She _______ a lot of difficulties!A. may go throughB. might go throughC. ought to have gone throughD. must have gone through( )35.---Is Jack on duty today? ---It _____be him. It’s his turn tomorrow.A. mustn’tB. won’tC. can’tD. needn’t( )36. —How’s your tour around the North Lake? Is it beautiful? —It ________ be, but it is now heavily polluted.A. willB. wouldC. shouldD. must( )37. —Guess what! I have got A for my term paper.—Great! You ______ read widely and put a lot of work into it.A. mustB. shouldC. must haveD. should have( )38. The teacher _______have thought Johnson was worth it or she wouldn't have wasted time on him, I suppose.A. shouldB. canC. wouldD. must( )39. —She looks very happy. She _____ have passed the exam.—I guess so. It’s not difficult after all.A. shouldB. couldC. mustD. might( )40. ---Listen！James is talking in the office.---It be James. He has gone to Canada.A.may notB. needn’tC. can’tD. mustn’t( )41. The baby is sleeping. Don’t make so much ________.A. soundB. voiceC. noiseD. smell( )42. This book isn’t ________. It’s ________.A. me；Jack’sB. mine；Jack’sC. mine；JackD. me；Jack ( )43. He turned around, but he couldn’t see ________.A. something unusualB. anything unusualC. unusual anythingD. unusualsomething( )44. —How interesting the picture is!—Yeah. There’s a cat ________ a dog.A. run afterB.to run afterC. running afterD. ran after ( )45. —Look! Peter is playing basketball on the playground.—It ________ be Peter. He has gone to London.A. can’tB. mustn’tC. mightD. may ( )46.The coffee tastes terrible.I don't think ________ likes drinking it.A．anything B．anybody C．nobody D．nothing( )47.Don't make so much ________，Jane.Your father is sleeping now. A．noise B．voice C．fun D．music( )48.—Look! Our math teacher ________ outside our classroom.—It can't be him.He has ________ to his office.A．stands；goes B．is standing；watC．stood；gone D．is standing；gone( )49.—You look so ________ now.Did you stay up last night? —Yes，I didn't go to bed until 12 o'clock.A．sleepy B．excited C．uneasy D．serious( )50.—Listen！There is a strange sound outside.—There might be something ________．A．happen B．happens C．happened D．happening答案1-5 ACBCD 6-10 BDBDD 11～15ACACA16～20 ABDCC21～25 DCBCB 26-30CDDBB31-35 CD DDC 36-40 CCDCC41-45CBBCA 46-50 BADAD。
八年级英语上册Unit8语法题专练及答案一、单项选择1. oranges do you want and orange would youlike?A. How many; how manyB. How much; how muchC. How many; how muchD. How much; how many2. Five were lost in the spacecraft accident.A. lifeB. livesC. lifesD. lives3. Uncle Wang bought two for me yesterday.A. breadB. milkC. dictionaryD. watches4. If you want to be a good football player like Messi, you need a lotof .A. practiceB. practicesC. playerD. play5. It is sunny. What weather!A. a goodB. an awfulC. greatD. bad6. He needs two and some bread.A. piece turkeysB. pieces turkeysC. piece of turkeysD. pieces of turkey7. I'm so hungry. Please give me to eat.A. three breadB. three pieces of breadC. three piece of breadD. three breads8. the TV, please. It's time for the weather report.A. Turn onB. Turn offC. Put downD. Put away9. the medical first, then make her comfortable and stay withher.A. GetB. GetsC. GettingD. To get10. when you cross streets.A. Being carefulB. Be carefulC. To be carefulD. Be carefully11. bananas and yogurt do you need for yourbanana milk shake?A. How many; how manyB. How many; how muchC. How much; how muchD. How much; how many12. Students these days often have lots of .A. worryB. worrysC. worriesD. worried13. But computers, space rockets and even electric seemedimpossible a hundred years ago.A. tooth-brushB. teeth-brushC. tooth-brushesD.teeth-brushes14. There are millions of websites(网站) on the Internet andthere a lot of useful(有用的) on the websites.A. are; informationsB. are; informationC. is; informationD. is; informations15. Swimming is in summer.A. a great funB. great funC. great funsD. great a fun16. Where is Mr. Zhang? I have to tell him.A. two newsB. two piece of newsC. two pieces of newsD. two pieces of new17. --- Good morning, madam. Can I help you?--- Sure, I'd like for cooking vegetables.A. two cups of coffeeB. three pieces of breadC. one bowl of dumplingsD. five kilos of oil18. I want to watch the basketball match. Would you please theTV?A. turn onB. turn offC. turn downD. turn up19. --- Can you tell me the way of making a banana milk shake?--- Yes. First, three bananas.A. peelB. peelingC. to peelD. peels20. --- Maria, the dog, will you?--- Why ask me? Tom is playing there.A. to feedB. feedC. feeding二、单词拼写(单句首字母填空)21. Sandra is p some water into the pot.22. They looked for the boy here and there, and f they found him in a corner.23. Dragon Boat Festival is one of the Chinese t festivals.24. We will have a party to c Kelly's birthday.25. Oil(油) and water can't m .26. We must study hard to s the people.27. Today's t is 7℃. You'd better put on warm clothes.28. --- What are people in China supposed to do when they meet for the first time? --- They are supposed to s hands.29. It's wasteful(浪费) to p milk into the dustbin.30. We looked for the little boy everywhere. F , we found him ina shop.31. Spring Festival is a t holiday in China.32. We are having a party to c my mother's birthday.33. Finally m all the ingredients up, then we can eat the food.34. In order to s more customers a day, many fast food restaurants paint the wall red.35. You have a fever. Let me take your t .三、单词拼写(根据中文提示拼写单词)36. Do you (庆祝) your birthday every year?37. In this way, small restaurants can also (招待) many people every day.38. In the northeast of China the (温度) stays below zero in winter.39. Then (倒) hot water into the blender.40. Now let's (混合) them up, then we can get a mixture.41. F (最后), he beat me in the tennis game.42. What is the (传统的) food on the Mid-Autumn Day(中秋节)?43. Businessmen usually (握) hands when they meet.44. Let's have a party to (庆祝) your birthday.45. All the guests have been (提供) with food and drinks.46. The weather report says the (温度) will drop to -5℃ tomorrow.47. The factory used to (倾倒) waster into the river.48. If you need more colours, you can get them by (混合) these colours together.49. (最后), we put the box on its side and got it out of the door.50. Dumplings are (传统的) Chinese food.答案一、单项选择1. C2. B3. D4. A5. C6. D7. B8. A9. A 10. B11. B 12. C 13. C 14. C 15. B16. C 17. D 18. A 19. A 20. B二、单词拼写(单句首字母填空)21. pouring22. finally23. traditional24. celebrate25. mix26. serve27. temperature28. shake29. pour30. Finally31. traditional32. celebrate33. mix34. serve35. temperature三、单词拼写(根据中文提示拼写单词)36. celebrate37. serve38. temperature39. pour40. mix41. Finally42. traditional43. shake44. celebrate45. served46. temperature47. pour48. mixing49. Finally50. traditional。
Unit 8 Natural disasters一、过去进行时1.定义过去进行时表示过去某一时刻正在进行的动作或过去某一段时问一直在进行的动作。
如：I was doing my homework at 8 P.m.1ast night. 昨晚8点我正在做家庭作业。
What were you doing last month?上个月你一直在做什么?2.构成过去进行时由‘‘助动词be的过去式was／were+现在分词”构成。
如：The boy was cleaning the house.那个男孩正在打扫房子。
They were playing football at four yesterday afternoon.昨天下午四点他们在踢足球。
3.句式变化(1)一般疑问句及回答变成一般疑问句时应将was或were移到句首。
如：Was it raining at 6 0’clock this morning? 今天早上六点钟天正在下雨吗?Yes, it was.／No, it wasn’t.是的。
／不是。
Were they building a dam last winter? 去年冬天他们在建大坝吗?Yes, they were.／No, they weren’t. 是的，他们在建。
／不，他们没有。
(2)否定句肯定句变成否定句时在was／were后加not，was not常缩写为wasn’t，were not常缩写为weren’t。
如：My brother was not／wasn’t playing computer game last night.昨天晚上我弟弟不在玩电脑游戏。
We were not／weren’t shopping at th is time yesterday.昨天这个时候我们不在购物。
4.用法(1)表示过去某一时刻正在进行的动作。
动作发生的特定时间常用一个时间短语或时间状语从句来表明。
牛津英语8A Unit8 Grammar 专项讲解一、定义过去进行时，是表示过去某个具体时刻正在进行的事情或动作。
二、结构was/were +doing (现在分词）2.1 过去进行时的构成肯定句：主语+ was/were + 现在分词...否定句：主语+ was/were + not + 现在分词...疑问句：Was/Were + 主语+ 现在分词...?疑问代词/疑问副词+ was/were + 主语+ 现在分词...?2.2 过去进行时的肯定句句型：主语+ was/were + 现在分词...过去进行时的构成方式：All the pupils were writing their homework in the classroom then.那时，所有的小学生都在教室里写作业。
By the time we got there，it was already getting dark.等我们赶到那里时，天已经黑下来了。
2.3 过去进行时的否定句句型：主语+ was/were + not + 现在分词...过去进行时的否定句是在助动词was/were后加not，后接现在分词：They were not playing basketball，but playing volleyball.他们不是在打篮球，而是打排球。
2.4 过去进行时的一般疑问句句型：Was/Were + 主语+ 现在分词...?回答方式：Yes，主语+ was/were...No，主语+ was/were + not...过去进行时的一般疑问句是将助动词was/were置于主语之前（大写was/were的第一个字母），在句尾加问号；这种语序是主语和谓语倒装语序：Were you having dinner when they came? —Yes，we were./No，we weren't.他们来的时候，你们是否在吃饭? ——是的，在吃饭。
