人教版新目标英语八年级下册知识点全归纳

1、。 八年级（下）英语知识讲解八年级（下）英语知识讲解（人教） 目录 1 Unit 1 Will people have robots? 2Unit 2 What should I do? 3Unit3 What were you doing when the UFO arrived? 4Unit 4 He said I was hard-working. 5Unit 5 If you go to the party, youll have a great time! 6Review of units 1-3 7Review of units 4-5 8八年级下学期期中复习（一） 9改错小练 1

2、0八年级下学期期中复习（二） 11八年级期中考试模拟题 12Unit 6 How long have you been collecting shells? 13 Unit 7Would you mind turning down the music? 14 Unit 8 Why dont you get her a scarf? 15Unit 9 Have you ever been to an amusement park? 16 Unit 10 Its a nice day, isnt it? 17介词复习 18 Review of units 6-8 19 Review of unit

3、s 9-10 20八年级第二学期期末复习题 21八年级第二学期期末模拟试题 22 How do you study for a test 23 Unit2 I used to be afraid of the dark Unit 1Unit 1 Will people have robots?Will people have robots? II. Grammar:II. Grammar: 一般将来时 there will befew，a few，little，a little，much，many 语法小结：语法小结： 一、一般将来时一、一般将来时 1用be doing 表示将来：主要意义是表

4、示按计划、安排即将发生的动作，常用于位置转移的动词。 如：go，come，leave，arrive 等，也可用于其他动作动词。 We are having fish for dinner. We are moving to a different hotel the day after tomorrow. 这种用法通常带有表示将来的时间状语，如果不带时间状语，则根据上下文可表示最近即将发 生的动作。 A: Where are you going? B: I am going for a walk. Are you coming with me? A: Yes，I am just coming.

5、 Wait for me. 2用 be going to do表示将来：主要意义，一是表示“意图”，即打算在最近的将来或将来进行某 事。 Are you going to post that letter? How long is he going to stay here? -可编辑修改- 。 I am going to book a ticket. 另一意义是表示“预见”，即现在已有迹象表明将要发生或即将发生某种情况。 Its going to rain. George is putting on weight; he is going to be quite fat. 3. 用 will

6、/ shall do 表示将来： 主要意义，一是表示预见。 You will feel better after taking this medicine. Do you think it will rain? 二是表示意图. I will not lend the book to you. Take it easy，I will not do it any longer. 基本结构： She will come to have class tomorrow. Will she come to have class tomorrow? She wont come to have class t

7、omorrow. What will she do tomorrow? 二、二、There beThere be 结构结构 1. therebe结构中的 be 是可以运用各种时态的。 There is going to be a meeting tonight.今晚有个会议。 There was a knock at the door.有人敲门。 There has been a girl waiting for you.有个女孩一直在等你。 There will be rain soon.不久天就要下雨了。 2. 动词 be 单复数形式要跟 there be 之后的真正的主语一致。并且要根据

8、就近一致原则来变换be 的单复数形式。 如 There is a book on the desk.课桌上有一本书。 How many people are there in the city?这个城市里有多少人口？ There is a pen and two books on the desk.课桌上有一个钢笔和两本书。 There are two books and a pen on the desk.课桌上有两本书和一个钢笔。 There are some students and a teacher in the classroom.教室里有一些学生和一位老师。 There is a

9、 teacher and some students in the classroom. 教室里有一位老师和一些学生。 3. 在 therebe 引起的句子结构中，用来修饰主语的不定式主动形式和被动形式均可。 There is no time to lose (=to be lost). 时间紧迫。 There is nothing to see (=to be seen). 看不见有什么。 There is nothing to do. (=to be done)无事可做。 4、There is no doing. (口语)不可能. There is no telling when he w

10、ill be back.无法知道他什么时候回来。 There is no knowing what he is doing.无法知道他在做什么。 三、课文难句解析三、课文难句解析 1. Will people use money in 100years?一百年后人们还会使用钱币吗？ 1) money 金钱；货币 eg Whats the money?价钱是多少? paper money 纸币；钞票 2) in 100 years 在 100 年之后 “in+一段时间”常用在将来时态中 eg Ill come in an hour.我一小时后来。 Ill see you again in thr

11、ee days. 三天后我再见你。 2. There will be less leisure time空闲时间会更少。 1) less形容词：较少的(是 little 的比较级)，修饰不可数名词，其最高级是least；反义词是 more。 eg Janes less beautiful than Mary.简不如玛丽漂亮。 Five is less than six 5 比 6 少。 2) leisure time空闲时间 -可编辑修改- 。 egWhat do you do in your leisure time?你空闲时间做些什么？ 3. I think there will be m

12、ore pollution我认为将会有更多的污染产生。 1) think后跟的是宾语从句，且宾语从句是there be句型的一般将来时，结构为“there will be+ 物+其他成分”。 eg I think it will rain tomorrow.我认为明天会下雨。 I think there will be fewer trees. 我认为将来树木会更少。 2) pollution 表示“污染”，用作不可数名词。 例如：They did a lot to stop water pollution他们采取大量措施制止水污染。 4. I dont agree 我不同意。 agree 在

13、本句中作动词，I dont agree是一句交际用语，表示“不赞成某人或某人的观点”， 如果表赞成，则为 I agree。 1) 表示“同意某人意见”时用 agree with sb，该短语不能用于被动语态。 eg Did you agree with him?你同意他的意见吗? I dont agree with what she said 我不同意她所说的。 2) 表示“同意(某计划、办法、建议、条件)”时，用 agree to(to 在此用作介词，其后接名词、代 词或者相当于名词的成分)，该短语可以用于被动语态。 egI agree to your idea我同意你的想法。 My pla

14、n was agreed to by all of them 他们所有的人都同意我的计划。 3) 表示“就取得一致意见”用 agree on(或 upon)，指“两者或两者以上的商定，达成协议”。 egThey both agreed on the date for the meeting他们双方都同意开会的日期。 4) agree 后还可以接不定式，不接动名词，表示“同意做某事”。 egThey agreed to leave tomorrow afternoon他们同意明天下午动身。 5. What do you think Sally will be in five years? 你认为

15、萨莉 5 年之后将会是什么样子? 此句中的 do you think 是插入语，其后接的宾语从句必须用陈述句语序。 eg Which book do you think she will like?你认为她会喜欢哪本书? Who do you think did it?你认为是谁干的那件事? 6. I went to Shanghai last year and fell in love with it.我去年去了上海，并且喜欢上了 这座城市。 1) go 表示“去”，过去式是 went，“go to+地名”表示“到某地去”。 egWhen will you go to school?你什么时

16、候去上学？ He will go to the factory tomorrow他明天要去那所工厂。 如果 go 后面接副词，不用 to。 egHe went home at before six yesterday evening他昨天晚上 6 点前回家的。 2) last year 意为“去年”，用于一般过去时态中。 egHe went to London last year去年他去了伦敦。 3) love 爱，热爱，其反义词是hate；fall in love with是“喜爱；爱上；与相恋”的意思。 egHe went to Harbin last year and fell in l

17、ove with it. 去年他去了哈尔滨，并且喜欢 上了那里。 7. I cant have any pets because my mother hates them. 我不能养宠物，因为我妈不喜欢他 们 1) because 在这句中用作连词，引导原因状语从句，表示“因为”。注意在英语中 because 不能和 so 同时使用。 egJohn didnt go to school because he was ill. 约翰没有上学，因为他病了。 2) hate 表示“不喜欢，憎恨”，后可跟名词或代词作宾语，也可用词组hate doing sth.，表示“讨 厌做某事”。 egHe ha

18、ted flowers.他讨厌花朵。 I hate swimming in the lake.我讨厌在那个湖里游泳。 8. Ill probably go skating and swimming every day. 我会每天都去滑冰和游泳。 1) go doing sth. 结构，表示“去做 go skating去滑冰go swimming去游泳 go shopping去买东西 go fishing 去钓鱼 go boating去划船 egMy father goes fishing every week 我爸爸每周都去钓鱼。 I like going skating我喜欢去滑冰。 -可编

19、辑修改- 。 2) every day与 everyday 区别：every day 表示“每天”，通常与一般现在时连用；而everyday 表 示“日常的，每天发生的，每日所用的”，是形容词。例如： egI get up at six every day.我每天 6 点起床。 He wears everyday clothes today今天他穿一身便服。 9. During the week Ill look smart，and probably will wear a suit 在工作日里，我会看上去很精神，也许会穿一身套装。 1) during 表示“在期间”，during the w

20、eek是介词短语，意为“在工作日里”。 egThe sun gives us light during the day. 太阳在白天给我们阳光。 He fell asleep during the lesson. 他在上课时睡着了。 2) look 表示“看上去”，用作连系动词，其后接形容词作表语。 egThat dog looks dangerous. 那只狗看起来很危险。 You look very beautiful today. 今天你看上去很漂亮。 3) wear 表示“穿”，表示状态，用一般现在时表示经常状态，用现在进行时表示暂时状态。 egWe wear our rain boo

21、ts on a rainy day.我们在下雨天穿雨鞋。 She is wearing a new coat她穿着一件新衣服。 Does he wear glasses?她戴眼镜吗？ put on 是“穿上”，“戴上”的意思，强调动作。 egShe put on a red coat and went out.她穿上红色大衣出去了。 注意：put on 是一时的动作，不能跟表示一段时间的状语连用。 他整天戴着草帽。 误：He puts on a hat all day. 正：He wears a hat all day. 10. Ill go to Hong Kong on vacation我

22、会去香港度假。 on vacation 意为“在度假”，on 表示“处于状态中”。 eg He will go to Hangzhou on vacation他要到杭州度假。 My father will be away on business tomorrow我爸爸明天要出差。 11. What do you think the weather will be like tomorrow?你认为明天的天气怎样? 1) Whats the weather like? 是询问天气怎么样，相当于How is the weather？What be like? 可以用来征求对方对某事的看法或意见，

23、意思是“怎么样?” 类似的说法还有 What do you think of? How do you like?等句型。 egWhat is the book like? What do you think of the book? How do you like the book?你觉得这本书怎么样? Whats the weather like today?How is the weather today? 今天天气怎么样? 2) What isare1ike? 可用来提问天气情况，也可用来对人(或物)的外观、外貌提问，还可以 用来对其特性提问。 egWhats the weather l

24、ike today? 今天天气怎么样? Whats the young girl like?那个年轻女孩长什么样? What was the book like?那本书怎么样? 12. There were many famous predictions that never came true (过去)有许多从没成为现实。 著名的预测 1) 本句中 that never came true是个定语从句，用于修饰先行词predictions，that 为引导词， 作定语从句的主语，不可省略。 2) come true 指“理想，梦想等实现”。come 是连系动词；true 是形容词，做连系动词

25、come 的表语。 egMy dream will come true someday. 有一天我的梦想会实现。 Her dream to go to university has come true 她上大学的愿望实现了。 Unit 2Unit 2What should I do?What should I do? 【单元目标】【单元目标】 2 2目标句型：目标句型： 1. What should I do? 2. Why dont you? 3. You could 4. You should 5. You shouldnt -可编辑修改- 。 3 3语法语法 情态动词的用法 【重难点分析

26、】【重难点分析】 情态动词情态动词(Modal Verbs )(Modal Verbs ) * 情态动词也可称为“情态助动词 (Modal Auxiliaries)”，因为它和基本助动词(be,do, have)都 属于助动词类。 * 情态动词和其他动词连用，可表示说话人的语气。 * 情态动词可表达建议、要求、可能和意愿等。 * 情态动词没有人称和数的变化。 * 常用的情态动词有：can, could, may, might, must, shall, should, will, would 这九大情态 动词；其他的还有 ought to, need, dare 等。 一、九大情态动词的时态关

27、系：一、九大情态动词的时态关系： 1. 现在式 can - 过去式 could 2. 现在式 may - 过去式 might 3. 现在式 shall - 过去式 should 4. 现在式 will - 过去式 would 5. 现在式 must - 过去式 must （常用 had to 来代替） 二、情态动词表示二、情态动词表示“ “可能可能” ”或或“ “预测预测” ” (can, could, will, would, shall, should, must, ought to) （1 1）cancan 和和 could could 用于表示用于表示“ “可能可能” ”或或“ “预测

28、预测” ”： 1. He cant be at home. (否定句) 他不可能在家。 2. Can the news be true? (将情态动词 can 置于主语 the news 前就成疑问句) 这消息可能是真的吗? 3. Anybody can make mistake. (只表示理论上的可能性)任何人都可能犯错误。 （2 2）maymay 和和 might might 用于表示用于表示“ “事实上的可能性事实上的可能性” ”或或“ “预测预测” ”： 1. It may rain tomorrow. (表示可能会发生)明天可能会下雨。 2. It may snow later th

29、is afternoon. (表示预测)今天下午可能会下雪。 -可编辑修改- 。 3. You might be right. (表示有可能)你可能是对的。 （3 3）willwill 和和 would would 用于表示用于表示“ “预测预测” ”或或“ “习惯性习惯性” ”： 1. I think he will be all right now. (will be 表示一定会)我想他现在一定好了。 2. That would be his mother.(would be 表示肯定是) 那肯定是他母亲。 3. He will sit there hour after hour look

30、ing at the river.(will 表示经常的) 他经常一连几个小时坐在那儿看着河水。 （4 4）shallshall 和和 should should 用于表示用于表示“ “必定必定” ”： 1. I shall be rich one day. (shall be ) 总有一天我会发达的。 2. That should be Sam and his mother. (should be)那准是 Sam 和他的母亲。 （5 5）mustmust 用于表示用于表示“ “必定必定” ”，“ “必会必会” ”： 1. This must be good for you.(must be

31、肯定)这肯定对你是有益的。 2. All mankind must die.(表示必然会发生的事)所有的人一定会死的。 3. Mustnt there be a mistake? (mustnt 多用于疑问句)那肯定会有错误吗？ 三、情态动词表示三、情态动词表示“ “许可许可” ”、“ “请求请求” ” (can, could, will, would, shall, should, may, might, must) （1 1）cancan 和和 could could 用于表示用于表示“ “许可许可” ”、“ “请求请求” ”： 1. Can I go with you? (请求)我能跟你

32、一起走吗？ 2. Father said I could go to cinema. (表示过去的许可)爸爸说我可以去看电影。 3. Could I ask you something ? (请求,用 could 比 can 更婉转) 我可以问你一件事吗？ （2 2）willwill 和和 would would 用于表示用于表示“ “请求请求” ” 1. Will you kindly tell me the way to the post office?(表示客气请求) 请问到邮局怎么走？ 2. Would you give me your address? (用 would 比 will

33、 表示更客气) 请你告诉我你的地址，好吗？ （3 3）shallshall 和和 should should 用于第一人称，表示征求对方的意见用于第一人称，表示征求对方的意见 1. Shall we talk?我们谈谈好吗？ 2. What should we do next? (用 should 比 shall 表示更客气)下一步我们该怎么做？ -可编辑修改- 。 3. Shall he come to see you? (用于第三人称疑问句)要不要他来看你？ （4 4）maymay 和和 might might 用于表示用于表示“ “许可许可” ”( (口语中多用口语中多用 can ) c

34、an ) 1. You may take a walk. (表示给予许可)你可以散散步。 2. You might read the story for me. (比 may 更婉转)是否请给我读一读这故事。 3.May I make a suggestion?我可以提个建议吗？ 4. Might I take a look of your work?我看看您的大作行吗？ 5. Students may not make noise in the library. (may not 表示不许可或禁止) 学生不得在图书馆里吵闹。 6. If I may say so, you are not r

35、ight. (用于条件句，表示请求) 你是不对的，如果我可以这么说的话。 （5 5）mustmust 用于表示用于表示“ “禁止禁止” ”，“ “不准不准” ”： 1. Cars must not be parked here. (must not表示不许可)此地不准停车。 2. All of you mustnt fishing in the pool. (must not 语气方面比 may not 更强) 你们不准在池里钓鱼。 四、重要短语和表达法四、重要短语和表达法(Key Words)(Key Words) 1 1argue vargue v争论；争吵争论；争吵 argue with

36、 sb与某人吵架 I argued with my best friend我和我的好朋友吵架了。 Dont argue with him.别和他争吵了。 2 2 either either adv. adv.（用于否定句）也（用于否定句）也 He doesnt have any money, and I dont, either他没有钱，我也没有。 I cant play chess. She cant, either.我不会下国际象棋，她也不会。 too 也（用于肯定或疑问句） Im a teacherHe is a teacher, too我是老师，他也是老师。 We are going

37、hiking. Are they going hiking,too?我们要去徒步旅行,他们也要去吗？ 3 3askask （sbsb）for sthfor sth向某人寻求某物；要向某人寻求某物；要 Dont ask for food every dayGo and find some work 别天天要饭，找点儿工作做。 I dont think you should ask your parents for some money.我想你不应向父母要钱。 If you have any problems, you can ask the policeman for help. 如果你有困难，

38、可以向警察 求助。 He didnt want to ask his teacher for his book back 他不想向老师要回他的书了。 4 4the same as.the same as. 与与相同相同 The clothes are the same as my friends这些衣服与我朋友的一样。 Tom is the same age as Anna Tom is as old as Anna汤姆和安娜一样大。 -可编辑修改- 。 Her backpack is the same as mine.她的背包与我的一样。 5 5exceptexcept 除除以外；（不包括以

39、外；（不包括在内）在内） My class has been invited except me Only I havent been invited 除我以外，我的同学都被邀请了。 All the students went to the park except him Only he didnt get to the park They all toured America except her. 除了他以外，所有的学生都去美国旅行过。 besidesbesides 除除以外（包括在内）以外（包括在内） We all went there besides him He went there

40、We went there, too除他去以外，我们也 都去了。 There are five more visitors besides me.除了我之外还有 5 倍访客 6 6wrong adjwrong adj错误的；有毛病的；不合适的错误的；有毛病的；不合适的 Is there anything wrong with you?你哪儿不舒服？ Whats wrong with you? 你怎么了?(你哪里不舒服?) Ive got a headache我头痛。 Whats wrong with your watch? It doesnt work.你的手表怎么了？它不走了。 adv错误地

41、；不正确地；不对地 He answered wrong他答错了。 They knew they did wrong.他们知道他们做错了。 7 7get on well with sbget on well with sb与某人相处融洽与某人相处融洽 The students will get on well with the teacher学生会和老师相处得非常好。 We get on well with each other我们彼此相处融洽。 Can she get on well with all the other students in her class? 她能与她班里所有的同学相处

42、得好吗? 8 8have a fight with sbhave a fight with sb fight with sb fight with sb与某人打架与某人打架 I dont want to have a fight with my cousin 我不想和我的堂兄打架。 They never fight with each other.They are really good friends. 他们从不打架，他们的确是好朋友。 五、主要句型五、主要句型(Key Sentences Structures)(Key Sentences Structures) What should I

43、 do? You could write him a letter What should he do? Maybe he should say sorry to him What should they do? They shouldnt argue 六、词语辨析六、词语辨析 1. borrow sth. from sb.从某人处借进某物 lend sth. to sb.把某物借给某人 borrow sth. from sb.是指该句的主语从别人处(往里)借进某物 例:He borrowed the dictionary from Lucy yesterday. 他昨天从露西处借了那本字典.

44、 lend sth. to sb. = lend sb. sth. 是指该句的主语把某物（往外）借给别人用 例如：Could you lend me your car?请你借给我你的车用一下好吗？ 2. get sb. to do使做（以人为对象时，有“说服使做”的含义） He could get a tutor to come to his home. 他可以请一位家庭教师来他家。 -可编辑修改- 。 Youll never get her to agree.你决不可能使她同意。 ask sb. to do邀请（人）做 We asked her to come to our party.我们

45、请她来参加聚会 tell sb. to do让某人做某事例如： The teacher told him to finish the work that day. 老师那天让他完成那项工作。 3、be in style时髦的，流行的 be out of style过时的，不时髦的 例： Look! Her new dress is in style.她的新裙子很时髦。 Those clothes are out of style.那些衣服过时了。 七、课文解释七、课文解释 1 1、I donI dont want to surprise him.t want to surprise him.

46、我不想让他感到意外。我不想让他感到意外。 此处 surprise 是及物动词 surprise sb. 使某人感到吃惊 eg. My friend always surprises me. 2 2、talk about it on the phonetalk about it on the phone用电话就此事进行交流用电话就此事进行交流 eg. Call Jim on the phone.找吉姆听电话。 Lily, you are wanted on the phone.莉莉，你的电话 3 3、call sb. (up) =give sb. a callcall sb. (up) =giv

47、e sb. a call给某人打电话给某人打电话 He called me (up) from New York.他从纽约给我打来电话 =He gave me a call from New York. 4 4、write sb. a letter = write a letter to sb.write sb. a letter = write a letter to sb.给某人写信给某人写信 5 5、give him a ticket to a ball game.give him a ticket to a ball game.给他一张观看球赛的入场券给他一张观看球赛的入场券 eg.

48、They got two tickets to tonights show.他们搞了两张今晚表演的入场券。 6 6、She has the same haircut as I do.She has the same haircut as I do.她和我有相同的发型。她和我有相同的发型。 eg. Tim has the same clothes as his brother does.提姆和他的弟弟有相同的衣服。 7 7、find outfind out （研究、努力的结果）发现，查出，找出（研究、努力的结果）发现，查出，找出 You should find out (the answer)

49、for yourself.你应该自己去找答案。 8 8、Everyone else in my class was invited except me.Everyone else in my class was invited except me. 除了我以外，我们班其他别的人都接到了邀请（信） 此句中 else 一词不能单独使用它必须跟在不定代词像“someone, anyone nobody”等词的后面，或 跟在特殊疑问词像“what, where”等词的后面使用意思是“别的” eg. What else do you know about it? 关于此事你还知道什么别的方面 9 9、I

50、 canI cant think what I did wrong.t think what I did wrong.我真想不出我做错了什么。我真想不出我做错了什么。 此句中 what I did wrong 是宾语从句，作 think 的宾语应用陈述语序。 1010、I Im very upset and donm very upset and dont know what to do.t know what to do.我很沮丧，不知该干什么。我很沮丧，不知该干什么。 此句中 what to do 是不定式作 know 的宾语，可用宾语从句来代替。可以说成“I dont know what

51、 I should do.” 1111、There are a lot of things you could do.There are a lot of things you could do. 有许多你能做的事。有许多你能做的事。 此句中 you could do 是定语从句，修饰前面的名词“things” 1212、You left your homework at home.You left your homework at home.你把你的作业落在家里了。你把你的作业落在家里了。 Leave sth. +介词短语，是“把忘在，落在（某处）的意思。 eg. He left his u

52、mbrella on the bus.他把伞忘在公交车上。 1313、You should try to be funny.You should try to be funny.你应该试着幽默一些。你应该试着幽默一些。 -可编辑修改- 。 Try to do努力做，试着做，尽量做 而 try not to do是尽量不做 eg. Please try not to be late again.请尽量不要再迟到。 1414、Their school days are busy enough.Their school days are busy enough.他们的学校生活是够忙的。他们的学校生活

53、是够忙的。 enough 必须放在形容词/副词的后面,表示“足够的” eg. He is tall enough to reach that apple. 他足够高的可以够着那个苹果。 1515、be under too much pressure.be under too much pressure.在太多的压力下在太多的压力下 1616、see other children doing a lot of thingssee other children doing a lot of things看别的孩子在做许多事看别的孩子在做许多事 see sb. doing看见某人正在干某事 eg.

54、We saw them playing basketball at that time.那时我们看见他们在打篮球 1717、find it hard to do sth.find it hard to do sth.发现做发现做（事）很难（事）很难 He found it hard to learn math well.他发现学好数学很难 Unit 3Unit 3 What were you doing when the UFO arrived? What were you doing when the UFO arrived? 【单元目标】【单元目标】 2 2目标句型：目标句型： 1. Wh

55、at were you doing when.? 2. I was doing sth. when. 3. How about. / What about.? 4. What happened next? 5. While sth./sb. was doing sth., I did. 3 3语法语法 1. 过去进行时 2. 情态动词的用法 【重难点分析】【重难点分析】 一一. . 过去进行时过去进行时 过去进行时表示过去某一时刻或者某段时间正在进行或发生的动作，常和表过去的时间状语连用， 如： I was doing my homework at this time yesterday.昨天

56、的这个时候我正在做作业。 They were waiting for you yesterday.他们昨天一直在等你。 过去进行时的构成： 肯定形式：主语+was/were+V-ing 否定形式：主语+was not (wasnt)/were not (werent)+V-ing 疑问形式：Was/Were+主语+V-ing。 基本用法： 1.过去进行时表示过去某一段时间或某一时刻正在进行的动作。 常与之连用的时间状语有， at that time/moment, (at) this time yesterday (last night/Sunday/week), at+点钟+yesterda

57、y (last night / Sunday)，when sb. did sth等时间状语从句，如： What were you doing at 7p.m. yesterday? 昨天晚上七点你在干什么？ I first met Mary three years ago. She was working at a radio shop at the time. 我第一次 遇到玛丽是在三年前，当时她在一家无线电商店工作。 I was cooking when she knocked at the door. 她敲门时我正在做饭。 2. when 后通常用表示暂短性动词， while 后通常用表

58、示持续性动词， 因此它所引导的状语从句中， 谓语动词常用进行时态，如： When the car exploded I was walking past it.= While I was walking past the car it exploded. 3.when 用作并列连词时，主句常用进行时态，从句则用一般过去时，表示主句动作发生的过程中， 另一个意想不到的动作发生了。如： I was walking in the street when someone called me. 我正在街上走时突然有人喊我。 -可编辑修改- 。 4. when 作并列连词，表示“（这时）突然”之意时，第一

59、个并列分句用过去进行时，when 引导的 并列分句用一般过去时。如： I was taking a walk when I met him. 我正在散步，突然遇见了他。 We were playing outside when it began to rain. 我们正在外边玩，这时下起雨来了。 二二. . 情态动词情态动词(Modal Verbs )(Modal Verbs ) 4 4、情态动词表示、情态动词表示“ “应该应该” ”、“ “必须必须” ”（shall, should, may, might, must, ought to） （1 1）shallshall 和和 should should 用于表示用于表示“ “必须必须” ”： . Each member shall wear a name card. (表示规定)每一个会员必须配带名卡。 . I should answer his letter as