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初中必备英语动词的时态技巧全解及练习题(含答案)一、初中英语动词的时态1．It’s nice to see you again. We ______ each other for a long time.A．didn’t see B．haven’t seen C．won’t see D．didn’t see【答案】B【解析】【详解】句意：再次见到你很开心，我们已经好长时间没见了。
本题考查的是时态，结合语境，此处指到现在为止有好久没有见面了，根据所给空后面的for a long time是现在完成时的标志词可知，应该用现在完成时，故答案选B。
2．—Shall we play tennis now?—Sorry, I can’t. I my homework.A．do B．did C．have done D．am doing【答案】D【解析】句意：——我们现在打网球去好吗？——对不起，我不能去，我在做作业。
A. do 做，用于一般现在时态，主语复数时； B. did做，用于一般过去时态； C. have done 做，用于一般现在完成时态； D. am doing做，用于现在进行时态，主语是I时；根据now可知用现在进行时态，故选D3．— Did you sleep well last night?—Far from that! One of my neighbours ▲ music pretty loud.A．plays B．was playing C．is playing D．would play【答案】B【解析】句意：-----你昨晚睡得好吗？------远非如此！我的一个邻居在大声演奏音乐。
A. plays一般现在时态；B. was playing 过去进行时态；C. is playing 现在进行时态； D. would play过去将来时态。
结合语境可知，昨晚睡不好觉的原因是当时有人在演奏音乐，故用过去进行时态来描述，答案为B。
时态的基本判定方式：一、时间状语同时态的关系：一般情况下，简单句可根据句中的时间状语确定谓语动词的时态。
其判定方式如下：1、句中含有yesterday; last year（last + 具体时间）; two days ago（一段时间+ ago）; just now; this morning; in 2008（in + 过去的年代）; the other day; over the weekend 等时间状语时，谓语动词用一般过去时；2、句中含有tomorrow; next week（next +具体时间）; in two hours（in +一段时间）; (how) soon; from now on; 10 years from now（一段时间+from now）; in the future; in 2012（in +将来的年代）; by (the end of) next month（by+将来时间）; for the weekend; this afternoon; this evening; tonight; this weekend等时间状语时，谓语动词用一般将来时；3、句中既有yesterday等过去时间状语，又有一个具体时间点（at 5:00; this time; at that time）时，谓语动词用过去进行时；4、句中含有recently; in the last/past two years（in the last/past+一段时间）; over the years（over the+一段时间）; since 2005（since+具体时间或从句）; for two years （for+一段时间，句中无其它时间状语）; before（单独用于句尾）等时间状语时，谓语动词用现在完成时；5、by (the end of) last year（by+过去时间）; two days before（一段时间+before）; for和since说明的时间同时用于句中;by the time + 从句（过去时态）等时间状语时，谓语动词用过去完成时；6、简单句中如不含上述时间状语或有含说话时间在内的表示现在时间关系的词语时（如now; today; these days等词），其时态的判定一般按以下步骤进行：------ 句中是否含有表示频率关系的词。
初中英语动词的时态答题技巧及练习题(含答案)含解析一、初中英语动词的时态1．---Have you ever been to Harbin?---Yes. I ________ there when I was twelve for the Ice and Snow Festival.A．have goon B．have been C．went D．had been【答案】C【解析】【详解】句意：——你曾经去过哈尔滨吗？——是的，当我十二岁的时候去了冰雪节。
这里是when 引导的时间状语从句，主语用一般过去时态，这里用go的过去式went。
根据题意，故选C。
2．—Could you tell me what he said just now?—Sorry, I ___ about what I would do tomorrow.A．will think B．was thinking C．thought D．think【答案】B【解析】【详解】句意：你能告诉我他刚才说什么吗？对不起，我正考虑明天我要做什么。
考查时态。
A. will think（一般将来时）；B. was thinking（过去进行时）；C. thought （一般过去式）；D. think（一般现在时）；根据句意，“考虑”这个动作发生刚才在他讲话的时候，在过去某个时间点发生的动作用过去进行时，故选B。
3．___ you ____ my watch? Yes, I ____ it on the table just now.A．Did , see , saw B．Did , see , see C．Have , seen, saw. D．Have , seen, have seen【答案】C【解析】句意：——你看见我的手表了吗？——是的，我刚才在桌子上看到了。
第一个空根据答语中的Yes, I ____ it on the table just now.可知事情已经发生了，强调对现在造成的影响，所以问句应用现在完成时，结构为：have/has+动词过去分词，主语是you，所以用have，see的过去分词是seen；第二个空根据时间状语just now“刚才”，它是表示过去的时间状语，是一般过去时的标志词，可以判断答语应用一般过去时，即谓语动词see要用其过去式saw；结合选项，可知C选项符合题意，故答案选C。
初中英语八大时态用法详解及真题巩固练习一般现在时1. 概念：经常、反复发生的动作或行为及现在的某种状况。
2. 基本结构：①is/am/are；②do/does否定形式：①am/is/are + not ; ②此时态的谓语动词若为行为动词，则在其前加don't,如主语为第三人称单数，则用doesn't，同时还原行为动词。
3. 一般疑问句：①把 is/am/are 动词放于句首；②用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。
4. 用法：1) 经常性或习惯性的动作，常与表示频度的时间状语连用。
例如：I leave home for school at 7 every morning. 每天早上我七点离开家。
2) 客观真理，客观存在，科学事实。
例如：The earth moves around the sun. 地球绕太阳转动。
Shanghai lies in the east of China. 上海位于中国东部。
3) 表示格言或警句。
例如：Pride goes before a fall. 骄者必败。
注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。
例如：I knew that the earth goes around the sun when I was little.我小时候就知道地球绕太阳转。
4) 现在时刻的状态、能力、性格、个性。
例如：I don't want so much. 我不要那么多。
Ann writes good English but does not speak well.安英语写得不错，讲的可不行。
5) 一般现在时表示将来含义a. 下列动词 come, go, arrive, leave, start, begin, return 的一般现在时可以表示将来，主要用来表示在时间上已确定或安排好的事情。
【英语】初中英语动词的时态及其解题技巧及练习题(含答案)及解析一、初中英语动词的时态1．My grandma _______ to the radio when I got home just now.A．listens B．listened C．is listening D．was listening【答案】D【解析】句意：我刚才到家的时候我的奶奶正在听广播。
结合语境理解可知，当我到家这一时刻，另一个动词正在进行，when引导的时间状语从句是一般过去时，主句表达的是过去正在进行的动作，故句子的时态为过去进行时，答案为D。
2．—Could you tell me what he said just now?—Sorry, I ___ about what I would do tomorrow.A．will think B．was thinking C．thought D．think【答案】B【解析】【详解】句意：你能告诉我他刚才说什么吗？对不起，我正考虑明天我要做什么。
考查时态。
A. will think（一般将来时）；B. was thinking（过去进行时）；C. thought （一般过去式）；D. think（一般现在时）；根据句意，“考虑”这个动作发生刚才在他讲话的时候，在过去某个时间点发生的动作用过去进行时，故选B。
3．—Where’s your father, Tom?— He __________newspaper in the study.A．reads B．readC．is reading D．has read【答案】C【解析】句意：--汤姆，你爸爸在哪里？--他在书房里读报纸。
根据问句“汤姆，你爸爸在哪里？”，判断答语的句意是“他正在书房里读报纸。
”即设空处的动作在说话时刻正在进行着，所以句子用现在进行时，现在进行时的构成：am/is/are+动词的现在分词，故答案为C。
【英语】初中英语动词的时态常见题型及答题技巧及练习题(含答案)含解析一、初中英语动词的时态1．Not only my classmates but also our English teacher Chinese poems, so we often share their favourite ones.A．like B．liked C．likes D．liking【答案】C【解析】句意：不仅我的同学们而且我的老师都喜欢古诗，因此我们经常分享他们最喜欢的诗。
本题考查动词的时态。
A. like动词原形； B. liked 过去式；C. likes 单数第三人称； D. liking现在分词形式。
Not only···but also···不仅···而且···用于连接两个对等的成分；若连接两个成分作主语，其后谓语动词与靠近的主语保持一致。
our English teacher为单数第三人称，故选C2．— Who the classroom tomorrow, Tony?— Our group.A．will clean B．cleans C．cleaned D．clear【答案】A【解析】句意：——托尼，明天谁打扫教室？——我们小组。
考查一般将来时。
根据提示词tomorrow可知时态用一般将来时，其构成为：will+动词原形；故答案选A。
3．—Hi, Nora. Is your mother at home?—Just a minute! She _______ flowers in the garden.A．plant B．is planting C．planted D．was planting【答案】B【解析】【详解】句意：——嗨，Nora。
你妈妈在家吗？——等一下！她正在花园里种花。
英语语法八大时态一．一般现在时结构肯定句式: 主语+动词原形/动词的第三人称单数+其他否定句式: 主语+（助动词）don't/doesn't +动词原形+其他一般疑问句式: Do/Does+主语+动词原形+其他简略回答: (肯)Yes,主语+do/does (否)No,主语+do/does not缩写形式: don't = do not doesn't = does not例句：He often goes swimming in summer.I usually leave home for school at 7 every morning.二．一般过去时态结构肯定句式: 主语+动词过去式+其他否定句式: 主语+（助动词）didn’t +动词原形+其他一般疑问句式: Did+主语+动词原形+其他基本结构否定句一般疑问句Be动词was/were+not was/were提前，放于句首行为动词didn’t+do(动词原形）Did+主语+do（动词原形）三．一般将来时结构结构1：肯定句式：主语+助动词will+动词原形+其他否定句式：主语+助动词will+动词原形+not+其他一般疑问句式：助动词Will+主语+动词原形+其他简单回答：在口语中，will在名词或代词后常缩为’ll，wii not常简缩为won’t。
在疑问句中，主语为第一人称时（I和we）时，常用助动词shall。
例如：She’ll go to play basketball.Shall we go to the zoo?结构2：肯定句式：主语+be going to +动词原形+其他否定句式：主语+be not going to +动词原形+其他一般疑问句式：Be+主语+going to+动词原形+其他简略回答：（肯）Yes,主语+be （否）No,主语+be not将来时其他表示法1）be going to表示将来表示说话人的打算、计划、安排或根据迹象判断必然或很可能发生的事情。
初中英语语法专项复习：英语各个时态和语态讲解及练习题初中英语有16种时态,但是常用的只有9种：一般现在时、一般过去时、一般将来时、现在进行时、过去进行时、现在完成时、过去完成时、过去将来时、现在完成进行时;下面分别介绍;1、一般现在时的用法1 一般现在时表示经常性、习惯性的动作；表示现在的状态、特征和真理;句中常用always,usually,often,sometimes,seldom,rarely,never,every daymorning,Monday,week,...etc.,every there years,once a weekday,month,...etc.,...等时间状语;例如：a. He goes to school every day.b. He is very happy.earth moves around the sun.2 在时间状语从句和条件状语从句中,用一般现在时表示将来;例如：a. If you come this afternoon, we’ll have a meeting.b. When I graduate, I’ll go to countryside.2.一般过去时的用法1 表示过去某时间发生的事、存在的状态或过反复发生的动作;常和:last weeknight,Monday,month,year,...etc.four years agodays,month,...etc.before1980three,liberation,从句,...etc.the day before yesterday,the day before last,the year before last,just now,a monent ago,yesterday,yesterday morning,this morning,at first,at last,in the end,finally,then,..a. He saw Mr. Wang yesterday.b. He worked in a factory in 1986.2表示过去经常发生的动作, 也可用“used to “ 和“would + 动词原形”; I used to smoke. During the vacation I wouldm in the sea.注：”used to “ 表示过去常发生而现在不再发生的动作或存在的状态;a. I am used to the climate here.b. He is used tomming in winter.3.一般将来时的用法一般将来时表示将来的动作或状态;其表达形式除了“ will 或shall + 动词原形”表示即将发生的或最近打算进行的事;常和：next weekMonday,month,year,...etc.in three daysan hour,...etc.tomorrow,tomorrow morning,the day after tomorrow,the day after next,the year after next,tonight,in 20102016...etc.this evening,this Saturday,after Wednesday,soon,sometime next week,one day in futuer,sooner or later,...1be going to do 结构It is going to rain.We are going to have a meeting today.2 “be about to + 动词原形” 表示即将发生的动作,意为be ready to do sth. 后面一般不跟时间状语; We are about to leave.3 go , come , start, move, leave, arrive ,stay 等可用进行时态表示按计划即将发生的动作;I’m leaving for Beijing.4.现在进行时的用法1 现在进行时表示现在正在进行的动作,由“ be + 现在分词” 构成;常和：now,these daysweeks,months,...etc. this monthweek,...etc.Look,Listen,...另外, “系动词+ 介词或副词” 也表示进行时的意义;What are you doingThe bridge is under construction.2 表示感觉、愿望和状态的某些动词如have, be , here, se, like 等一般不用进行;5.过去进行时的用法1 过去进行时过去某一时刻、某一阶段正进行的动作,由“ was were + 现在分词”构成;常和：this time yesterday,this time last Friday,in those days,at nine last night,from one to three yesterday afternoon,...In 1980 he was studying in a university.He was reading a novel when I came in.6.现在完成时的用法现在完成时由“have/has + 过去分词.其使用有两种情况：1 现在完成时所表示的动作在说话之前已完成,但对现在有影响;句中没有具体时间状语;常和：just,alreadly,yet,never,ever,now,before,this week,today,these days,once,twice,three times,...He has gone to Fuzhou.He has been to Fuzhou.2 现在完成时所表示的动作开始于过去,持续到现在,也许还会持续下去常用for 和since表示一段时间的状语或since then1949,last Monday,two o'clock,从句...,etc.,ever since then,for three daysa long time,two hours,...etc.so far , now, today, this wek month, year 等表示包括现在内的状语;He has studied English for 5 years.He has studied English since 1985.Now I have finished the work..注意：表示短暂时间动作的词如come, go , die, marry, buy 等的完成时不能与for, since 等表示一般时间的词连用;正确：I have bought the book already.错误：I have bought the book for two years.改：I have had the bookl for two years.7．过去完成时的用法1 过去完成时由“had + 过去分词”构成;过去完成时的动作表示过去某一时刻或某一时刻或某一动作之前完成的动作或状态;句中常用by then1977,yesterday,eight last night,the time we got there,...etc.by the end of last termweek,year,month,...etc..by, before, until, when 等词引导的时间状语;By the end of last year we had built five new houses.I had learnt 5000 words before I entered the university.2过去完成时的动词还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或持续下去;Before he slept, he had worked for 12 hours.8．过去将来时的用法过去将来时表示从过去的某个时间看来将要发生的动作或存在的状态;过去将来时由“should 或would + 动词原形” 构成;第一人称用should, 其他人称用would. ;常和：They were sure that they would succeed.二动词语态1．当句子的主语是动作的执行者时, 谓语的形式叫主动语态;句子的主语是动作承受者时,谓语的形式叫被动作语态;被动语态由助动词be + 过去分词构成,时态通过be 表现出来;1 一般现在时：You are required to do this.2 一般过去时：The story was told by her.3 一般将来时：The problem will be discussed tomorrow.4 现在进行时：The road is being widened.5 过去进行时：The new tool was being made.6 现在完成时：The novel has been read.7 过去完成时：He said that the work had been finished.8 过去将来时：He said that the trees would be planted soon.2. 一些特殊的被动结构1 带情态动词的被动结构：The problem must be solved soon.2 带不定式的被动结构：The room is going to be painted.The homework needs to be done with care.3 短语动词的被动：a.不及物动词+介词：若这类短语动词是及物性的,则可用于被动语态中,如：laugh at, look after, talk about, think of 等;若这类短语动词是不及物性的则不可用于被动语态中,如：book up, look down. 等b.及物动词+副词：bring about, carry out, find out, make out, put away, put off, take up, turn down, turn out, wipe out 等c. 动词+副词+介词：do away with, face up to, give into ,look down upon, make up with等d. 动词+名词+介词：catch sight of, keep on eye on, make a fool of , pay attention to , put an end to , set fire/light to , take notice of 等4 带复合宾语的动词在改为被动语态时,一般把主动结构中的宾语改为主语,宾语补足语保留在谓语后面;We always keep the classroom clean.比较：The classroom is always kept clean.5主动形式表示被动意义的词;常见的有：a.主动形式,这时动名词同句中的主语有动宾关系;The children need looking after.The windows wants /requires repairing.This point deserves mentioning.练习题1. It is a fine day. The sun __________shine brightly.2. They ___________visit the Science Museum next Sunday.3. Mr Brown________live in Beijing since he came to China.4. Mr Wang ________teach us English two years ago.5. The Smiths _______________ watch TV at this time last night.6. We __________learn about ten English songs by the end of last term.7. Father said that he ____________buy a new bike for me the next Friday.8. Bill isn¡¯t here. He ___________chat with his friends in the classroom.9. The teacher said that the moon __________go round the earth.10. The Young Pioneers will go to the zoo if it ____________not rain this Sunday.11. Listen They __________talk about the new film.12. Jim asked us what ___________happen in China in 1976.13. My mobile phone ___________steal on a bus last week.14. The host ____________interview the little boy just now.15. The Greens __________watch TV now.16. He said that he _____________ring me up when he got there.17. We ____________learn English for about three years.18. My brother_____________join the League in 1997.19. The farmers __________pick apples when I saw them.20. The red skirt __________cost the girl forty yuan.21. The film ____________begin when I got to the cinema.22. The girl told me that she wanted to be an English teacher when she _____grow up.23. My sister is a student and she _____________study at a middle school nearby.24. Mr Green __________travel to several places in South China since he came here.25. You _________catch the early bus if you get up early.26. _______you been________wear glasses all the time27. I’ll go home as soon as I _______finish my homework.29. Most science books are ______write in English.30. I ____________stay there for two months last year.31. Tell Lily to call me as soon as she _______.A. will arriveB. gets thereC. has goneD. reach here32. ----Hi, Kate. You look tired. What’s the matter ----I ______ well last night.A. didn’t sleepB. don’t sleepC. haven’t sleptD. won’t sleep33. ----Excuse me, look at the sign over there, please. Could you stop smoking----Sorry, I ____ that.A. didn’t seeB. don’t seeC. won’t seeD. can’t see34. ----Well, I found this. I think it must be yours. ----My watch Thank you. Where _____itA. do you findB. had you foundC. were you findingD. did you find35. ----Don you know when Dr White ____ for dinner this evening----No, but I think he ____ when he is free.A. will come; comesB. will come; will comeC. comes; comesD. comes; will come36. Look at those black clouds. It _____ rain. Let’s hurry. A. maybe B. would C. has D. is going to37. ----Jimmy is leaving for a holiday. ----Really Where ____ he ____A. has; goneB. will; goC. did; goD. does; go38. ----Shall we go shopping now ---Sorry, I can't. I ____ my shirts.A. washB. washesC. washedD. am washing39. ----I called you yesterday evening, but there was no answer.----Oh, I am sorry. I ___ dinner at my friend's home.A. haveB. hadC. was havingD. have had40. The Oriental Pearl TV Tower ____ thousands of visitors since 1995.A. attractedB. attractsC. has attractedD. will attract46. ----Why didn't you go to the cinema yesterday -----Because I ____ the film before.A. had seenB. have seenC. have watchedD. has watched47. I don't think John saw me. He ____ a book at that moment.A. just readB. has just readC. was just readingD. had just read48. Mr Smith ____ a book about China last year but I don't know whether he has finished it.A. has writtenB. wroteC. had writtenD. was writing49. Mr White ____ the newspaper while his daughter ____TV.A. has read; was watchingB. was reading; watchedC. was reading; was watchingD. reading; watched50. ---- I ____ you at the meeting. Why ----I was ill. A. saw B. have seen C. not see D. didn't see51. The 29th Olympic Games ____ in Beijing in 2008. A. hold B. will hold C. will be held D. held52. Hurry up The play ____ for ten minutes. A. has been on B. has begun C. had begun D. began53. ----May I speak to Mr Smith ----Sorry, he ____ Australia. But he ____ in two days.A. has been to; will come backB. has gone to; will be backC. has been in; would come backD. is leaving for; doesn't come back54. I can't go to the theater tonight because I ____ my ticket.A. have lostB. had lostC. will loseD. was losing55. ----What a nice bike How long ____ you ____ it ----Just two weeks.A. have; boughtB. did; buyC. have; hadD. are; having56. ----I'm sorry to have kept you waiting. ----Oh, not at all. I ____ here only for a few minutes.A. have comeB. had beenC. wasD. have been57. ----____ my dictionary anywhere ---- Yes. I saw it on your desk a moment ago.A. Did you seeB. If you seeC. Had you seenD. Would you see58. We were all surprised when he mad it clear that he ____ office soon.A. leavesB. would leaveC. will leaveD. had left答案：I. 1. shines/ is shining 2. are going to/ will visit 3. has lived 4. taught5. were watching6. had learned7. would buy8. is chatting9. goes 10.doesn't rain 11. are talking 12. happened 13. was stolen 14. interviewed15. are watching16. would ring 17. have learned 18. joined 19. were picking 20. cost21. had begun 22. grew 23. studies 24. has traveled 25. will catch26. Have; wearing 27. finish 28. haven't heard 29. written 30. stayedII. 31--35 BAADB 36--40 DBDCC 41--45 ACBAC 46--50 ACDCD51--55 CABAC 56--60 DABDA 61--65 BDBAB 66-70 BDABC 71--75 BCADD。
时态英语共有四时四体，其表现形式如下(以do为例）时态是表示行为、动作和状态在各种时间条件下的动词形式。
因此，当我们说时态结构的时候，指的是相应时态下的动词形式。
1. 一般现在时用法:A) 表示现在发生的动作、情况、状态和特征。
B) 习惯用语。
C) 经常性、习惯性动作。
例:He always helps others。
(他总是帮助别人。
）D）客观事实和普遍真理。
尤其要注意,如果前后文不是一般现在时，则无法保持主句、从句时态一致。
E) 表示一个按规定、计划或安排要发生的动作,（仅限于某些表示“来、去、动、停、开始、结束、继续”等的动词 )可以与表示未来时间的状语搭配使用.常见的用法是:飞机、火车、轮船、汽车等定期定点运行的交通方式。
例：The next train leaves at 3 o’clock this afternoon。
（下一趟火车今天下午3点开车。
）How often does this shuttle bus run？ (这班车多久一趟？）F) 在时间和条件状语从句里经常用一般现在(有时也用现在完成时)表示将来事情。
例：When you have finished the report, I will have waited for about 3 hours。
（等你完成这份报告的时候，我就已经等了将近3个小时了。
)2。
现在进行时用法：现在正在进行的动作.3。
现在完成时用法：A) 表示动作到现在为止已经完成或刚刚完成。
例：I bought a new house, but I _________ my old one yet，so at the moment I have two houses。
A) didn’t sell B) sold C) haven't sold D）would sell答案是C）haven't sold。
B) 表示从过去某时刻开始，持续到现在的动作或情况，并且有可能会继续延续下去。
16种英语时态总结归纳时态（Tense）是表示行为、动作和状态在各种时间条件下的动词形式。
因此，当我们说时态结构的时候，指的是相应时态下的动词形式。
英语时态分为16种：一般现在、一般过去、一般将来、过去将来时，以及这四者的进行时、完成时和完成进行时。
1. 一般现在时用法：A) 表示现在发生的动作、情况、状态和特征。
B) 习惯用语。
C) 经常性、习惯性动作。
例：He always helps others. （他总是帮助别人。
）D) 客观事实和普遍真理。
尤其要注意，如果前后文不是一般现在时，则无法保持主句、从句时态一致。
E) 表示一个按规定、计划或安排要发生的动作，（仅限于某些表示“来、去、动、停、开始、结束、继续”等的动词）可以与表示未来时间的状语搭配使用。
常见的用法是：飞机、火车、轮船、汽车等定期定点运行的交通方式。
例：The next train leaves at 3 o'clock this afternoon.（下一趟火车今天下午3点开车。
）How often does this shuttle bus run? （这班车多久一趟？）F) 在时间和条件状语从句里经常用一般现在（有时也用现在完成时）表示将来事情。
例：When you have finished the report, I will have waited for about 3 hours.（等你完成这份报告的时候，我就已经等了将近3个小时了。
）2. 现在进行时(be doing)用法：现在正在进行的动作。
3. 现在完成时(have done)用法：A) 表示动作到现在为止已经完成或刚刚完成。
例：I bought a new house, but I _________ my old one yet, so at the moment I have two houses.A) didn't sell B) sold C) haven't sold D) would sell答案是C) haven't sold。
B) 表示从过去某时刻开始，持续到现在的动作或情况，并且有可能会继续延续下去。
此时经常用延续性动词。
时间状语常用since加一个过去的时间点，或for 加一段时间，或by加一个现在时间。
例：Great as Newton was, many of his ideas ___________ today and are being modified by the work of scientists of our time.A) are to challenge C) have been challengedB) may be challenged D) are challenging全句的意思是：“虽然牛顿是个伟大的人物，但他的许多见解直到今天还在受到挑战，并且被现代科学家的工作所修正。
”challenge是及物动词，在本句中应当是被动语态；其动作延续到今天，所以要用现在完成时态。
可见答案是C) have been challenged。
A) are to challenge和D) are challenging都是主动语态，不可能是答案。
B) may be challenged虽然是被动语态，但意思与全句内容不合，所以不对。
C) 表示发生在过去，但对现在仍有影响的动作或情况。
通常用点动词，如：arrive, begin, find, give, lose等。
例：John has broken his left leg.（约翰摔断了左腿。
）注意事项A) 现在完成时是联系过去和现在的纽带。
现在完成时和过去时的区别在于：现在完成时强调动作的动态，或受动态的影响，是动态的结果，对现在有影响；过去时只表示过去的某个具体时间里发生的动作，与现在没有联系。
例：He worked in that hospital for 8 years.（他曾经在那家医院工作了8年。
这只是讲述一个过去的事实，他现在已经不在那家医院了。
）He has worked in that hospital for 8 years.（他已经在那家医院里工作了8年。
表示他从过去开始工作，一直工作到现在，现在仍在那家医院工作。
）B) 因为含有for加一段时间或since加一个时间点这样的时间状语的完成时，有动态和延续性的特点，所以不能使用终端动词或瞬间动词。
例：My sister has been married for 5 years.（过去分词做表语表示状态，可以延续）My sister has married. Don't disturb her.（终端动词）C) 在"this is the first/ second/ third……time that……"句型里要求用完成时。
例：This is the second time that the products of our company have been shown in the International Exhibition.（这是我公司产品第二次参加国际展览会。
）D) 句型"It is/ has been……since"所使用的两种时态都正确。
例：It is/ has been 10 years since I last saw him.（从我上次见到他以来已经10年了。
）E) 在"no sooner than"、"hardly/ scarcely ……when"、"before"、"prior to"等句型中，主句要求完成时。
例：I haven't met that professor prior to today.（以前我从未见过那位教授。
）4. 现在完成进行时(have been doing)用法：表示某一动作开始于过去某一时间，延续或重复地出现至今，或将继续延续至将来。
例：We have been working on this project for over a month now.（到目前为止，我们一直在处理那个项目，已经花了一个多月时间了。
）注意事项：与现在完成时相比，现在完成进行时更强调：在从过去到现在的时间里，动作或状态一直持续或一直反复出现。
例：1997年6月四级第45 题It seems oil ___________ from this pipe for some time. We'll have to take the machine apart to put it right.A) had leaked B) is leakingC) leaked D) has been leaking从本题上下文看，这两个句子的意思是：“看来，这个管道漏油已有一段时间了，我们将不得不拆卸机器排除故障。
”第二句表示将要采取的措施。
第一句动作发生在第二句之前，并且延续到现在为止仍在继续。
因此，空格中需用现在完成时或现在完成进行时。
D) has been leaking是现在完成进行时，因此是本题的答案。
有11%的考生误选了B) is leaking。
由于本句有时间状语for some time，表示谓语动作延续，谓语不能用现在进行时，必须用和完成时有关的时态。
有些考生误选了C) leaked或A) had leaked。
是因为他们没有注意到本题第二句是一般将来时，所以第一句的谓语不能用过去时或过去完成时。
5. 一般过去时用法：A) 表示过去某个时间发生的动作或情况。
B) 表示过去习惯性动作。
特别是由would/ used to do表达的句型，本身表示的就是过去时。
例：The old man would sit on a bench in the quiet park and look at others for hours without doing anything or talking to anybody.（老人过去常常坐在宁静的公园里的一条长椅上，看着其他的人，一坐就是数个小时，什么也不干，也不和任何人交谈。
）He used to visit his mother once a week.（他以前总是每周看望一次他的母亲。
）C) 有时可代替一般现在时，表达一种婉转、客气、礼貌、商量的语气。
例：I wanted to ask you if I could borrow your car?（我想向您借车用一用，可以吗？）Would you mind my sitting here?（您介意我坐在这里吗？）注意事项：A) 注意时间状语的搭配。
一般过去时的时间状语应该是表示过去某个时间的词或词组，如：yesterday, last month, in 1999, two days ago等，绝对不可与recently, in the past 10 years, this month 等连用，因为这样的时间状语都与现在有关系，应该用现在完成时或一般现在时。
B) used to do的否定形式和疑问形式很特别：你怎么写都正确。
以否定形式为例：used not to do, didn't used to do, didn't use to do都对。
Used to do经常与be used to doing sth/ sth结构进行对比。
前者表示"过去常常或过去曾经"，要求加动词原形；后者表示"习惯于"，要求加名词或动名词。
6. 过去完成时(had done)用法：表示在过去的某个时间或动作以前已经发生的动作或已经存在的状态。
就是我们常说的：表示"过去的过去的动作或状态"。
Until then, his family _________ from him for six months.A) didn't hear C) hasn't heard B) hasn't been hearing D) hadn't heard全句的意思是：“到那时为止，他家里已经有六个月没得到他的消息了。
”由此可以看出，谓语动词的动作延续到过去的某一时刻才完成，因此谓语要用过去完成时。
答案是D)。
其它选项中：A) didn't hear，因为一般过去时只表示过去发生的事情或存在的状态，所以不能与时间状语for six months连用。
B) hasn't been hearing，现在完成进行时表示过去某时刻继续到现在或现在还在进行的动作，与题意不符。
