初中英语时态讲解.doc

初中英语时态讲解第一部分：知识讲解1一般过去时表示过去某个时间发生的动作或存在的状态，常和表示过去的时间状语连用。一般过去时也表示过去经常或反复发生的动作。2Be动词在一般过去时中的变化：am 和is在一般过去时中变为was。（was not=wasnt）are在一般过去时中变为were。（were not=werent）带有was或were的句子，其否定、疑问的变化和is, am, are一样，即否定句在was或were后加not，一般疑问句把was或were放到句首。3句中没有be动词的一般过去时的句子否定句：didnt +动词原形，如：Jim didnt go home yesterday.一般疑问句：在句首加did，句子中的动词过去式变回原形。如：Did Jim go home yesterday? 特殊疑问句：疑问词+did+主语+动词原形？如： What did Jim do yesterday?疑问词当主语时：疑问词+动词过去式？如：Who went to home yesterday?动词过去式变化规则：1一般在动词末尾加-ed，如：pull-pulled, cook-cooked2结尾是e加d，如：taste-tasted3末尾只有一个元音字母和一个辅音字母的重读闭音节，应双写末尾的辅音字母，再加-ed，如：stop-stopped4以“辅音字母+y”结尾的，变y为i，再加-ed，如：study-studied5不规则动词过去式： am,is-was are-were, do-did, see-saw,say-saidgive-gave, get-got,go-went, come-came,have-had,eat-ate, take-took, run-ran, sing-sang, put-put,make-made,read-read, write-wrote,draw-drew, drink-drank,fly-flew,ride-rode,speak-spoke, sweep-swept,buy-boughtswim-swam,sit-satbring-brought can-couldcut-cutbecome-became begin-began draw-drew feel-feltfind-foundforget-forgothear-heardkeep-kept know-knewlearn-learnt（learned）leave-leftlet-letlose-lost meet-metread-readsleep-slept speak-spoketake-tookteach-taughttell-toldwrite-wrote wake-woke think-though第二部分：练习过去时练习：写出下列动词的过去式isam_ fly_ plant_ are _ drink_play_ go_ make _ does_ dance_worry_ ask _ taste_ eat_ draw_put _ throw_ kick_ pass_ do _一、用be动词的适当形式填空。1. I _ an English teacher now.2. She _ happy yesterday.3. They _ glad to see each other last month.4. Helen and Nancy _ good friends.5. The little dog _ two years old this year.6. Look, there _ lots of grapes here.7. There _ a sign on the chair on Monday.8. Today _ the second of June. Yesterday _ the first of June. It _ Childrens Day. All the students _ very excited.二、句型变换。There was a car in front of the house just now.否定句：_一般疑问句：_ 肯定回答：_否定回答：_2 They played football in the playground.否定句：_一般疑问句：_ 肯定回答：_否定回答：_三、用所给动词的适当形式填满空白。1. I _ (watch) a cartoon on Saturday.2. Her father _ (read) a newspaper last night.3. We _ to zoo yesterday, we _ to the park. (go)4. _ you _ (visit) your relatives last Spring Festival?5. _ he _ (fly) a kite on Sunday? Yes, he _.6. Gao Shan _ (pull) up carrots last National Day holiday.7. I _ (sweep) the floor yesterday, but my mother _.8. What _ she _ (find) in the garden last morning? She _ (find) a beautiful butterfly.9. It _ (be) Bens birthday last Friday 10. We all _ (have) a good time last night.11. He _ (jump) high on last Sports Day. 12. Helen _ (milk) a cow on Friday.13. She likes _ newspapers, but she _ a book yesterday. (read)14. He _ football now, but they _ basketball just now. (play)15. Jims mother _ (plant) trees just now.16. _ they _ (sweep) the floor on Sunday? No, they _.17. I _ (watch) a cartoon on Monday. 18 We _ (go) to school on Sunday.19. It _ (be) the 2nd of November yesterday. Mr White _ (go) to his office by car.20. Gao Shan _ (put) the book on his head a moment ago.21. Dont _ the house. Mum _ it yesterday. (clean)22. What _ you _ just now? I _ some housework. (do)23. They _ (make) a kite a week ago.24. I want to _ apples. But my dad _ all of them last month. (pick)25. _ he _ the flowers this morning? Yes, he _. (water)26. She _ (be) a pretty girl. Look, she _ (do) Chinese dances.27. The students often _ (draw) some pictures in the art room.28.What _ Mike do on the farm? He _ cows. (milk)一 现在进行时的构成：Am/is/ are+ v-ing是现在进行时的构成形式 v-ing现在分词的构成：一般情况 +ingfalling以不发音字母e结尾的单词去e, +ing having以重读闭音节结尾的单词，末尾只有一个辅音字母时.双写词尾字母+ingputting二 现在进行时的基本用法1表示说话时正在进行的动作 常和now连用，有时用一个动词如look（看）、listen（听）来表示now（现在）这一时间概念。 Look！A train is coming.看！火车来了 Listen！He is playing the piano.听！他在弹钢琴。2表示现阶段正在进行着的动作 但不一定是说话时正在进行。常和at present（目前）、this week（本周）、these days（这几天）等时间状语连用。 What lesson are you studying this week？你们本周学哪一课了？（说话时并不在学）3现在进行时有时可用来表示一个在最近按计划或安排要进行的动作 即是说可以用来代替将来时，但此时，一般要与表示将来的时间状语连用，而且仅限于少量动词。如：go（去）、come（来）、leave（离开）、start（开始）、arrive（到达）、return（返回）、sleep（睡觉）、 Are you going to Tianjing tomorrow？你明天去天津吗？ How many of you are Coming to the party next week？ 你们有多少人下周要来参加晚会？ 4 be going to+动词原形 这一句型表示即将发生的事或打算（准备）做的事，我们把它归在将来时里了。 she isnt going to speak at the meeting.她不打算在会议上发言。 注意：如果没有表示将来时间的状语，此类句子就可能指现在或现阶段的动作。 Where are you going next week？ 下周你计划去哪儿？用现在进行时表示将来时，因为有next week（下周）这一时间状语。 Where are you going？你现在去哪儿？因为没有表示将来时的时间状语，所以就按句型来翻译，即现在进行时。三 一般现在时和现在进行时的区别 1一般现在时表示经常性的动作；而现在进行时表示暂时性的动作。 He walks to work.他步行上班。（习惯、经常性的动作） Hes walking to work because his bike is being repaired. 他现在走着上班因为他的自行车正在修理。（只是暂时的情况） Where does he live？他家住在哪儿？（询问一般的情况）Where is he living（staying）？他这几天住在哪儿？（询问暂时一段时间的情况）2现在进行时有时可用来代替一般现在时，表达说话人的某种感惰，使句子有强烈的感情色彩。常与always，forever连用。 You are always forgetting the important thing.你总是把重要的事情忘掉。（表达出不满的情绪） Mary is doing fine work at school.玛丽在学校学习得挺不错。四现在进行时的四种句式（1）肯定句：be + doing如： 1. I am listening to the music now. 2. The students are drawing pictures now.（2）否定句：在be（am, is, are）后加not “be not + doing”如：1.I am not listening to the music now. 2.The students are not drawing pictures now.（3）疑问句：Be + 主语 + doing？如：1. Is Amy singing? Yes,she is. No, she isnt. 2. Are they swimming ?（4）特殊疑问句：特殊疑问词+一般疑问句 1.They are drawing pictures now.(对划线提问) -What are they doing ? 2 She is singing in the classroom. -Where is sh