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1、七年级英语：三大时态专题 课件制作人：制作人： 陈建陈建 新新 在英语中，在英语中，不同时间不同时间发生的动作发生的动作或存在的状态要用或存在的状态要用不同的动词形式不同的动词形式来来表现。表现。 每种时态的概念、信息词、每种时态的概念、信息词、结构、句式变化、以及某些时态结构、句式变化、以及某些时态间的相互区别间的相互区别重点掌握重点掌握时态时态Tense时时态态现在进行时：现在进行时：一般现在时：一般现在时：一般过去时：一般过去时：现在正在现在正在进行进行的动作的动作 经常经常或或习惯性习惯性的动的动作或存在的状态。作或存在的状态。过去过去某个时间或时间段发某个时间或时间段发生的动作或存在
2、的状态。生的动作或存在的状态。(The Present Continuous Tense)(The Simple Present Tense)(The Simple Past Tense)各时态常用的信息词现在进行时：一般现在时:一般过去时: now , Look! Listen! at this time Where is ? Dont talk! Its 8:00am. always , usually, often, sometimes ,seldom, never, every day, every ,three times a day last night, last, two da
3、ys ago, ago, in 1999, in +过去过去的年份的年份, just now =a moment ago, yesterday, yesterday morning 改一般疑问句的方法：改否定句的方法：首先看有无be动词，如果有，将be提到句首并大写，句末打问号.如果没有be动词，看原句的动词形式来决定借用助动词do/does/did,并且行为动词要还原。V-原形V-s/esV-ed(过去式)+动词原形?以此类推首先看有无be动词，如果有，在be 动词后面加not.如果没有be 动词，看原句的动词形式来决定借用助动词do/does/did,并在后面加not,并且行为动词要还原。
4、主语+dont/doesnt/didnt+动词原形DoDoesDid现在分词现在分词 的构成：的构成：动词第三人称动词第三人称单数的构成：单数的构成：过去式过去式的构成：的构成：直接加直接加-ing.重读辅元辅，双写尾字母加重读辅元辅，双写尾字母加-ing.以以e 结尾去结尾去e加加-ing .直接加直接加-s.以以s, x, ch, sh, o结尾加结尾加-es.以以“辅音辅音+y “结尾变结尾变y 为为i再加再加-es.直接加直接加-ed.以以e结尾只加结尾只加d.重读辅元辅，双写尾字母再加重读辅元辅，双写尾字母再加-ed.以以“辅音辅音+y”结尾变结尾变y 为为i 再加再加-ed. 对比
5、对比时态时态动词形式动词形式否定句否定句一般问句一般问句现在进行时现在进行时 一般现在时一般现在时一般过去时一般过去时表格对比学习表格对比学习be+v-ing(现在分词）现在分词）在在be 后后加上加上not Be提到提到句首句首V -原形原形V-三人单三人单在行为在行为v.前借用前借用do ,does后加后加not，行为动词还原行为动词还原Do,Does 提到句首，提到句首，行为动词行为动词还原还原V-ed(过去式）过去式）在行为在行为v.前借前借用用did后加后加not，行为动词还行为动词还原原Did 提到句提到句首，行为首，行为动词还原动词还原判断时态形式判断时态形式：1.He alwa
6、ys likes playing the piano.( )2.We are having an English classes now.( )3.They often go home late.( )4.Lucy danced the disco at the party last night.( )5.I liked go to the zoo when I was young.( )6.My teacher is friendly to us.( )7.Look! They are playing football.( )8.She was born in 1990.( )9.I los
7、t much money last night.（ ）A.现在进行时B.一般现在时C.一般过去时ABCABBCCC have - look - begin- use- shop- get- dance- study-现在分词现在分词第三人称单数第三人称单数过去式过去式study-finish-have-go-do-play-watch-give-need-stop-hope-play-try-plan-visit-like- having looking beginning using shopping getting dancing studying studies finishes has
8、 goes does plays watches gives needed stopped hoped played tried planned visited liked1.He is a teacher.2. Kangkang comes from China.3. I usually take the bus to work.4.They are having classes.5.Jane played the guitar last night.先（一般疑问句） 再（否定句）Is he a teacher?He isnt a teacher.Does Kangkang come fro
9、m China?Kangkang doesnt come from China.Do you usually take the bus to work?I dont usually take the bus to work.Are they having classes?They arent having classes.Did Jane play the guitar last night?Jane didnt play the guitar last night.句句型型变变化化操操练练用所给用所给动词的适当形式填空。动词的适当形式填空。1. Listen! Mary _ ( sing)
10、now.2. A young man _ (run) on the playground now.3. My mother _(watch) TV play every day.4. Old Bush _(visit) China again last month.5. I _ (play) sports three times a day.6. Look! Lucy and Lily _(read) books.7. There _(is) a football match yesterday afternoon.8. Our class _( go) to the zoo three da
11、ys ago. is singing is running watches visited play are reading was went判断下列信息词是属于哪种时态判断下列信息词是属于哪种时态 last night now every day Look! yesterday often Listen! two years ago alwaysin 1897 three times a week 一般现在时一般过去时现在进行时过去式的不规则变化过去式的不规则变化 blow - buy - can - come- do - eat - fall - find - forget - get - give- go - have- know- learn - make - meet - read - run - say - see - send- sit - take- think- will - tell - begin - teach - catch - blew bought could came did ate fell found forgot got gave went had knew learnt made met read ran said saw sent sat took thought would told began taught caught
