三种时态一般现在时 一般过去时 现在进行时ppt课件.ppt

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1、七年级英语三大时态,制作人：董颖,在英语中，不同时间发生的动作或存在的状态要用不同的动词形式来表现。,每种时态的概念、信息词、结构、句式变化、以及某些时态间的相互区别,重点掌握,时态,Tense,时态,现在进行时：,一般现在时：,一般过去时：,现在正在进行的动作,经常或习惯性的动作或存在的状态。,过去某个时间或时间段发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! Lis

2、ten! 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 days ago, ago, in 1999, in +过去的年份, 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.

3、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。,主语+dont/doesnt/didnt+动词原形,现在分词 的构成：,动词第三人称单数的构成：,过去式的构成：,直接加-ing.重读辅元辅，双写尾字母加-ing.以e 结尾去e加-ing .,直接加-s.以s, x, ch, sh, o结尾加-es.以“辅音+y “结

4、尾变y 为i再加-es.,直接加-ed.以e结尾只加d.重读辅元辅，双写尾字母再加-ed.以“辅音+y”结尾变y 为i 再加-ed.,表格对比学习,be+v-ing(现在分词）,在be 后加上not,Be提到句首,V -原形V-三人单,在行为v.前借用do ,does后加not，行为动词还原,Do,Does 提到句首，行为动词还原,V-ed(过去式）,在行为v.前借用did后加not，行为动词还原,Did 提到句首，行为动词还原,小小测试,判断时态形式：,He always likes playing the piano.( )We are having an English classes

5、now.( )They often go home late.( )Lucy danced the disco at the party last night.( )I liked go to the zoo when I was young.( )My teacher is friendly to us.( )Look! They are playing football.( )She was born in 1990.( )I lost much money last night.（ ）,A.现在进行时B.一般现在时C.一般过去时,A,B,C,A,B,B,C,C,C,have - look

6、 - begin- use- shop- get- dance- study-,现在分词,第三人称单数,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 goes does plays watches gives,needed stopped hoped played tried planned visi

7、ted liked,词形转换,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 from China?Kangkang doesnt come from China.,Do you usually take the b

8、us 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.,句型变化操练,用所给动词的适当形式填空。,1. Listen! Mary _ ( sing) now.2. A young man _ (run) on the playground now.3. My mother _(watch) TV play

9、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 days ago.,is singing,is running,watches,visited,play,are reading,was,went,判断下列信息词

10、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,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,再见,