初一英语下学期三种时态的综合 新目标.ppt

1、英语时态,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! Listen! at this

2、 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. 如果没有be动词，看原

3、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/es V-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 “结尾变

4、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 cla

5、sses 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

6、,C,have - look - 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 hop

7、ed played tried planned visited 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 Ch

8、ina.,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

9、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 days ago.,is singing,is running,watches,v

10、isited,play,are reading,was,went,常用时间,常与一般过去时态连用的时间有：,yesterday yesterday morning (afternoon, evening) last night (week, month, year) two days ago, a week ago, three years ago in 1990, (in 1998),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 always in 1897 three

11、times a week,一般现在时 一般过去时 现在进行时,PRACTISE,改写句子： 1、Lucy did her homework at home.（改否定句） Lucy _ _ her homework at home. 2、He found some meat in the fridge.（变一般疑问句) _ he _ _ meat in the fridge? 3、She stayed there for a week.（对划线部分提问） _ _ _ she _ there? 4、There was some orange in the cup.（变一般疑问句) _ there _ orange in the cup?,didnt do Did find any How long did stay Was any,Thats great,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 -