七年级三大时态专题_课件

1、 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时态时态现在进行时：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，反复经常，反复或或习惯性习惯性的动作或存在的状态。的动作或存在的状态。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的状态。生的动作或存在的状态。(The Prese

2、nt Continuous Tense)(The Simple Present Tense)(The Simple Past Tense)当前一段时间一直在当前一段时间一直在进行进行的动作的动作 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 ,never, every day, every last night, last, two days ago, ago, in 1999, i

3、n +过去过去的年份的年份, just now yesterday, yesterday morning 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 一般现在时一般过去时现在进行时对比学习对比学习w 现在进行时现在进行时 be(am,is,are)+Ving w 一般现在时一般现在时 be(am,is,are) 或或V原原/V单三单三s/esw 一般过去时一般过去时 be(was,were) 或或Vp.t现在分词现在

4、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.不规则变化特别注意不规则变化特别注意清念清念 /t/ ,元浊元浊/d/ ; /t/ /

5、d/ 之后念之后念/id/规则动词规则动词-ed的读音的读音说明：说明：1、清后念、清后念 /t/ ，即即 ed 在清辅音后面念在清辅音后面念 /t/ ,例：例：finished helped watched looked passed cooked2、元或浊后元或浊后 /d/ ,即即 ed 在元音，浊辅音后面念在元音，浊辅音后面念 /d/ , 例：例：borrowed enjoyed called moved 3、/t/ /d/ 之后念之后念 /id/ , 即即 ed 在在 /t/ /d/ 音后面念音后面念 /id/ 例：例：wanted shouted needed counted过去式的

6、不规则变化过去式的不规则变化do -find -go -have-make -read -put -see -sit -write- give- come- eat -get -take- tell - meet - run - say - didfound wenthad made read put saw sat wrote gave came ate got took told met ran said 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

7、-go-do-play-watch-give-go-write-find-play-study-see-visit-spend- having looking beginning using shopping getting dancing studying studies finishes has goes does plays watches gives went wrote found played studiedsaw visited spent判断时态形式判断时态形式：He always likes playing the piano.( )We are having an Engl

8、ish classes 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.现在进行时现在进行时B.一般现在时一般现在时C.一般过去时一般过去时ABCA

9、BBCCC用所给动词的适当形式填空。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 every day.4. Old Bush _(visit) China again last month.5. Mary often_ (play) sports .6. Look! Lucy and Lily _(read) books.7. There _(is) a football match yesterday a

10、fternoon.8. Our class _( go) to the zoo three days ago.9. Be quiet! My mother (sleep). is singing is running watches visited plays are reading was went is sleepingExercises w 用所给动词的适当形式填空。用所给动词的适当形式填空。10. Dont_(do)it like that. Do it like this.12. Would you like _( play) football? 13. Its 6 oclock i

11、n the morning. They _ ( have) their breakfast. do to play are having 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。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DoDoes

12、DidHe 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 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