七年級三大時態(tài)專題_課件

1、 在英語中，在英語中，不同時間不同時間發(fā)生的動作發(fā)生的動作或存在的狀態(tài)要用或存在的狀態(tài)要用不同的動詞形式不同的動詞形式來來表現(xiàn)。表現(xiàn)。 每種時態(tài)的概念、信息詞、每種時態(tài)的概念、信息詞、結構、句式變化、以及某些時態(tài)結構、句式變化、以及某些時態(tài)間的相互區(qū)別間的相互區(qū)別重點掌握重點掌握時態(tài)時態(tài)Tense時態(tài)時態(tài)現(xiàn)在進行時：現(xiàn)在進行時：一般現(xiàn)在時：一般現(xiàn)在時：一般過去時：一般過去時：現(xiàn)在正在現(xiàn)在正在進行進行的動作的動作 經常，反復經常，反復或或習慣性習慣性的動作或存在的狀態(tài)。的動作或存在的狀態(tài)。過去過去某個時間或時間段發(fā)某個時間或時間段發(fā)生的動作或存在的狀態(tài)。生的動作或存在的狀態(tài)。(The Prese

2、nt Continuous Tense)(The Simple Present Tense)(The Simple Past Tense)當前一段時間一直在當前一段時間一直在進行進行的動作的動作 各時態(tài)常用的信息詞現(xiàn)在進行時：一般現(xiàn)在時:一般過去時: 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 +過去過去的年份的年份, just now yesterday, yesterday morning 判斷下列信息詞是屬于哪種時態(tài)判斷下列信息詞是屬于哪種時態(tài) last night now every day Look! yesterday often Listen! two years ago alwaysin 1897 一般現(xiàn)在時一般過去時現(xiàn)在進行時對比學習對比學習w 現(xiàn)在進行時現(xiàn)在進行時 be(am,is,are)+Ving w 一般現(xiàn)在時一般現(xiàn)在時 be(am,is,are) 或或V原原/V單三單三s/esw 一般過去時一般過去時 be(was,were) 或或Vp.t現(xiàn)在分詞現(xiàn)在

4、分詞 的構成：的構成：動詞第三人稱動詞第三人稱單數(shù)的構成：單數(shù)的構成：過去式過去式的構成：的構成：直接加直接加-ing.重讀輔元輔，雙寫尾字母加重讀輔元輔，雙寫尾字母加-ing.以以e 結尾去結尾去e加加-ing .直接加直接加-s.以以s, x, ch, sh, o結尾加結尾加-es.以以“輔音輔音+y “結尾變結尾變y 為為i再加再加-es.直接加直接加-ed.以以e結尾只加結尾只加d.重讀輔元輔，雙寫尾字母再加重讀輔元輔，雙寫尾字母再加-ed.以以“輔音輔音+y”結尾變結尾變y 為為i 再加再加-ed.不規(guī)則變化特別注意不規(guī)則變化特別注意清念清念 /t/ ,元濁元濁/d/ ; /t/ /

5、d/ 之后念之后念/id/規(guī)則動詞規(guī)則動詞-ed的讀音的讀音說明：說明：1、清后念、清后念 /t/ ，即即 ed 在清輔音后面念在清輔音后面念 /t/ ,例：例：finished helped watched looked passed cooked2、元或濁后元或濁后 /d/ ,即即 ed 在元音，濁輔音后面念在元音，濁輔音后面念 /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過去式的

6、不規(guī)則變化過去式的不規(guī)則變化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-現(xiàn)在分詞現(xiàn)在分詞第三人稱單數(shù)第三人稱單數(shù)過去式過去式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判斷時態(tài)形式判斷時態(tài)形式：1. He always likes playing the piano.( )2. We are having a

8、n 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 lost much money last night.（ ）A.現(xiàn)在進行時現(xiàn)在進行時B

9、.一般現(xiàn)在時一般現(xiàn)在時C.一般過去時一般過去時ABCABBCCC用所給動詞的適當形式填空。用所給動詞的適當形式填空。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

10、 football match yesterday afternoon.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 用所給動詞的適當形式填空。用所給動詞的適當形式填空。10. Dont_(do)it like that. Do it like this.12. Would you like _( play) f

11、ootball? 13. Its 6 oclock in the morning. They _ ( have) their breakfast. do to play are having 改一般疑問句的方法：改否定句的方法：首先看有無be動詞，如果有，將be提到句首。如果沒有be動詞，看原句的動詞形式來決定借用助動詞do/does/did,并且行為動詞要還原。V-原形V-s/esV-ed(過去式)+動詞原形?以此類推首先看有無be動詞，如果有，在be 動詞后面加not.如果沒有be 動詞，看原句的動詞形式來決定借用助動詞do/does/did,并在后面加not,并且行為動詞要還原。主語+d

12、ont/doesnt/didnt+動詞原形DoDoesDid1. 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（一般疑問句） 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