1、三種時態(tài)的比較學習 新目標七年級,在英語中，用動詞的形式的變化來表達不同時間發(fā)生的動作或存在的狀態(tài) ，這就是時態(tài)。,現(xiàn)在進行時,一般現(xiàn)在時,一般過去時,現(xiàn)在進行時：,一般現(xiàn)在時：,一般過去時：,現(xiàn)在或現(xiàn)階段正在進行的動作 。,經(jīng)常、反復或習慣性的動作以及存在的狀態(tài)。,過去某個時間發(fā)生的動作或存在的狀態(tài)。,概念,現(xiàn)在分詞 的構(gòu)成：,動詞第三人稱單數(shù)的構(gòu)成：,過去式 的構(gòu)成：,直接加 ing. 重讀輔元輔，雙寫尾字母加 ing. 以e 結(jié)尾去e加 ing .,直接加s. 以s, x, ch, sh, o結(jié)尾加es. 以“輔音+y “結(jié)尾變y 為i再加es.,直接加ed. 以e結(jié)尾只加d. 重讀輔元

2、輔,雙寫尾字母再加ed. 以輔音+y結(jié)尾變y 為i 再加ed.,謂語動詞形式,have - look - begin- use- shop- get- dance- study-,現(xiàn)在分詞,（一般現(xiàn)在時）,第三人稱單數(shù),過去式,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

3、 does plays watches gives,needed stopped hoped played tried planned visited liked,（現(xiàn)在進行時）,（一般過去時）,動詞形式的變化,標志詞,現(xiàn)在進行時,now , Look! Listen! at this time Where is ? Its 8:00 am.,標志詞,一般現(xiàn)在時,always , usually, often, sometimes , every day, three times a day等表達頻度的副詞常在一般現(xiàn)在時態(tài)中使用。,標志詞,一般過去時,last night ，two days

4、ago ， in 1999 （過去的年份），yesterday， just now =a moment ago剛才， the day before yesterday,判斷下列時間狀語屬于哪種時態(tài),last night now every day Look! yesterday often Listen! two years ago always in 1897 three times a week,一般現(xiàn)在時 一般過去時 現(xiàn)在進行時,變否定句的方法：,首先看有無 be 動詞，如果有，在be 動詞后面加not. 如： He is a teacher. He isnt a teacher.,主語

5、+dont/doesnt/didnt+動詞原形,如：She went to Paris yesterday. She didnt go to Paris yesterday,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,并且動詞要還原。,變一般疑問句的方法：,首先看有無be動詞，如果有，將be提到句首并大寫，句末打問號. 如： He is a teacher. Is he a teacher？ 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,并且動詞要還原。,動詞-原形 動詞-s/es 動詞-ed,+動詞原形?,如：Sh

6、e went to Paris. Did she go to Paris？,三種句式的對比,be+動詞-ing (現(xiàn)在分詞）,在be 后加上not,Be提到句首,動詞 -原形 動詞-第三人單數(shù),在行為動詞前借用do ,does后加not，行為動詞還原,Do,Does 提到句首，行為動詞還原,動詞-ed (過去式）,在行為動詞前借用did后加not，行為動詞還原,Did 提到句首，行為動詞還原,判斷時態(tài)形式：,He always likes playing the piano.( ) We are having an English classes now.( ) They often go h

7、ome 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.現(xiàn)在進行時 B.一般現(xiàn)在時 C.一般過去時,A,B,C,A,B,B,C,C,C,He is a teacher.,2. Kangk

8、ang comes from China.,3. I usually take the bus to work.,4.They are having classes.,5.Jane played the guitar last night.,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 t

9、hey having classes? They arent having classes.,Did Jane play the guitar last night? Jane didnt play the guitar last night.,先變一般疑問句再變否定句,用所給動詞的適當形式填空。,1. Listen! She _ ( sing) now. 2. The man _ (run) along the street now. 3. My mother _(watch) TV play every day. 4. Old Bush _(visit) China again last

10、month.,is singing,is running,watches,visited,中考鏈接,1.-What do you do? -Im an engineer.I_in a company in Wuhan. A. work B. had worked C.will work D.worked 2.-Alice,turn down the TV, please.I_ on the phone. -Oh, Im sorry. A. have talked B. talked C. am talking D.talk,中考鏈接,3.Karin found some waste paper

11、 on the floor. She _ it _ and threw it into the dustbin. A. put ; up B. picked ; up C. turned ; up D. looked ; up 4.Today is Fathers Day. My mother _ a special dinner for my grandpa now. A. prepare B. prepared C. is preparing D. will prepred,中考鏈接,5.-_ the girls _you a warm welcome? -Yes, they did. A. Did ; give B. Do ; give C. Did ;