1、現(xiàn)在完成時態(tài),捷進初中4 Lesson 1,時態(tài),不同時間發(fā)生的動作，動詞要用不同形式,was/were+v-ing,1.v原形 2.v+s/es（三單現(xiàn)）,已學(xué)習(xí)過的時態(tài),am/is/are+v-ing,1.will/shall+v原形 2.am/is/are going to +v原形,1.v-ed（規(guī)則動詞） 2.不規(guī)則動詞,1.was/were +現(xiàn)在分詞,1.She works in a factory. 2.I was doing my homework at this time yesterday. 3.We are going to have a picnic this Sun

2、day. 4.They held a sports meeting last week. 5.Are you helping your mother .,一般現(xiàn)在時,過去進行時,一般將來時,一般過去時,現(xiàn)在進行時,判斷下列句子的時態(tài),情景創(chuàng)設(shè)。 情景1 class， Look at me carefully! (我把門打開)- I opened the door just now. (看門現(xiàn)在的狀態(tài))-The door is open now. 把這兩個句子用一句話表達： - I haveopened the door.,情景2 讓一個學(xué)生走出教室 -Wang Ning left the cl

3、assroom. 現(xiàn)在的狀態(tài) - Wang Ning isnt in the classroom. -Wang Ning has left the classroom.,情景3 我把黑板擦干凈。 - I cleaned the blackboard a moment ago. -The blackboard is clean now. -I have cleaned the blackboard. （通過三個情景，讓學(xué)生觀察三個句子間的聯(lián)系，自己總結(jié)完成時用法一的概念，然后總結(jié)出完成時的構(gòu)成。根據(jù)情景，學(xué)生更能加深對過去發(fā)生的動作與現(xiàn)在有聯(lián)系，用現(xiàn)在完成時。）,現(xiàn)在完成時,含義：過去發(fā)生的動作

4、對現(xiàn)在造成的影響或結(jié)果。,動詞構(gòu)成：have/has+v過去分詞,have breakfast,I have just had my breakfast.,(現(xiàn)在我不餓),Im not hungry now,moved here in 2000,I still live here,have /has+v 過去分詞,助動詞,否定,havent hasnt,疑問,Have you? Has he?,現(xiàn)在完成時的結(jié)構(gòu)形式：,動詞的過去分詞形式,1.規(guī)則動詞: 2.不規(guī)則動詞:,talk-talked-talked move-moved-moved carry-carried-carried stop

5、stopped-stopped,AAA型：putput-put ABB型：meetmet-met ABA型：runran-run ABC型：singsang-sung,動詞過去分詞 1.動詞的過去分詞與其過去式相同，即在動詞原形后加-ed或-d構(gòu)成，如動詞以y結(jié)尾，變y為i，再加-ed。例如： 動詞原形 過去式 過去分詞 work worked worked arrive arrived arrived study studied studied stop stopped stopped,2.不規(guī)則動詞的過去分詞有其特殊形式，例如： 動詞原形 過去式 過去分詞 put put put cut

6、cut cut shut shut shut,2.不規(guī)則動詞的過去分詞有其特殊形式，例如： 動詞原形 過去式 過去分詞 meet met met tell told told say said said find found found,2.不規(guī)則動詞的過去分詞有其特殊形式，例如： 動詞原形 過去式 過去分詞 run ran run come came come become became become,2.不規(guī)則動詞的過去分詞有其特殊形式，例如： 動詞原形 過去式 過去分詞 Sing sang sung see saw seen give gave given do did done,Tas

7、k: Do Ex. 1. on Page 1,現(xiàn)在完成時的時間標(biāo)志,（1）already和yet already一般用于肯定句中，yet一般用于否定句和疑問句中。 (2) 表示到說話為止的過去時間狀語，如just，now等。,肯否問答,finish, homework,I have finished my homework.,He has finished his homework,havent,Has he,Yes,he has,No ,he hasnt,不能是具體過去時間,Pay attention 注意,1. 現(xiàn)在完成時句中常見的時間狀語 A.表示從過去一直持續(xù)到現(xiàn)在,不能是具體過去時間

8、,( 1).for+表示一段時間的短語 ( 2).since+表示過去時間點的詞語 ( 3).since+表示過去時間的時間狀語從句,I have been a teacher _ a year. He has been at this school _ 1992. We have learned 1,000 English words _ we came to this school.,for,since,since,e.g.,B. just, already, yet, now 有此類副詞時,常強調(diào)動作完成,不強調(diào)動作的持續(xù).,e.g. I have _ finished my homew

9、ork. I have finished my homework _. I havent finished my homework _.,just,already,yet,注意：當(dāng)在肯定陳述句中含有already或just 時，在轉(zhuǎn)換成否定句或疑問句時，要把句中的already 或just 去掉，在句末加上yet.,I havent seen the film yet., I have done my homework already.,I havent done my homework yet., Mother has just cleaned the house.,Mother hasnt

10、 cleaned the house yet., I have seen the film already.,Task: Do Ex. 2. on Page 1,現(xiàn)在完成時與一般過去時的區(qū)別：,一般過去時表示發(fā)生在過去的動作，和現(xiàn)在無關(guān)； I opened the door just now. (過去開過門， 不知現(xiàn)在門是否開著） 現(xiàn)在完成時則強調(diào)某一發(fā)生在過去的動作與現(xiàn)在的關(guān)系，如對現(xiàn)在產(chǎn)生的結(jié)果或影響等。 I have opened the door. （過去開過門，現(xiàn)在門仍開著）,Liu Xiang has won a gold medal in the Olympic Games.,L

11、iu Xiang went to France last week.,A: Look at the picture, who is he ? B: Hes Wang Zhizhi .A: He _ already _( become) a basketball star in China .A: But he _(play) basketball some years ago .,has,become,played,一般過去時與現(xiàn)在完成時有一些明顯的時間狀語。,遇到y(tǒng)esterday, Last year, in May, in+過去某一年，two days ago, the other da

12、y, just now等就用一般過去時,當(dāng)有 already, yet, just等常用現(xiàn)在完成時,現(xiàn)在完成時和一般過去時,He _(not work) in our school yet. He _(come) to our school last year/in 2002. They _(cook) the supper already. They _ (cook) the supper half an hour ago.,hasnt worked,came,have cooked,cooked,1. He_ (go) to America the year before last. 2. -What _ you _(do)? -I _ (be) a teacher. 3. Do you like _ (drink) milk? 4. He _ _(not have) his supper yet. 5. We _ (see) Uncle Li tomorrow. 6. Joans mother often _ at four, now she _(cook) 7. He _(read) a book when the accident _(happen).,用所給動詞的適當(dāng)形式填空:,went,do do,am,drinking,hasnt had,are