1、Welcome to Unit 1past and present現(xiàn)在完成時,(2),Task 1. Acting A:_ you _ (see ) any exhibitions recently ? B:No,I _.What about you ? A:Well,I _ (see) one .I _ (see ) it at the history museum last week . B:Whats it about ? A:I _ (forget ) the title.Its about changes in Jianhu over the past century .,Have,

2、seen,havent,have seen,saw,have forgotten,Task 2 現(xiàn)在完成時的構(gòu)成,現(xiàn)在完成時由： “助動詞have(has) +過去分詞”構(gòu)成。 過去分詞構(gòu)成方法； 一，規(guī)則動詞過去分詞構(gòu)成方法（四種） （同過去式方法一樣） 1,一般直接加ed,2,以e結(jié)尾加d,3,以輔音字母+y變y為i再加ed,4,雙寫加 ed 二,不規(guī)則動詞過去分詞構(gòu)成方法 (見121表),Task 3 Filling (過去分詞) 1.規(guī)則變化. (1) visit _ (2) move_ (3)study _ (4) stay _ (5)plan_ 2.不規(guī)則變化 (1)be _ ea

3、t _ fall_ (2)write _ forget _ ride _ (3)know _ throw _ grow _ break_ give _ take _ see _ (4)make _ sit _ stand _ say _ tell _ keep _ sleep _ smell _ (5) sing _ begin _ swim_ ring _,visited,moved,studied,stayed,planned,been,eaten,fallen,written,forgotten,ridden,known,thrown,grown,broken,given,taken,s

4、een,made sat stood said,told kept slept smelt,sung begun swum rung,Present perfect tense 現(xiàn)在完成時,構(gòu)成: 用法一：,表示過去發(fā)生的某一動作對現(xiàn)在造成的影響或產(chǎn)生的結(jié)果.現(xiàn)在完成時這一時態(tài)強(qiáng)調(diào)是過去動作與現(xiàn)在的聯(lián)系,也就是強(qiáng)調(diào)現(xiàn)在的影響和結(jié)果.,have/has + 過去分詞,用法二： for+段時間 since+點(diǎn)時間 since+句子（過去時） E.g. Kate has lived here for 3 years. Kate has lived here since 3 years ago. Ka

5、te has lived here since she came to China.,表示過去某個時間開始的動作或存在的狀態(tài)，一直持續(xù)到現(xiàn)在并可能還將持續(xù)下去。動詞使用延續(xù)性動詞。常與for或since引導(dǎo)的時間連用,Task 4 翻譯句子: 1.他們自從在小時候就認(rèn)識了. 2.他已經(jīng)看過很多大片. 3.自1998年以來,他一直在香港. 4.這塊空地已經(jīng)變成了一個漂亮的花園.,This open space has become a pretty garden.,He has been in HongKong since 1998.,He has watched many great film

6、s.,They have known each other since they were children.,This open space has turned into a pretty garden .,時間狀語 (提示詞) already已經(jīng)（肯）, just剛（肯), yet,(否.問) 還沒有， ever曾經(jīng)(問), never(否)從不, before以前, recently最近, for計(jì)+時間段, since自以來+時間點(diǎn)(或一般過去時的句子) until now直到現(xiàn)在, so far(到目前/現(xiàn)在為止), over the past few/20 years,近期間，a

7、ll ones life 一生, 次數(shù):once ,twice,three times）,Task 5 Explaining Open your booksat page 16. Lets study the table( ). And see some examples,表格,1. Have you done your homework_? ( for, just, yet) 2. I have_ been to Chengdu. (ever, never, yet) 3. He has_ washed the dishes. (already, ever, for)4. He has wo

8、rked there_ he left school. (already, just, since) 5. Have you cleaned your room_? ( for, just, yet),6. She has known Sam_ nine years. ( for, never, since) 7. They have_ arrived. (ever, just, yet) 8. Have you_ ridden a horse? (ever, for, yet) 9. She has known Fred_ they were at primary school. (alre

9、ady, just, since) 10. We have not completed the project_. (already, for, yet),翻譯句子 1. 我最近住在學(xué)校.(recently) 2. 他剛剛來這學(xué)校.(just) 3.我在這學(xué)校學(xué)習(xí)二年了.(for two years) 4.自從2005年我就在這學(xué)校學(xué)習(xí).(since 2005) 5.自從二年前我就在這校學(xué)習(xí)了.(since two years ago),I have lived in this school recently.,I have just come to this school 。,I have studied in this school for two years.,I have studied in this school since 2005.,I have studied in this school since t