牛津8BUnit1PastandPresentGrammar(A)课件.ppt
8BUnit 1 Past and Present,Grammar(A),Learning aims,1.To know the present perfect tense.2.To master the structure of the PPT.3.To learn the differences between the simple past tense and the present perfect tense.,1 Questions about Reading:,(1)How long has Mr.Chen lived in Sunshine Town?(2)When did Mr.Chen get married?(3)There have been many changes in this town.What has the centre of town become?(4)How does Mr.Chen feel from time to time?,He has lived in Sunshine Town since he was born.,In 1965,It has become a new park.,He feels a bit lonely.,Some more questions:,(1)How long have you lived in this town?(2)How long have you studied in this school?(3)How long have you studied English?(4)Where have you been recently?,The Present Perfect Tense,现在完成时态,The Present Perfect Tense,We use the simple past tense to talk about what happened at a definite time in the past.Past present Eddie was born four years ago.,We use the present perfect tense to talk about things that started in the past and still have some connection with the present.Eddie has lived with Millie since he was born.Eddie has lived with Millie for four years.,present,Past,Past,present,4 years,一、现在完成时的构成1.现在完成时的肯定句句型 主语（第一、二人称单、复数）+have 主语（第三人称复数）+have+过去分词 主语（第三人称单数）+has,We have lived in Beijing.He has lived in Beijing.I have finished my homework.,2.现在完成时的否定句句型 主语+have/has+not+过去分词+E.g.1)I have not seen the movie yet.2)He hasnt been to Beijing since then.,动词规则变化,1，大多数动词+ed finish finished visit repair2，以e结尾的动词+d change changed live move3，以辅音字母+y结尾-y+ied carry carried try study4，有些动词 双写最后一个字母+ed stop stopped fit plan,不规则过去分词的构成,上一页,下一页,ABB,AAA,ABC,Making sentencesMr.Wu asks the students to complete the sentences below using the present perfect tense.Help them complete the sentences.They_(finish)their homework.Mr.And Mrs.Li _(not come)back yet.John_(play)this computer game a few times.We _(not see)that film yetMr Dong _(repair)over ten bicycle since last Monday.You _(not visit)me for a long time.,have finished,havent come,has played,have not seen,Has repaired,have not visited,Check the answers:,3.现在完成时的一般疑问句句型 Have/Has+主语+过去分词+.Have you finished the work?Has she arrived here?4.现在完成时的特殊疑问句句型 特殊疑问词+have/has+主语+过去分词+.How many times have you been to the Great Wall?,Act the dialogue out.,用括号中动词的适当形式填空He(wait)for an hour.I(not finish)the work yet.you(know)him since then?I(hear)from my father recently.We(be)there many times in the past 3 years.The dog(die)since 3 days ago.They(finish)the work so far.How long you(stay)at home already?,has waited,havent finished,Have,known,have heard,have been,has been dead,have finished,have,stayed,Practice:,9.I(not read)the book before.10.He just(do)it.11.My sister(walk)to school every day last year.12.We(have)an exam again sometime next week.13.By 2000,we(plant)2000 trees.14.Lucy(go)to Shanghai.She(leave)this morning.15.Tom(buy)the bike for 2 years.,has,done,walked,will have,had planted,has gone,left,have bought,havent read,
