,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,单击此处编辑母版标题样式,*,Unit 1,Past and present,Unit 1,1,GrammarPresent perfect tense,学科网，,zxxk.fenghuangxueyi,Grammar学科网，zxxk.fenghuangxueyi,2,Answer some questions about the conversation between Mr Chen and Millie.,Revision,Model 1:,Has Sunshine Town changed a lot?,Yes,it has.,Model 2:,Have Mr Chen and his wife moved out of the town?,No,they havent.,Answer some questions about th,3,Questions:,1.Has the government built a new,park?,2.Have most of Mr Chens old,friends moved away?,3.Has it become impossible for them,to see each other as often as before?,Yes,it has.,Yes,they have.,Yes,it has.,Questions:1.Has the governmen,4,The Present Perfect Tense,（现在完成时）,1.We use the present perfect tense to talk,about an action that started in the past,and continues to the present.,e.g.,I,have lived,here since I was born.,She,has worked,in this factory for,nine years.,The Present Perfect Tense1.We,5,2.We use the present perfect tense to talk,about an action that happened in the past,and have a connection with the present.,e.g.,Eddie,has,just,eaten,Hobos food.,(Eddie ate the food,and now Hobo has,nothing to eat.),I have,already,seen,the film?,(I saw the film in the past and now I still,remember something about the film.),学科网，,zxxk.fenghuangxueyi,2.We use the present perfect,6,3.We also use the present perfect tense to,talk about how many times an action,has happened till now.,e.g.,I,have,already,read,this book many,times.,Mr Chen,has been,to the USA,twice.,3.We also use the present per,7,I/You/We/They,have,arrived,.,He/She/It,has,4.We make positive statements in the,present perfect tense like this:,I/You/We/They have arriv,8,5.We make negative statements in,the present perfect tense like this:,I/You/We/They,have,not,arrived,.,He/She/It,has,have not=havent,has not=hasnt,5.We make negative statements,9,6.We ask and answer questions using the,present perfect tense like this:,Have,I/you/we/they,arrived,?,Has,he/she/it,Yes,I/you/we/they,have,.,he/she/it,has,.,No,I/you/we/they,havent,.,he/she/it,hasnt,.,6.We ask and answer questions,10,7.We form the past participles of,regular verbs by adding-ed,just as,what we do to form the simple past,tense of these verbs.,7.We form the past participle,11,Most verbs,+ed,finish,finish,ed,Verbs ending in-e,+d,change,change,d,Verbs ending in a consonant+y,-y+ied,carry,carr,ied,Short verbs ending in a vowel+a consonant,double the consonant+ed,stop,stop,ped,Most verbs+edfinish finishe,12,8.We form the past participles of,irregular verbs differently.Here,are some examples.,8.We form the past participle,13,No change,come,come hurt,hurt,Change the vowel,hold,held win,won,Change the consonant,lend,lent build,built,Change the vowel(s)and the consonant(s),catch,caught keep,kept forget,forgotten,tell,told,Others,be,been have,had,fall,fallen fly,flown,draw,drawn,see,seen,No changecomecome hurt hurt,14,The following shows more examples of the past participles of some verbs.,visit,repair,live,move,try,study,fit,plan,visit,ed,repair,ed,live,d,move,d,tr,ied,stud,ied,fit,ted,plan,ned,Base form Past participle,Base form Past participle,hit,put,meet,make,sell,give,write,think,hit,put,m,e,t,ma,d,e,s,o,ld,give,n,wr,itten,th,ought,The following shows more examp,15,A short test,Write the past participles of the verbs below.,borrow plan say,hope cry grow,make send hit,get watch enjoy,borrowed,hoped,made,gotten,planned,cried,sent,watched,said,grown,hit,enjoyed,A short testWrite the past par,16,Complete the sentences below using the present perfect tense.,1.They _(finish)their,homework already.,2.John _ never _(visit)China.,3.Mr Li _(repair)over ten,bicycles since Monday.,4.We _(not see)each other for years.,have finished,has visited,has repaired,havent seen,Complete the sentences below u,17,5.My parents _(not come),back yet.,6.Our teacher _(teach)us,a lot about the history of China.,havent come,has taught,5.My parents _(n,18,Complete the conversation.Use the correct form of the verbs in brackets.,Millie:_ you _(see)any films,recently,Sandy?,Sandy:No,I havent.What about you?,Millie:I _(see)one last Saturday.,Sandy:Whats it about?,Have seen,saw,Complete the conversation.Use,19,Millie:Its about the changes in Beijing,over the past century.From this,film,I _(learn),more about Beijings past and,present.,Sandy:Oh,I think I _(hear),about the film.Do you plan to see,it again?,Millie:Yes,Id like to.,have learnt,have heard,Millie:Its about the changes,20,一、现在完成时的构成：,1.,现在完成时的肯定句句型：,主语,+have/has+,过去分词,e.g.,He,has lived,in Beijing,for ten years,.,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.,I,have not seen,the movie yet.,He,hasnt been,to Beijing since then.,语法小结,一、现在完成时的构成：语法小结,21,3.,现在完成时一般疑问句的构成：,Have/Has+,主语,+,过去分词,?,Yes,主语,+have/has.,No,主语,+havent/hasnt.,e.g.,Have you finished your homework yet?,Yes,I have./No,I havent.,havent=have not hasnt=has not,Ive=I have Hes=He has,3.现在完成时一般疑问句的构成：havent=h,22,二、用法：以下两种情况应用现在完成时,1.,过去发生的动作或状态一直持续