现代新理念英语初中捷进语法4第一课课件.ppt

现在完成时态,捷进初中4 Lesson 1,时态,不同时间发生的动作，动词要用不同形式,was/were+v-ing,1.v原形 2.v+s/es（三单现）,已学习过的时态,am/is/are+v-ing,1.will/shall+v原形2.am/is/are going to+v原形,1.v-ed（规则动词）2.不规则动词,1.was/were+现在分词,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 Sunday.4.They held a sports meeting last week.5.Are you helping your mother.,一般现在时,过去进行时,一般将来时,一般过去时,现在进行时,判断下列句子的时态,情景创设。情景1class，Look at me carefully!(我把门打开)-I opened the door just now.(看门现在的状态)-The door is open now.把这两个句子用一句话表达：-I haveopened the door.,情景2 让一个学生走出教室-Wang Ning left the classroom.现在的状态-Wang Ning isnt in the classroom.-Wang Ning has left the classroom.,情景3我把黑板擦干净。-I cleaned the blackboard a moment ago.-The blackboard is clean now.-I have cleaned the blackboard.（通过三个情景，让学生观察三个句子间的联系，自己总结完成时用法一的概念，然后总结出完成时的构成。根据情景，学生更能加深对过去发生的动作与现在有联系，用现在完成时。）,现在完成时,含义：过去发生的动作对现在造成的影响或结果。,动词构成：have/has+v过去分词,have breakfast,I have just had my breakfast.,(现在我不饿),Im not hungry now,moved herein 2000,I still live here,have/has+v 过去分词,助动词,否定,haventhasnt,疑问,Have you?Has he?,现在完成时的结构形式：,动词的过去分词形式,1.规则动词:2.不规则动词:,talk-talked-talkedmove-moved-movedcarry-carried-carriedstopstopped-stopped,AAA型：putput-putABB型：meetmet-metABA型：runran-run ABC型：singsang-sung,动词过去分词1.动词的过去分词与其过去式相同，即在动词原形后加-ed或-d构成，如动词以y结尾，变y为i，再加-ed。例如：动词原形 过去式 过去分词work worked workedarrive arrived arrivedstudy studied studiedstop stopped stopped,2.不规则动词的过去分词有其特殊形式，例如：动词原形 过去式 过去分词put put put cut cut cutshut shut shut,2.不规则动词的过去分词有其特殊形式，例如：动词原形 过去式 过去分词meet met met tell told toldsay said said find found found,2.不规则动词的过去分词有其特殊形式，例如：动词原形 过去式 过去分词run ran run come came comebecome became become,2.不规则动词的过去分词有其特殊形式，例如：动词原形 过去式 过去分词Sing sang sungsee saw seengive gave given do did done,Task:Do Ex.1.on Page 1,现在完成时的时间标志,（1）already和yet already一般用于肯定句中，yet一般用于否定句和疑问句中。(2)表示到说话为止的过去时间状语，如just，now等。,肯否问答,finish,homework,I have finished my homework.,He has finished his homework,havent,Has he,Yes,he has,No,he hasnt,不能是具体过去时间,Pay attention 注意,1.现在完成时句中常见的时间状语 A.表示从过去一直持续到现在,不能是具体过去时间,(1).for+表示一段时间的短语(2).since+表示过去时间点的词语(3).since+表示过去时间的时间状语从句,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 有此类副词时,常强调动作完成,不强调动作的持续.,e.g.I have _ finished my homework.I have finished my homework _.I havent finished my homework _.,just,already,yet,注意：当在肯定陈述句中含有already或just 时，在转换成否定句或疑问句时，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 cleaned the house yet.,I have seen the film already.,Task:Do Ex.2.on Page 1,现在完成时与一般过去时的区别：,一般过去时表示发生在过去的动作，和现在无关；I opened the door just now.(过去开过门，不知现在门是否开着）现在完成时则强调某一发生在过去的动作与现在的关系，如对现在产生的结果或影响等。I have opened the door.（过去开过门，现在门仍开着）,Liu Xiang has won a gold medalin the Olympic Games.,Liu 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,一般过去时与现在完成时有一些明显的时间状语。,遇到yesterday,Last year,in May,in+过去某一年，two days ago,the other day,just now等就用一般过去时,当有 already,yet,just等常用现在完成时,现在完成时和一般过去时,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).,用所给动词的适当形式填空:,went,do do,am,drinking,hasnt had,are going to see,cooks,is cooking,was reading,happened,Task:Do Exes.3-4.on Page 2,总结,现在完成时态的构成：have/has+过去分词现在完成时与一般过去时的区别：现在完成时与现在有关系；一般过去时与现在无关系。,作业,复习现在完成时的用法。整理做错的题，记载入错题集。,Thank you Bye-bye!,