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1、现在完成时,Revision The Present Perfect Tense,现在完成时谓语动词的构成：,1. I _(finish) homework already.,2. He _(learn) English for three years.,I/ We/You/ They have ,He/She/It has ,have finished,has learned,助动词have/has +pp（过去分词）,句式变换：,1. He has finished his homework.(变为否定句） 2. They have visited China before.(变为一般疑问
2、句，并做肯定回答）,He hasnt finished his homework.,Have they visited China before? Yes, they have.,1.现在完成时的第一种用法是什么？ 2.常用的时间状语有哪些？ 3.你能说出already 和yet 有哪些不同吗？,想一想,现在完成时(一),1.表示过去发生的动作对现在造成的影响和结果. 2.时间状语: already, yet, ever,never,just,before等 3.already 和 yet 的区别 already 多用于肯定句；yet多用于否定句和疑问句末。,注意：如果肯定句中含有alread
3、y或just ，在变成否定句或疑问句时，要把句中的already 或just 转换成yet.,I havent seen the film yet.,2.I have already finished my homework.,Have you finished your homework yet?,3. Mother has just cleaned the house.,Mother hasnt cleaned the house yet.,1. I have already seen the film.,1.I _ (do) my homework already. 2.He _(not
4、 finish) his homework yet. 3.We _ never _ (see) this book before. 4.Mother _ just _(clean) the house. 5.Sally _(visit) China before.,have done,has not finished,have,seen,has,cleaned,has visited,我能行,用动词的适当形式填空：,现在完成时(二),1.现在完成时的第二种用法是什么？ 2.常用的时间状语有哪些？ 3.你能说出for 和since有什么不 同吗？,现在完成时(二) 1.表示过去发生的动作,一直延
5、续到现在, 并且有可能继续延续下去. 2.时间状语: 通常和for, since 引导的时间状语连用.,1.for + 一段时间,for a week, for 3 years, for a long time, 2. since +时间起点 since+一段时间+ago since+从句(一般过去时) since 2 oclock, since yesterday, since3 years ago, since I came here等 .,注意: 对for或since引导的时间状语提问 必须用_,1. I have lived here for 10 years.,How long ha
6、ve you lived here?,2. She has been here since 2 hours ago.,How long has she been here?,how long,选用for和since填空: 1.We havent seen each other _ a long time. 2.His father has been in the Party _ 10 years ago. 3.The film has been on _ 20 minutes. 4.Mr Green has worked here _ he came to China. 5.His grand
7、pa has been dead _ several years.,for,since,for,since,for,注意：在现在完成时的肯定句中， 动词不能和for, since 引导的时间状语连用。要连用必须改成延续性动词,最常见的有： buy-have, borrow-keep, leave-be away (from) die-be dead, come-be here/be in join-be in /a member of begin/start-be on,非延续性,举例： 1.我买了这本书五年了。 2.这位老人已经死了十年了。,I have bought this book f
8、or five years. I have had this book for five years.,The old man has died for ten years. The old man has been dead for ten years.,( F ),( F ),( T ),( T ),have been to 曾经去过某地（已返回） have gone to 去了某地 （还没有回来）,A,B,A,B,巧记：been to ，gone to 意不同，两者用法要记清； have been to + 地名，曾经到过某地方； have gone to + 地点，到某地去了或已走远。
9、,1.I have gone to Japan before. ( ) 2.Guilin is very beautiful, I have been to there twice. ( ) 3.His father has gone to Beijing .He will be back next week( ) 4.Where have you gone?( ),True or false?,F,F,F,T,been,been,你能说出一般过去时和现在完成时的区别吗？,一般过去时与现在完成时有一些明显的时间状语。 1.yesterday, last year, in+过去某一年，two d
10、ays ago, just now等常用于一般过去时 2. already, yet, ever, never, just, before, so far, in the past/ last few years(在过去/最近的几年里)，for+一段时间，since+时间起点等常用现在完成时,当堂检测 一、句式变换：（5分,每空1分） 1. Jack has visited China before.(改为否定句） Jack visited China before. 2. They have come into the classroom.(改为一般疑问句） come into the cl
11、assroom? 3. He has been here for 12 years.(划线提问） has he been here?,hasnt,Have they,How long,二、用所给词的正确形式填空: （3分，每空1分） 1. I （live）here for ten years . 2. I （live）here in 1998. 3. He (not return) the book yet. 三、判断正误：(2分，每题1分) 1.他爷爷已经去世三年了。 His grandpa has died for 3 years.( ) 2. 他去过北京。 He has gone to Beijing. ( ),has lived,lived,hasnt returned,F,F,Writing,写一段短文，用现在完成时描述自己的一次经历。（不少于60字）,Bye-bye!,Thank you,