Section A-2 (3).ppt

1、，英语教学课件系列，Go，for，it！8年级(下)，单元8 have you read treasure island yet？Section A Grammar Focus，当前时态present perfect，Grammar Focus，当前完成时：指示过去发生或完成的行为对当前的影响或结果，或从过去到当前的行为或保留状态。结构：主语have/has动词的科举分词，一般疑问句：have/has？Yes、I have.no、I havent.yes、she has.no、she hasnt。1 .现在完成的时候动词构成have /has v科举分词，辅助动词，否定Has he？经常与ju

2、st、already、yet、ever、never、before和several times一起使用：Already、never、ever、just和before，2 .从过去到现在的动作或状态，经常与for或since引起的一段时间副词一起使用。动词配置：have/has v科举分词，have breakfast，I have just had my breakfast。(我现在不饿)，im not hungry now，Mover I have lived here for three years，I have lived here since 2004/three years ago。n

3、ow、past、2 1)I have studied English since last year。我从去年开始学英语。2)she has lived in Beijing for five years。她北京市生活5年了。 come、go、leave、arrive、buy、lose、receive、join、die、bury、marry等动词所表示的动作是暂时性的，不能持续，因此不能与fool一起使用，但是牙齿单词是否定的也就是说，不发生动作是可以持续的。 * he has come to Beijing for two years。* he has bought that book fo

4、r three weeks。* he has joined the army for one and a half years His grandma has died for nine months .* I have received his letter for a month。可以说是： he has been in Beijing for two years . he has had that book for three weeks . he has been in the ars Or one and a half years . his grandma has been dea

5、s或：it is two years since he came to Beijing . it is three weeks since he bought that book . it is one and a half years since he joined the army。Nine months since his grandma died。3 .现在完成时将科举动作和当前结果联系起来，通常科举时间仅限于表示科举动作本身，与当前结果无关。现在完成时和一般科举时的意义差异如下。I have cleaned my room。(my room is clean now .)我已经打扫了

6、我的房间。I cleaned my room last week。(I did it in the past .)我上周打扫了我的房间。Father has gone to amoy。(he went to amoy and he is not here now .)爸爸厦门市去了。They have bought a dictionary。(they bought a dictionary and they have it now .)他们买了一本字典。牙齿完成时可与明确表示时间的副词(如： yesterday、last、year、in 1976、two days ago、just now、

7、when shecame in等)一起使用与Ever、never、sometimes、always、often、before、once、twice、recently、lately等一起使用；也可以与时间副词(Today、This Morning、This Week、This Year等)一起使用，包括现在。(1)。表示for调度周期的语法(2)。表示since科举时间点的单词(3)。since表示科举时间的时间状语子句，eg . I have been a teacher _ _ _ _ _ a year . he has been at this school _ _ _ _ _ _ 199

8、2 . we have、ever、just、already、yet、e.g. have you _ _ _ _ _ been to Japan？I have _ _ _ _ _ finished my homework . I have finished my homework _ _ _ _ _。I havent finished my homework Yet“至今”这两个副词经常用于完成时态。其中already经常用于肯定语句，yet经常用于否定句和疑问句。例如： Jim has already finished his work . Jim已经完成了他的工作。Mother hasnt

9、come home yet。妈妈还没回来。havent you read the call of the wild yet？你还没读野性的呼唤吗？She has already finished her work。她已经完成了工作。I havent read the story yet。我还没有读牙齿故事。Have you met him before？你以前见过他吗？lily has always been a good student . lily一直是个好学生。比较：I have seen him this morning。我上午看见他了。(说话的时候上午)I saw him this

10、morning。今天上午我见到了他。It has been cold this winter。今天冬天一直很冷。(说话的时候还是冬天)，4 .现在完成的时候和现在完成的时候都可以表示“从过去持续到现在”的概念，有时可以徐璐代替两者，但是前者多用于口语用途。在现在完成的时候多用，比如强调动作的结果。(威廉莎士比亚，温斯顿，动作名言)强调动作继续进行，即有动作的连续性时，现在完成时常用。一般不能用于进行的动词也不能在目前完成时行时使用。当前完成时：表示过去发生或完成的动作对当前的影响或结果，或从过去到现在的动作或保存的状态，强调当前情况，不能与表示过去的时间状语(例如in 1990、last Su

11、nday等)一起使用。通常是科举：通常过去只表示过去的动作或状态，与现在无关(即动作或状态现在已经结束)。这可以和表示过去的时间副词一起使用。当前完成时间和一般科举时间之间的差异：have/has V科举喷射，I have waited for him for many times。我等了他很多次。I have been waiting for him for an hour。我等了他一个小时。He has drunk six cups of coffee。他喝了6杯咖啡。He has been drinking coffee。他在喝咖啡。，重写句子，1 .my father came bac

12、k from the bookshop just now . my father _ _ _ _ _ _ just _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _the film began two minutes ago . the film _ _ _ _ _ _ _ _ s . its two years _ _ _ _ _ _ _ he _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _(just/(find)B: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _。(a

13、lready/leave)，4a.use to。(leave)b : this morning . 4 . a : is your sis ter going to the movies with us tonight？B:No。_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _。(al ready b 3360 I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _)(not/tellthem/yet)，sally _ _ _ _ _ _ _ _(love)reading . in the morning，she reads th