中考英语（人教新目标） 现在完成时的定义 复习课件

这是一份中考英语（人教新目标） 现在完成时的定义 复习课件，共17页。PPT课件主要包含了CONTENTS，Lead-in ，Practice，Summary，现在完成时用法1，现在完成时用法2，到目前为止，Ⅰ 等内容，欢迎下载使用。
2.Presentatin
present(nw)
表示过去发生或已经完成的某一动作对现在造成的影响或结果；表示动作或状态在过去已经开始，持续到现在，也许还要持续下去
1.过去发生的某一动作对现在造成的影响或结果； （常用的时间状语有already, yet, ever, never, just, befre等）
Presentatin
2.过去某一时间点发生的动作持续 到现在或还将持续下去。（通常和fr或since引导的时间状语连用）
The present perfect tense
助动词 （可以帮助构成肯定、疑问和否定句）
(过去分词规则变化方式同过去式，不规则变化见不规则动词表)
she、he、it等单三人称与has搭配；I、 yu、 they等非单三人称与have搭配。
否定句：主语+have/has+nt+过去分词+其他.
一般疑问句：Have/Has+主语+过去分词+其他.
简略答语: Yes, 主语 + have/has.(肯定) 　　　　　
N, 主语 + haven't/hasn't.(否定)
have nt=haven’t
has nt=hasn’t
1.常用的时间状语有already, yet, ever, never, just, befre s far ， in the past 10 years等
2.通常和fr或since引导的时间状语连用，和延续性动词连用。
A: ______ yur brther ______ his hmewrk yet? (finish)B: Yes, he 's already dne it.
Has finished
yet already
注意：already 用于肯定句， yet 用于疑问句和否定句中
A: _______ yu ever _______ t the park? ( be )B: N, never.
Have been
ever never
注意： ever 曾经 用于疑问句中 never 从不 带有否定意义
I ______ just ________ the desk, yu can take it t yur classrm . (mend )
have mended
Just 刚刚 与现在完成时连用 一般置句中Just nw 刚才 与一般过去时连用
Tm ___________ in the factry since he left schl ten years ag. (wrk )He __________ English fr 5 years.(teach)
has wrked
since fr
since + ①过去一个时间点　　 ②时段+ag　　 ③ It is+时段+since+从句（过去时）
has taught
fr+ 一段时间=since +时间点+ag
We _______ nly ____________ 100 trees s far. (plant ) He____________ 5000 wrds in the past 10years.( learn)
have planted
s far in the past 10 years
has learned
Excercise Chse the right answer .
1. A. 用 already或 yet 1) Have they taken dwn the ld pictures ___? N, they haven’t____. 2) Mst f us have finished ur cmpsitins___. 3) He said he hadn’t visited the exhibitin _____. B.用 since或 fr 1) We have learned five lessns ___ the beginning f this term. 2) Mrs Lia has been in hspital __ last week. 3) I have stayed at my aunt’s___ tw weeks.
Ⅱ 句型转换。1. Miss Ga has taught in the schl fr 5 years.(对画线部分提问) __________ has Miss Ga taught in the schl?2. I have already read the bk. ( 改为否定句) I __________read the bk ____.3. We have already cleaned the classrm.(改为一般疑问句) __________ yu __________ the classrm yet?4. This factry has been pen fr twenty years.(同义句) This factry has been pen ____twenty years____.5. He has wrked there since tw years ag.(同义句) He has wrked there ____ tw years .