一般过去时与现在完成时.ppt

Grammar,现在完成时态,现在完成时,主菜单,上一页,下一页,现在完成时的构成,现在完成时的主要用法,现在完成时的时间状语,与一般过去时的用法比较,现在完成时态的基本句型,现在完成时的构成,主菜单,上一页,下一页,助动词have (has）+ 过去分词,过去分词的构成,上一页,下一页,ABB,AAA,ABC,主菜单,现在完成时的主要用法,一.表示过去发生或已完成的某一动作对现在造成的影响和结果。,上一页,下一页,He has just turned off the light. (他刚把灯关了。) 相当于：He turned off the light just now. The light isnt on now. 即关灯这一动作对现在造成的结果和影响：现在灯不亮了。,I have already finished my homework. (我已经完成了家庭作业。),主菜单,二.表示从过去某一时刻开始并一直延 续到现在的动作或状态,但动作或状态可能仍在继续。,上一页,下一页,She has lived here since she was born. 自从她出生时就一直住在这儿。,I have learnt English for more than ten years.我已经学了10多年的英语。,现在完成时的主要用法,主菜单,三.表示人曾有过或到目前为止从未有过的经历.,上一页,下一页,Have you ever been to the Summer Palace? (你曾去过颐和园吗?),I have never had a car. (我从未有过汽车。),现在完成时的主要用法,主菜单,现在完成时的时间状语,常与不确定的时间状语连用，如:already, never, ever, just, yet, before, so far, in the past few years等,表示“到目前为止”所发生的动作. 还可以和表示一段时间的状语连用， since, for a long time等.,上一页,下一页,主菜单, 一、since Mr. Smith has worked here since 1984. （1984年以来，史密斯先生一直在这工作。） I have known Daniel since 7 years ago. 自从7年前我就认识丹尼尔。 Hes learned about 500 words since he went to college.（他上大学以来大约学了五千个英语单词）,上一页,下一页,主菜单,二、for一段时间 （two weeks/six months/five days）for短语表示动作延续多长时间 。 He has taught in this school for four years. （我们认识有二十年了。） I havent seen her for a long time. （我好久没有见到她了。）,上一页,下一页,主菜单,三、just, already, ever， recently，before, never是完成时态的时间状语，而just now /a moment ago 是一般过去时的时间状语。 The train has just arrived. （火车刚到。） Did you see Joan just now? （你刚才看到琼了吗？） Have you heard from your family recently? （你最近收到家人的来信了吗？）,上一页,下一页,主菜单,have been 与have gone 的用法比较,have been to 意思是“到过，去过”，表示曾经到过某处，但现在人不在那儿。 have gone to 意思是“去了”，表示已经去了某地，现在人可能在去的途中或已在那儿了。,上一页,下一页,主菜单,Has she ever been to Nanjing? 她曾去过南京吗？ You have never been there, have you? 你以前从未去过那儿，是吗？ -Where is she? -She has gone to Nanjing. 她已经去南京了。,上一页,下一页,主菜单,与一般过去时的用法比较,一.一般过去时表示过去发生的动作或单纯叙述过去的事情，强调动作发生在过去，和现在没有关系，而现在完成时是表过去发生的某一动作对现在造成的影响或结果，强调的是现在的情况。,上一页,下一页,主菜单,二.一般过去时常与具体的时间状语连用，现在完成时通常与模糊的时间状语连用，或无时间状语。 1.一般过去时的时间状语有: yesterday ,last week,一段时间ago, in 1980（过去时间）, in October ,just now, a moment ago.,上一页,下一页,主菜单,eg: The plane took off ten minutes ago.,We finished our task last week .,2.现在完成时的时间状语： for, since, ever,just,yet,already等不确定的时间状语。,上一页,下一页,主菜单,eg: They have lived here for ten years.,eg: She has been in the Reading Club for many years .,eg: I have known Daniel since ten years ago.,eg：He has bought an English-Chinese dictionary. 他已经买了一本英汉字典。 He bought an English-Chinese dictionary. 他曾买过一本英汉字典。,上一页,下一页, 第一句用现在完成时时态，意为：“He bought an English-Chinese dictionary. And he still has it” “过去他买了一本英汉字典，现在他还有这本字典” 。,第二句用过去时只叙述过去他买过一本英汉字典这一事实，至于现在他是否有这本字典并未强 调说明。,主菜单,陈述句肯定形式。主语+ have/has+ 过去分词+其它 e.g. I have had lunch. 已经吃过午饭了。 He has gone to Beijing. 他去北京了。 陈述句否定形式。主语+ have/has+ not+过去分词+ （在助动词have/has后+not，可缩写为havent/hasnt） e.g. I havent had lunch. 我还没吃午饭 He hasnt gone to Beijing. 他还没有去北京。,上一页,下一页,主菜单, 现在完成时的基本句型,一般疑问句形式及其答语。Have/Has+主语过去分词 （将助动词have/has提前，句末加问号） 肯定回答：Yes , 主语 have/has. 否定回答：No , 主语 havent/hasnt. Has he gone to Beijing? 他去过北京了吗？ Yes, he has ./ No, he hasnt. 特殊疑问句形式。（疑问词+一般疑问句） 特词+ have/has+主语过去分词？ e.g. Where has he gone? 他去了哪里？,上一页,下一页,主菜单,上一页,现在完成时练习,主菜单,动 词 填 空： 1._ you already_ (clean) the room? Yes, we _(do) that already. When _ you _(do) it? We _(do) it an hour ago. 2._ he _(see) this film yet? Yes. When _ he _(see) it? He _ it last week. 3. _you ever _(be) there many times?,Have,cleaned,have done,did,do,did,Has,seen,did,see,saw,Have,been,下一页,上一页,主菜单,4. I _ (read) the novel twice. Its interesting. 5. She _(go) to Pairs, hasnt she? Yes. 6. How _ she _(go) there yesterday? She _(go) there by air.,have read,has gone,did,go,went,下一页,上一页,主菜单,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 bee