第一篇：现在完成时免费课件
英语中的语法是学习的重点也是难点，下面就是小编为您收集整理的现在完成时免费课件的相关文章，希望可以帮到您，如果你觉得不错的话可以分享给更多小伙伴哦！
现在完成时免费课件
谓语动词构成：I/we/you/they have worked;he/she/it has worked
(1)表示过去某一时刻发生，且延续到现在的动作或状态，这种情况常与表示一段的时间状语连用
We have lived here since last October.自从去年十月份我们就一直住在这儿。
She has studied English for 5 years.她学英语已有5年之久
(2)表示某个已经发生且对现在造成影响或结果的动作，这种情况常不与任何时间状语连用
I'm sorry I have lost my key.I can't open the door.对不起，我把钥匙弄丢了.门开不了了.She has left.If you want to see her, you'll have to come tomorrow.她已经走了.如果你想见她的话，你得明天再来一趟.英语学习—语法—现在完成进行时
谓语动词构成：I/ we/ you/ they have been working
He / she/ it has been working
(1)表示从过去某时开始一直持续到现在的动作，并且还将持续下去
The Chinese have been making paper for two thousand years.中国有2000年的造纸历史.I have been learning English since three years ago.自从三年前以来我一直在学英语.(2)表示在说话时刻之前刚刚结束的动作
We have been waiting for you for half an hour.我们已经等你半个钟头了.(3)有些现在完成进行时的句子等同于现在完成时的句子
They have been living in this city for ten years.They have lived in this city for ten years.他们在这个城市已经住了10年了.I have been working here for five years.I have worked here for five years.我在这里已经工作两年了.(4)大多数现在完成进行时的句子不等同于现在完成时的句子
I have been writing a book.（动作还将继续下去）我一直在写一本书.I have written a book.（动作已经完成）我已经写了一本书.(5)表示状态的动词不能用于现在完成进行时
I have known him for years.我认识他已经好几年了.这类不能用于现在完成进行时的动词还有：love爱，like喜欢，hate讨厌，等.英语学习—语法—一般将来时
谓语动词构成：I/ we shall work，he/ she/ it/ you/ they will work
will在陈述句中用于各人称，在疑问句中常用于第二人称
(1)表示将要发生的动作
Perhaps I shall play a visit to France this winter.我可能在今年冬天到法国观光。
Will you be at home at seven this evening? 今晚七点你会在家吗？
(2)“be going to +不定式”多用于口语中，表示打算、将要发生的事.What are you going to do tomorrow? 明天你要干什么？
Look at the dark clouds, there is going to be a storm.看那乌云，暴风雨快来了.(3)“be +不定式”表示安排或计划好了的动作
When are they to hand in their plan? 他们的计划什么时候交上来？
The queen is to visit Japan next year.女王将于明年访日.(4)“be about +不定式”表示即将发生的动作
He is about to retire.他即将退休.The English evening is about to begin.英语晚会即将开始.(5)come，go等动词用“一般现在时”表示按规定、计划或时间表将要发生的事
He starts next week.他下个星期出发.We leave very soon.我们很快就离开.(6)come，go等动词在口语中用“现在进行时”表示主语计划将要作的动作
They are leaving for New York tomorrow.明天他们将要动身前往纽约.Is your brother departing soon? 你的兄弟很快就要启程吗？
英语学习—语法—过去完成时
谓语动词构成：I/we/you/they had worked;he/she/it had worked
(1)表示过去某一时刻之前已经完成的动作，常与由by，before引导的时间状语连用
We had learned 5000 words by the end of last month.到上个月底为止我已经学了五千个单词.I had finished the composition before supper.晚饭前我就已经把作文写完了.(2)表示过去某一动作之前已经完成的动作，常与由when，before等连词引导的时间状语从句连用
When I woke up it had already stopped raining.我醒来的时候雨就已经停了.I hadn't learned any English before I came here.我来这儿之前没学过英语.(3)用于宾语从句或间接引语中
I wondered who had taken the umbrella without permission.我想知道谁不经允许就把雨伞拿去.He told me that he had passed the exam.他告诉我他已通过考试.(4)某些动词的过去完成时表示一个打算要做却没有做成的事.I had intended to come over to see you last night, but someone called and I couldn't get away.昨晚我本打算来看你，但有人来找，脱不开身.We had hoped to catch the early bus, but found it was gone.我们本来希望乘早班车，却发现车已开了.(5)用于表示与过去事实相反的虚拟条件从句中
If you had come yesterday, you would have met him.如果你昨天来的话，你就已经见到他的面了.She would have come if she hadn’t been so busy.要不是这么忙的话，她就已经来了.英语学习—语法—过去进行时
谓语动词构成：I/he/she/it was working;we/you/they were working
(1)表示过去某一时刻或过去某段时间内正在进行的动作，一般要有表示过去时间的状语
At that time she was working in Oxford.那时，她正在牛津大学工作.It was raining at 6 o'clock this morning.今天早晨六点钟天正下着雨.What were you doing when I phoned you last night? 昨晚我给你打电话时你在干什么？
(2)可用来表示由过去某时持续到另一时间的过去动作
He was studying in Cambridge between 1999 and 2001.在1999年和2001年那段时间，他在剑桥学习.From January to March I was traveling in Egypt.从3月份到4月份期间，我在埃及旅游.(3)表示故事发生的背景
It was a sunny morning.Some people were sitting on the riverbank.Some were walking with their dogs.Several boys were playing football nearby...一个阳光明媚的清晨.河堤上坐着几个人.有的人在溜狗.不远处有几个男童在踢足球...(4)与某些动词连用时，代替过去将来时
这类动词有 come来, go去, leave离开, start开始, stay逗留 等.主语必须是人.He telephoned me, saying that his aunt was coming to see me soon.他打电话给我，说他姨很快就要看我了.五、现在完成时
谓语动词构成：I/we/you/they have worked;he/she/it has worked
(1)表示过去某一时刻发生，且延续到现在的动作或状态，这种情况常与表示一段的时间状语连用
We have lived here since last October.自从去年十月份我们就一直住在这儿。
She has studied English for 5 years.她学英语已有5年之久
(2)表示某个已经发生且对现在造成影响或结果的动作，这种情况常不与任何时间状语连用
I'm sorry I have lost my key.I can't open the door.对不起，我把钥匙弄丢了.门开不了了.She has left.If you want to see her, you'll have to come tomorrow.她已经走了.如果你想见她的话，你得明天再来一趟.英语学习—语法—现在进行时
谓语动词构成：I am =I’m working , she/he/it is = he’s等 working, We/you/they are =We’re等working
(1)表示说话时正在进行或发生的动作
Please don’t make so much noise, I’m writing a composition.不要吵闹,我正在写作文.Let’s set off, it isn’t raining now.咱们出发把,现在天不下雨了.(2)有时通过上下问可以判断出应采用何种时态
Its four o’clock in the afternoon, the children are playing football on the sports ground.现在是下午4点,孩子们在操场上踢足球.(3)表示现阶段正在进行而说话时不一定在进行的动作
We are working in a factory these days.这几天我们在一家工厂工作.They are compiling a dictionary.他们在编一本词典.(4)在口语中表示主语计划将要做的动作
They are leaving for New York tomorrow.明天他们将要动身前往纽约.(5)现在进行时与always等副词连用时带有感情色彩
He's always quarrelling with others.他老喜欢跟别人吵架.She is constantly worrying about her son's health.她不停地为她儿子的健康担心着.The boy is forever asking questions.那个男孩老是提问问题.(6)有的现在进行时句子和一般现在时同义。用现在进行时表示问者的关切心情
How are you feeling today? 你今天感觉如何？
I am looking forward to your next visit.我盼望你下次再来.Why are you looking so sad? 为什么你看起来这么愁眉苦脸的样子呢？
(7)有的动词用于现在进行时表示“逐渐”的含义
Our study is becoming more interesting.我们的学习变得越来越有趣了.The leaves are turning red.树叶渐渐地变红了.Wait a moment，I am finishing my supper.等一会儿，我的晚饭就要吃完了.(8)“be”动词的现在进行时。“be”动词用于现在进行时表示说话者认为是短暂的、和平常不一样的、甚至是伪装的.He is being foolish.他在装傻.He is being honest.他表现得特别老实.I can't understand why he is being so selfish.我不明白此时他为何如此自私.
第二篇：现在完成时教学课件
现在完成时表示过去发生的动作对现在造成的影响或结果或表示过去的动作或状态持续到现在。为了方便老师们教学，分享了现在完成时的课件，一起来看看吧！
一．背景介绍
（一）教材分析：
本课为初三年级语法复习课，在已经复习完动词一般现在时，一般过去时，一般将来时，现在进行时和过去进行时的基础上，进行动词时态中最重要的现在完成时的复习。课时分配为两节讲练结合课和两节专项练习课。本课为讲练结合课的第一课时。
（二）学情分析：
学生在初二年级学习过现在完成时后，一直没有进行过系统的复习。在前阶段的语法复习中能够看出来学生的对于该语法项目遗忘程度比较严重。而现在完成时在中考中的地位较高，是单选的每年必考的项目，所以针对学生的现状和考试的要求，都要在该时态复习时下一番功夫。
二．教学设计
（一）教学目标
复习现在完成时的构成和两种基本用法。
现在完成时与一般过去时的区别。
have been to, have gone to和have been in的用法。
（二）教学重点：
现在完成时的两种基本用法。
（三）教学难点：
1.现在完成时与一般过去时的区别。
2.have been to, have gone to和have been in的用法。
三．课堂流程：
课题 现在完成时 课时 1课时 班级 3年5班
教学目标
1.复习现在完成时的构成和两种基本用法。
2.现在完成时与一般过去时的区别。
3.have been to, have gone to和have been in的用法。
教学重点 复习现在完成时的构成和两种基本用法。
教学难点
1.现在完成时与一般过去时的区别。
2.have been to, have gone to和have been in的用法。
教学内容
Step 1 warm up
Translate the following sentences
1.I have lived in Beijing.2.He has already seen the film.3.I have not had his lunch yet.4.She has not visited your school before.5.Have you ever been to the Forbidden City before ?
6.I have never been to that farm before.7.I have just lost my English book.Step 2 presentation
1.现在完成时构成主语+have / has + 过去分词+~
2.意义
1）现在完成时态表示 过去发生的动作对现在造成的影响或结果。
标志词：already ,yet , just, before, never ever
step 3 practice
1.A: ______ your brother _________ a new watch?(buy)
B: Not yet.1.提出问题，让学生进行小组讨论：
⑴ When is the Present Perfect Tense used？
⑵ What’s the difference between “have/has gone to” and “have/has been to”？
⑶ What kinds of words or phrases can be often used in the Present Perfect Tense ？
2.检查讨论情况并做典型题例。
此步骤目的在于引导学生进行小组合作，培养合作精神。
Step 4 Revise the difference between the two types of the tense（区别一般过去时与现在完成时）
1.先让学生做一些相关练习，让学生自己发现两种时态的区别并及时总结。
2.让学生举例说明。
此步骤的目的在于鼓励学生主动探究，调动他们学习的积极性和主动性。
Step 5 复习瞬间动词转化为延续动词
1.找错比赛：看谁找得快（做改错练习）。
2.让学生自己归纳总结瞬间动词转化为延续动词的用法。
初中阶段常见的终止性动词转化成延续性动词有：
borrow → keep buy → have
come to → be in（at）come back → be back
begin/start → be on join→ be in/be a member of
die → be dead become → be
leave → be away get to know → know
finish → be over fall asleep → be asleep
catch a cold → have a cold fall ill → be ill
come to work here → work here leave here → be away from here
turn…on/off → keep…on/off
规律： 除了borrow → keep buy → have 其余都可以转化为be +介词或副词或形容词。
口诀：
终止性动词一瞬间，不与时段紧相连。
来买发现停止参加开始变得死离开……
用时千万别胡来，记住要用别的动词来替代。
注：where 和when 引导的从句一般不用现在完成时，但Where have you been ？除外。
3.典型题例
此步骤目的在于鼓励学生积极参与，扩大学生的参与面。
Step 6 抢答竞赛游戏
利用学生的竞争心理，让学生以小组为单位进行组间竞赛，得分多者为胜，以此调动学生学习的积极性和兴趣，同时达到巩固现在完成时的目的。
练习I.用already，yet，ever，never，just填空
练习II.用for，since及how long填空
Step 7 语言实践，编情景会话
设置两个情景，让学生自选两人一组编一个对话，并且用上现在完成时态，将语法知识拓展运用到实际生活当中，引导学生主动探究实践，促进学生多方面能力的综合发展。
Step8： Homework
熟练掌握现在完成时的用法。
板书设计：
结构：have/has + p.p.（动词过去分词）
肯定句式：现在完成时的肯定句式是“have（has）＋过去分词”。
否定句式：现在完成时的否定句式是“haven't（hasn't）＋过去分词”。
疑问句式：现在完成时的一般疑问句式是把助动词have或has提到主语之前。
肯定回答用“Yes．．．have（has）．”。
否定回答用“No．．．haven't（hasn't）．”。
第三篇：现在完成时说课课件
现在完成时说课课件
（一）内容分析
现在完成时是课程标准要求学生重点掌握的语法项目，也是初中英语语法的重点和难点之一。语法现象较为复杂，难度较大，是中考重点考查的内容之一。
其考点主要体现在：
1.基本用法。
2.have gone to / have been to/ have been in 的区别。
3.延续性动词和费延续性动词在现在完成时中的应用。
4.现在完成时与一般过去时的区别。根据以上考点的分析和发展学生的综合运用语言的能力为宗旨制定一下教学目标
（二）教学目标：
1.知识与能力：通过复习使学生巩固现在完成时和一般过去时的有关知识，能够运用所学知识解决时态的题目。
2.过程与方法：通过复习提高学生综合运用所学知识解决问题的能力。
3.情感态度：通过复习使学生树立较强的自信心，形成克服困难的意志。
（三）教学重难点由于英语和汉语两种语言对
“完成”和“过去”概念定义的差异，学生往往对两种时态的含义和用法产生混淆，同时两种时态既有联系又有区别，因此，正确理解现在完成时和一般过去时的用法及区别，正确使用现在完成时和一般过去时解决有关时态的题目既是本节课的重点，又是本节课的难点。
二．教法学法分析
说教法：结合教材和复习课的特点，采用讲授和练习相结合的教学方法。精讲巧练，循序渐进地深化教学内容。展开以教师为主导，以学生为主体的师生双边活动。
说学法：结合教学内容，在课堂上指导学生使用了比较归纳、分析概括的方法，这样不仅有利于学生更好地从整体上理解和把握知识的结构和体系，更有利于发展学生求同辩异的思维能力，培养学生的自学能力。
三．教学过程分析
第一步：知识复习总结，首先分别复习现在完成时和一般过去时的有关知识，对重点进行分析并结合习题进行巩固，再对两种时态进行比较归纳，使学生从整体上理解和把握这两种时态的结构和体系。
第二步：知识点练习。结合历届中考试题中部分考查现在完成时和一般过去时的试题让学生在规定时间内完成。达到让学生熟练运用所学知识，培养学生运用所学知识解决问题的能力的目标。
第三步：知识点练习。结合历届中考试题中部分考查现在完成时和一般过去时的试题让学生在规定时间内完成。达到让学生熟练运用所学知识，培养学生运用所学知识解决问题的能力的目标。
四．教学反思
通过本节复习课，学生掌握了现在完成时的各种用法以及现在完成时和一般过去时的区别，能够运用所掌握的知识解决遇到的题目，效果较好。但由于时间关系练习量太少。
第四篇：现在完成时英语课件
英语学习—语法—现在完成时
谓语动词构成：I/we/you/they have worked;he/she/it has worked
(1)表示过去某一时刻发生，且延续到现在的动作或状态，这种情况常与表示一段的时间状语连用
We have lived here since last October.自从去年十月份我们就一直住在这儿。
She has studied English for 5 years.她学英语已有5年之久
(2)表示某个已经发生且对现在造成影响或结果的动作，这种情况常不与任何时间状语连用
I'm sorry I have lost my key.I can't open the door.对不起，我把钥匙弄丢了.门开不了了.She has left.If you want to see her, you'll have to come tomorrow.她已经走了.如果你想见她的话，你得明天再来一趟.英语学习—语法—现在完成进行时
谓语动词构成：I/ we/ you/ they have been working
He / she/ it has been working
(1)表示从过去某时开始一直持续到现在的动作，并且还将持续下去
The Chinese have been making paper for two thousand years.中国有2000年的造纸历史.I have been learning English since three years ago.自从三年前以来我一直在学英语.(2)表示在说话时刻之前刚刚结束的动作
We have been waiting for you for half an hour.我们已经等你半个钟头了.(3)有些现在完成进行时的句子等同于现在完成时的句子
They have been living in this city for ten years.They have lived in this city for ten years.他们在这个城市已经住了10年了.I have been working here for five years.I have worked here for five years.我在这里已经工作两年了.(4)大多数现在完成进行时的句子不等同于现在完成时的句子
I have been writing a book.（动作还将继续下去）我一直在写一本书.I have written a book.（动作已经完成）我已经写了一本书.(5)表示状态的动词不能用于现在完成进行时
I have known him for years.我认识他已经好几年了.这类不能用于现在完成进行时的动词还有：love爱，like喜欢，hate讨厌，等.英语学习—语法—一般将来时
谓语动词构成：I/ we shall work，he/ she/ it/ you/ they will work
will在陈述句中用于各人称，在疑问句中常用于第二人称
(1)表示将要发生的动作
Perhaps I shall play a visit to France this winter.我可能在今年冬天到法国观光。
Will you be at home at seven this evening? 今晚七点你会在家吗？
(2)“be going to +不定式”多用于口语中，表示打算、将要发生的事.What are you going to do tomorrow? 明天你要干什么？
Look at the dark clouds, there is going to be a storm.看那乌云，暴风雨快来了.(3)“be +不定式”表示安排或计划好了的动作
When are they to hand in their plan? 他们的计划什么时候交上来？
The queen is to visit Japan next year.女王将于明年访日.(4)“be about +不定式”表示即将发生的动作
He is about to retire.他即将退休.The English evening is about to begin.英语晚会即将开始.(5)come，go等动词用“一般现在时”表示按规定、计划或时间表将要发生的事
He starts next week.他下个星期出发.We leave very soon.我们很快就离开.(6)come，go等动词在口语中用“现在进行时”表示主语计划将要作的动作
They are leaving for New York tomorrow.明天他们将要动身前往纽约.Is your brother departing soon? 你的兄弟很快就要启程吗？
英语学习—语法—过去完成时
谓语动词构成：I/we/you/they had worked;he/she/it had worked
(1)表示过去某一时刻之前已经完成的动作，常与由by，before引导的时间状语连用
We had learned 5000 words by the end of last month.到上个月底为止我已经学了五千个单词.I had finished the composition before supper.晚饭前我就已经把作文写完了.(2)表示过去某一动作之前已经完成的动作，常与由when，before等连词引导的时间状语从句连用
When I woke up it had already stopped raining.我醒来的时候雨就已经停了.I hadn't learned any English before I came here.我来这儿之前没学过英语.(3)用于宾语从句或间接引语中
I wondered who had taken the umbrella without permission.我想知道谁不经允许就把雨伞拿去.He told me that he had passed the exam.他告诉我他已通过考试.(4)某些动词的过去完成时表示一个打算要做却没有做成的事.I had intended to come over to see you last night, but someone called and I couldn't get away.昨晚我本打算来看你，但有人来找，脱不开身.We had hoped to catch the early bus, but found it was gone.我们本来希望乘早班车，却发现车已开了.(5)用于表示与过去事实相反的虚拟条件从句中
If you had come yesterday, you would have met him.如果你昨天来的话，你就已经见到他的面了.She would have come if she hadn’t been so busy.要不是这么忙的话，她就已经来了.英语学习—语法—过去进行时
谓语动词构成：I/he/she/it was working;we/you/they were working
(1)表示过去某一时刻或过去某段时间内正在进行的动作，一般要有表示过去时间的状语
At that time she was working in Oxford.那时，她正在牛津大学工作.It was raining at 6 o'clock this morning.今天早晨六点钟天正下着雨.What were you doing when I phoned you last night? 昨晚我给你打电话时你在干什么？
(2)可用来表示由过去某时持续到另一时间的过去动作
He was studying in Cambridge between 1999 and 2001.在1999年和2001年那段时间，他在剑桥学习.From January to March I was traveling in Egypt.从3月份到4月份期间，我在埃及旅游.(3)表示故事发生的背景
It was a sunny morning.Some people were sitting on the riverbank.Some were walking with their dogs.Several boys were playing football nearby...一个阳光明媚的清晨.河堤上坐着几个人.有的人在溜狗.不远处有几个男童在踢足球...(4)与某些动词连用时，代替过去将来时
这类动词有 come来, go去, leave离开, start开始, stay逗留 等.主语必须是人.He telephoned me, saying that his aunt was coming to see me soon.他打电话给我，说他姨很快就要看我了.五、现在完成时
谓语动词构成：I/we/you/they have worked;he/she/it has worked
(1)表示过去某一时刻发生，且延续到现在的动作或状态，这种情况常与表示一段的时间状语连用
We have lived here since last October.自从去年十月份我们就一直住在这儿。
She has studied English for 5 years.她学英语已有5年之久
(2)表示某个已经发生且对现在造成影响或结果的动作，这种情况常不与任何时间状语连用
I'm sorry I have lost my key.I can't open the door.对不起，我把钥匙弄丢了.门开不了了.She has left.If you want to see her, you'll have to come tomorrow.她已经走了.如果你想见她的话，你得明天再来一趟.英语学习—语法—现在进行时
谓语动词构成：I am =I’m working , she/he/it is = he’s等 working, We/you/they are =We’re等working
(1)表示说话时正在进行或发生的动作
Please don’t make so much noise, I’m writing a composition.不要吵闹,我正在写作文.Let’s set off, it isn’t raining now.咱们出发把,现在天不下雨了.(2)有时通过上下问可以判断出应采用何种时态
Its four o’clock in the afternoon, the children are playing football on the sports ground.现在是下午4点,孩子们在操场上踢足球.(3)表示现阶段正在进行而说话时不一定在进行的动作
We are working in a factory these days.这几天我们在一家工厂工作.They are compiling a dictionary.他们在编一本词典.(4)在口语中表示主语计划将要做的动作
They are leaving for New York tomorrow.明天他们将要动身前往纽约.(5)现在进行时与always等副词连用时带有感情色彩
He's always quarrelling with others.他老喜欢跟别人吵架.She is constantly worrying about her son's health.她不停地为她儿子的健康担心着.The boy is forever asking questions.那个男孩老是提问问题.(6)有的现在进行时句子和一般现在时同义。用现在进行时表示问者的关切心情
How are you feeling today? 你今天感觉如何？
I am looking forward to your next visit.我盼望你下次再来.Why are you looking so sad? 为什么你看起来这么愁眉苦脸的样子呢？
(7)有的动词用于现在进行时表示“逐渐”的含义
Our study is becoming more interesting.我们的学习变得越来越有趣了.The leaves are turning red.树叶渐渐地变红了.Wait a moment，I am finishing my supper.等一会儿，我的晚饭就要吃完了.(8)“be”动词的现在进行时。“be”动词用于现在进行时表示说话者认为是短暂的、和平常不一样的、甚至是伪装的.He is being foolish.他在装傻.He is being honest.他表现得特别老实.I can't understand why he is being so selfish.我不明白此时他为何如此自私.
第五篇：一般过去时和现在完成时
一．一般将来时： _____________________________________The door bell is ringing.Ok, I will answer the door.Mom is busy cooking.I will help.Be going to 表将来：
(1)Basketball is my favorite.I am going to be a basketball player someday.(2)Debbie is going to swim across the England channel tomorrow.(3)She is going to set out from the French coast at five o’clock._____________________________________
(4)Look at the clouds.There is going to be a storm.(5)These two groups of people are angry here.They are going to conflict with each other._____________________________________
(6)He is staying in his cousin’s for a week.(7)I am leaving for London next week._______________________________.二．_____________________在时间或条件状语中的_____ 表将来
(1)Tomorrow he will be watching her anxiously as she swims to England.(2)I will be meeting her at the station when she arrived tomorrow.(3)If you park your car in the wrong place, a traffic policeman will soon find it.(4)if he lets you go without a ticket, you will be very lucky.三．_____________ 在 _____________中表将来
(1)The sports meeting takes place On October 18.(2)The train leaves at eight every morning from this station.四．现在完成时（have/has done）
表示过去发生的动作对现在产生的结果和影响。
We have had our breakfast.我们已经吃完饭了。
表示过去发生而持续到现在的动作或状态。常与since, for连用。谓语动词必须是延续性动词。HHHHHHHHHHHHjjj Hjkasjfklasjfklasdjl;fj he He has been in Hong Kong for ten years.He has learned English for six years.He has learned English since 1997.强调不久前刚刚完成的动作。常与yet(用于否定和疑问句), just, already连用，谓语动词是终止性动词。
He has just gone out.I have already finished my lunch.与一般过去时的区别。一般过去时表示事情发生在过去，不强调与现在的关系，与表示过去的时间状语连用。现在完成时强调与现在的关系、对现在的影响，不能与表示过去的时间状语连用。
现在完成进行时（have/has been doing）。动作从过去开始，一直延续到现在。How long have you been collecting shells? Have you been skating for five hours?
现在完成进行时与现在完成时的区别
没有时间状语时，前者表示动作__________，后者表示动作___________。The students have been preparing for the exam.The students have prepared for the exam.有时间状语时，前者表示动作__________，后者则不知道是否________ We have been living here for ten years.We have lived here for ten years.
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